Merge tag 'Second_Life_Release#4e2a9667-2025.08' into 2025.08

45 files changed, 1651 insertions, 751 deletions

diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index c68131402b..ce934f1a21 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -1,6 +1,7 @@
 # Replace tabs with spaces
 1b68f71348ecf3983b76b40d7940da8377f049b7
 33418a77b716e122da9778869cdbabe97c83ff37
+6b974724826a038b0db794460b322eb4921da735
 # Trim trailing whitespace
 a0b3021bdcf76859054fda8e30abb3ed47749e83
 8444cd9562a6a7b755fcb075864e205122354192
diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
new file mode 100644
index 0000000000..3e3e1df3e2
--- /dev/null
+++ b/.github/dependabot.yaml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: monthly
diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 5a5628ede2..4c948e5586 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -86,7 +86,7 @@ jobs:
       variants: ${{ matrix.configuration }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: ${{ github.event.pull_request.head.sha || github.sha }}
 
@@ -95,14 +95,14 @@ jobs:
         with:
           python-version: "3.11"
       - name: Checkout build variables
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: secondlife/build-variables
           ref: master
           path: .build-variables
 
       - name: Checkout master-message-template
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: secondlife/master-message-template
           path: .master-message-template
diff --git a/.github/workflows/pre-commit.yaml b/.github/workflows/pre-commit.yaml
index d626eef38d..726e1cd889 100644
--- a/.github/workflows/pre-commit.yaml
+++ b/.github/workflows/pre-commit.yaml
@@ -11,8 +11,8 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v4
         with:
           python-version: 3.x
-      - uses: pre-commit/action@v3.0.0
+      - uses: pre-commit/action@v3.0.1
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8baac5a81d..d1dcc93976 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -7,14 +7,14 @@ repos:
       - id: no-trigraphs
       - id: copyright
       - id: end-of-file
-        files: \.(cpp|c|h|py|glsl|cmake|txt)$
+        files: \.(cpp|c|m|mm|h|py|glsl|cmake|txt)$
         exclude: language.txt
       - id: indent-with-spaces
-        files: \.(cpp|c|h|inl|py|glsl|cmake)$
+        files: \.(cpp|c|m|mm|h|inl|py|glsl|cmake)$
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
       - id: check-xml
       - id: mixed-line-ending
       - id: trailing-whitespace
-        files: \.(cpp|c|h|inl|py|glsl|cmake|yaml|sh)$
+        files: \.(cpp|c|m|mm|h|inl|py|glsl|cmake|yaml|sh)$
diff --git a/autobuild.xml b/autobuild.xml
index fe83b6776f..a14d477234 100644
--- a/autobuild.xml
+++ b/autobuild.xml
@@ -1468,36 +1468,6 @@
         <key>name</key>
         <string>llphysicsextensions_source</string>
       </map>
-      <key>llphysicsextensions_stub</key>
-      <map>
-        <key>platforms</key>
-        <map>
-          <key>common</key>
-          <map>
-            <key>archive</key>
-            <map>
-              <key>hash</key>
-              <string>bc41438b10ac6474cf5560465a3662a64f9e65a81342e4c33f18f6694581c7ee28c9ee6f091c36e80a0b1e10c68205be71eb5f8e40fef115d2c744fc2bbfcb43</string>
-              <key>hash_algorithm</key>
-              <string>blake2b</string>
-              <key>url</key>
-              <string>https://github.com/AlchemyViewer/llphysicsextensions_stub/releases/download/v1.0-cb4900e/llphysicsextensions_stub-1.0-common-17836965684.tar.zst</string>
-            </map>
-            <key>name</key>
-            <string>common</string>
-          </map>
-        </map>
-        <key>license</key>
-        <string>internal</string>
-        <key>license_file</key>
-        <string>LICENSES/llphysicsextensions.txt</string>
-        <key>copyright</key>
-        <string>Copyright (c) 2010, Linden Research, Inc.</string>
-        <key>version</key>
-        <string>1.0</string>
-        <key>name</key>
-        <string>llphysicsextensions_stub</string>
-      </map>
       <key>llphysicsextensions_tpv</key>
       <map>
         <key>platforms</key>
diff --git a/indra/CMakeLists.txt b/indra/CMakeLists.txt
index ccc4b08447..6f3ec1cfff 100644
--- a/indra/CMakeLists.txt
+++ b/indra/CMakeLists.txt
@@ -61,9 +61,6 @@ add_subdirectory(cmake)
 add_subdirectory(${LIBS_OPEN_PREFIX}llaudio)
 add_subdirectory(${LIBS_OPEN_PREFIX}llappearance)
 add_subdirectory(${LIBS_OPEN_PREFIX}llcharacter)
-if (NOT HAVOK AND NOT HAVOK_TPV)
-  add_subdirectory(${LIBS_OPEN_PREFIX}llconvexdecomposition)
-endif ()
 add_subdirectory(${LIBS_OPEN_PREFIX}llcommon)
 add_subdirectory(${LIBS_OPEN_PREFIX}llcorehttp)
 add_subdirectory(${LIBS_OPEN_PREFIX}llimage)
@@ -73,6 +70,7 @@ add_subdirectory(${LIBS_OPEN_PREFIX}llinventory)
 add_subdirectory(${LIBS_OPEN_PREFIX}llmath)
 add_subdirectory(${LIBS_OPEN_PREFIX}llmeshoptimizer)
 add_subdirectory(${LIBS_OPEN_PREFIX}llmessage)
+add_subdirectory(${LIBS_OPEN_PREFIX}llphysicsextensionsos)
 add_subdirectory(${LIBS_OPEN_PREFIX}llprimitive)
 add_subdirectory(${LIBS_OPEN_PREFIX}llrender)
 add_subdirectory(${LIBS_OPEN_PREFIX}llfilesystem)
diff --git a/indra/cmake/LLPhysicsExtensions.cmake b/indra/cmake/LLPhysicsExtensions.cmake
index 49950be37b..84722b45a7 100644
--- a/indra/cmake/LLPhysicsExtensions.cmake
+++ b/indra/cmake/LLPhysicsExtensions.cmake
@@ -22,7 +22,6 @@ if (HAVOK)
    include(Havok)
    use_prebuilt_binary(llphysicsextensions_source)
    set(LLPHYSICSEXTENSIONS_SRC_DIR ${LIBS_PREBUILT_DIR}/llphysicsextensions/src)
-   target_compile_definitions( llphysicsextensions_impl INTERFACE LL_HAVOK=1 )
    if(DARWIN)
       set(LLPHYSICSEXTENSIONS_STUB_DIR ${LIBS_PREBUILT_DIR}/llphysicsextensions/stub)
       # can't set these library dependencies per-arch here, need to do it using XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=*] in newview/CMakeLists.txt
@@ -30,22 +29,18 @@ if (HAVOK)
       #target_link_libraries( llphysicsextensions_impl INTERFACE llphysicsextensionsstub)
    else()
      target_link_libraries( llphysicsextensions_impl INTERFACE llphysicsextensions)
+     target_compile_definitions( llphysicsextensions_impl INTERFACE LL_HAVOK=1 )
    endif()
+   target_include_directories( llphysicsextensions_impl INTERFACE   ${LIBS_PREBUILT_DIR}/include/llphysicsextensions)
 elseif (HAVOK_TPV)
    use_prebuilt_binary(llphysicsextensions_tpv)
-   if (CMAKE_OSX_ARCHITECTURES MATCHES x86_64)
-      target_link_directories( llphysicsextensions_impl INTERFACE ${ARCH_PREBUILT_DIRS_RELEASE} )
-   endif ()
-   if(WINDOWS)
-      target_link_libraries( llphysicsextensions_impl INTERFACE ${ARCH_PREBUILT_DIRS}/llphysicsextensions_tpv.lib)
-   else()
-      target_link_libraries( llphysicsextensions_impl INTERFACE ${ARCH_PREBUILT_DIRS}/libllphysicsextensions_tpv.a)
+   if (NOT DARWIN)
+      if(WINDOWS)
+         target_link_libraries( llphysicsextensions_impl INTERFACE ${ARCH_PREBUILT_DIRS}/llphysicsextensions_tpv.lib)
+      elseif(LINUX)
+         target_link_libraries( llphysicsextensions_impl INTERFACE ${ARCH_PREBUILT_DIRS}/libllphysicsextensions_tpv.a)
+      endif()
+      target_compile_definitions( llphysicsextensions_impl INTERFACE LL_HAVOK=1 )
    endif()
-   target_compile_definitions( llphysicsextensions_impl INTERFACE LL_HAVOK=1 )
-else (HAVOK)
-   use_prebuilt_binary(llphysicsextensions_stub)
-   set(LLPHYSICSEXTENSIONS_SRC_DIR ${LIBS_PREBUILT_DIR}/llphysicsextensions/stub)
-   target_link_libraries( llphysicsextensions_impl INTERFACE llphysicsextensionsstub)
-endif (HAVOK)
-
-target_include_directories( llphysicsextensions_impl INTERFACE   ${LIBS_PREBUILT_DIR}/include/llphysicsextensions)
+   target_include_directories( llphysicsextensions_impl INTERFACE   ${LIBS_PREBUILT_DIR}/include/llphysicsextensions)
+endif ()
diff --git a/indra/llappearance/llpolymesh.cpp b/indra/llappearance/llpolymesh.cpp
index 719381b4fc..d5323e0b84 100644
--- a/indra/llappearance/llpolymesh.cpp
+++ b/indra/llappearance/llpolymesh.cpp
@@ -283,6 +283,7 @@ bool LLPolyMeshSharedData::loadMesh( const std::string& fileName )
         LLFILE* fp = LLFile::fopen(fileName, "rb");                     /*Flawfinder: ignore*/
         if (!fp)
         {
+                LLError::LLUserWarningMsg::showMissingFiles();
                 LL_ERRS() << "can't open: " << fileName << LL_ENDL;
                 return false;
         }
diff --git a/indra/llcommon/llfile.cpp b/indra/llcommon/llfile.cpp
index 53659ac13f..a539e4fe28 100644
--- a/indra/llcommon/llfile.cpp
+++ b/indra/llcommon/llfile.cpp
@@ -35,7 +35,6 @@
 
 #if LL_WINDOWS
 #include "llwin32headers.h"
-#include <stdlib.h>                 // Windows errno
 #include <vector>
 #else
 #include <errno.h>
@@ -49,6 +48,86 @@ static std::string empty;
 // variants of strerror() to report errors.
 
 #if LL_WINDOWS
+// For the situations where we directly call into Windows API functions we need to translate
+// the Windows error codes into errno values
+namespace
+{
+    struct errentry
+    {
+        unsigned long oserr; // Windows OS error value
+        int errcode;         // System V error code
+    };
+}
+
+// translation table between Windows OS error value and System V errno code
+static errentry const errtable[]
+{
+    { ERROR_INVALID_FUNCTION,       EINVAL    },  //    1
+    { ERROR_FILE_NOT_FOUND,         ENOENT    },  //    2
+    { ERROR_PATH_NOT_FOUND,         ENOENT    },  //    3
+    { ERROR_TOO_MANY_OPEN_FILES,    EMFILE    },  //    4
+    { ERROR_ACCESS_DENIED,          EACCES    },  //    5
+    { ERROR_INVALID_HANDLE,         EBADF     },  //    6
+    { ERROR_ARENA_TRASHED,          ENOMEM    },  //    7
+    { ERROR_NOT_ENOUGH_MEMORY,      ENOMEM    },  //    8
+    { ERROR_INVALID_BLOCK,          ENOMEM    },  //    9
+    { ERROR_BAD_ENVIRONMENT,        E2BIG     },  //   10
+    { ERROR_BAD_FORMAT,             ENOEXEC   },  //   11
+    { ERROR_INVALID_ACCESS,         EINVAL    },  //   12
+    { ERROR_INVALID_DATA,           EINVAL    },  //   13
+    { ERROR_INVALID_DRIVE,          ENOENT    },  //   15
+    { ERROR_CURRENT_DIRECTORY,      EACCES    },  //   16
+    { ERROR_NOT_SAME_DEVICE,        EXDEV     },  //   17
+    { ERROR_NO_MORE_FILES,          ENOENT    },  //   18
+    { ERROR_LOCK_VIOLATION,         EACCES    },  //   33
+    { ERROR_BAD_NETPATH,            ENOENT    },  //   53
+    { ERROR_NETWORK_ACCESS_DENIED,  EACCES    },  //   65
+    { ERROR_BAD_NET_NAME,           ENOENT    },  //   67
+    { ERROR_FILE_EXISTS,            EEXIST    },  //   80
+    { ERROR_CANNOT_MAKE,            EACCES    },  //   82
+    { ERROR_FAIL_I24,               EACCES    },  //   83
+    { ERROR_INVALID_PARAMETER,      EINVAL    },  //   87
+    { ERROR_NO_PROC_SLOTS,          EAGAIN    },  //   89
+    { ERROR_DRIVE_LOCKED,           EACCES    },  //  108
+    { ERROR_BROKEN_PIPE,            EPIPE     },  //  109
+    { ERROR_DISK_FULL,              ENOSPC    },  //  112
+    { ERROR_INVALID_TARGET_HANDLE,  EBADF     },  //  114
+    { ERROR_WAIT_NO_CHILDREN,       ECHILD    },  //  128
+    { ERROR_CHILD_NOT_COMPLETE,     ECHILD    },  //  129
+    { ERROR_DIRECT_ACCESS_HANDLE,   EBADF     },  //  130
+    { ERROR_NEGATIVE_SEEK,          EINVAL    },  //  131
+    { ERROR_SEEK_ON_DEVICE,         EACCES    },  //  132
+    { ERROR_DIR_NOT_EMPTY,          ENOTEMPTY },  //  145
+    { ERROR_NOT_LOCKED,             EACCES    },  //  158
+    { ERROR_BAD_PATHNAME,           ENOENT    },  //  161
+    { ERROR_MAX_THRDS_REACHED,      EAGAIN    },  //  164
+    { ERROR_LOCK_FAILED,            EACCES    },  //  167
+    { ERROR_ALREADY_EXISTS,         EEXIST    },  //  183
+    { ERROR_FILENAME_EXCED_RANGE,   ENOENT    },  //  206
+    { ERROR_NESTING_NOT_ALLOWED,    EAGAIN    },  //  215
+    { ERROR_NO_UNICODE_TRANSLATION, EILSEQ    },  // 1113
+    { ERROR_NOT_ENOUGH_QUOTA,       ENOMEM    }   // 1816
+};
+
+static int set_errno_from_oserror(unsigned long oserr)
+{
+    if (!oserr)
+        return 0;
+
+    // Check the table for the Windows OS error code
+    for (const struct errentry &entry : errtable)
+    {
+        if (oserr == entry.oserr)
+        {
+            _set_errno(entry.errcode);
+            return -1;
+        }
+    }
+
+    _set_errno(EINVAL);
+    return -1;
+}
+
 // On Windows, use strerror_s().
 std::string strerr(int errn)
 {
@@ -57,7 +136,67 @@ std::string strerr(int errn)
     return buffer;
 }
 
-typedef std::basic_ios<char,std::char_traits < char > > _Myios;
+inline bool is_slash(wchar_t const c)
+{
+    return c == L'\\' || c == L'/';
+}
+
+static std::wstring utf8path_to_wstring(const std::string& utf8path)
+{
+    if (utf8path.size() >= MAX_PATH)
+    {
+        // By prepending "\\?\" to a path, Windows widechar file APIs will not fail on long path names
+        std::wstring utf16path = L"\\\\?\\" + ll_convert<std::wstring>(utf8path);
+        // We need to make sure that the path does not contain forward slashes as above
+        // prefix does bypass the path normalization that replaces slashes with backslashes
+        // before passing the path to kernel mode APIs
+        std::replace(utf16path.begin(), utf16path.end(), L'/', L'\\');
+        return utf16path;
+    }
+    return ll_convert<std::wstring>(utf8path);
+}
+
+static unsigned short get_fileattr(const std::wstring& utf16path, bool dontFollowSymLink = false)
+{
+    unsigned long  flags = FILE_FLAG_BACKUP_SEMANTICS;
+    if (dontFollowSymLink)
+    {
+        flags |= FILE_FLAG_OPEN_REPARSE_POINT;
+    }
+    HANDLE file_handle = CreateFileW(utf16path.c_str(), FILE_READ_ATTRIBUTES,
+                                     FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
+                                     nullptr, OPEN_EXISTING, flags, nullptr);
+    if (file_handle != INVALID_HANDLE_VALUE)
+    {
+        FILE_ATTRIBUTE_TAG_INFO attribute_info;
+        if (GetFileInformationByHandleEx(file_handle, FileAttributeTagInfo, &attribute_info, sizeof(attribute_info)))
+        {
+            // A volume path alone (only drive letter) is not recognized as directory while it technically is
+            bool is_directory = (attribute_info.FileAttributes & FILE_ATTRIBUTE_DIRECTORY) ||
+                                (iswalpha(utf16path[0]) && utf16path[1] == ':' &&
+                                 (!utf16path[2] || (is_slash(utf16path[2]) && !utf16path[3])));
+            unsigned short st_mode = is_directory ? S_IFDIR :
+                                     (attribute_info.FileAttributes & FILE_ATTRIBUTE_REPARSE_POINT ? S_IFLNK : S_IFREG);
+            st_mode |= (attribute_info.FileAttributes & FILE_ATTRIBUTE_READONLY) ? S_IREAD : S_IREAD | S_IWRITE;
+            // we do not try to guess executable flag
+
+            // propagate user bits to group/other fields:
+            st_mode |= (st_mode & 0700) >> 3;
+            st_mode |= (st_mode & 0700) >> 6;
+
+            CloseHandle(file_handle);
+            return st_mode;
+        }
+    }
+    // Retrieve last error and set errno before calling CloseHandle()
+    set_errno_from_oserror(GetLastError());
+
+    if (file_handle != INVALID_HANDLE_VALUE)
+    {
+        CloseHandle(file_handle);
+    }
+    return 0;
+}
 
 #else
 // On Posix we want to call strerror_r(), but alarmingly, there are two
@@ -108,18 +247,13 @@ std::string strerr(int errn)
 }
 #endif  // ! LL_WINDOWS
 
-// On either system, shorthand call just infers global 'errno'.
-std::string strerr()
-{
-    return strerr(errno);
-}
-
-int warnif(const std::string& desc, const std::string& filename, int rc, int accept=0)
+static int warnif(const std::string& desc, const std::string& filename, int rc, int accept = 0)
 {
     if (rc < 0)
     {
         // Capture errno before we start emitting output
         int errn = errno;
+
         // For certain operations, a particular errno value might be
         // acceptable -- e.g. stat() could permit ENOENT, mkdir() could permit
         // EEXIST. Don't warn if caller explicitly says this errno is okay.
@@ -176,62 +310,59 @@ int warnif(const std::string& desc, const std::string& filename, int rc, int acc
 // static
 int LLFile::mkdir(const std::string& dirname, int perms)
 {
+    // We often use mkdir() to ensure the existence of a directory that might
+    // already exist. There is no known case in which we want to call out as
+    // an error the requested directory already existing.
 #if LL_WINDOWS
     // permissions are ignored on Windows
-    std::wstring utf16dirname = ll_convert<std::wstring>(dirname);
-    int rc = _wmkdir(utf16dirname.c_str());
+    int rc = 0;
+    std::wstring utf16dirname = utf8path_to_wstring(dirname);
+    if (!CreateDirectoryW(utf16dirname.c_str(), nullptr))
+    {
+        // Only treat other errors than an already existing file as a real error
+        unsigned long oserr = GetLastError();
+        if (oserr != ERROR_ALREADY_EXISTS)
+        {
+            rc = set_errno_from_oserror(oserr);
+        }
+    }
 #else
     int rc = ::mkdir(dirname.c_str(), (mode_t)perms);
-#endif
-    // We often use mkdir() to ensure the existence of a directory that might
-    // already exist. There is no known case in which we want to call out as
-    // an error the requested directory already existing.
     if (rc < 0 && errno == EEXIST)
     {
         // this is not the error you want, move along
         return 0;
     }
+#endif
     // anything else might be a problem
-    return warnif("mkdir", dirname, rc, EEXIST);
+    return warnif("mkdir", dirname, rc);
 }
 
 // static
-int LLFile::rmdir(const std::string& dirname)
+int LLFile::rmdir(const std::string& dirname, int suppress_error)
 {
 #if LL_WINDOWS
-    // permissions are ignored on Windows
-    std::wstring utf16dirname = ll_convert<std::wstring>(dirname);
+    std::wstring utf16dirname = utf8path_to_wstring(dirname);
     int rc = _wrmdir(utf16dirname.c_str());
 #else
     int rc = ::rmdir(dirname.c_str());
 #endif
-    return warnif("rmdir", dirname, rc);
+    return warnif("rmdir", dirname, rc, suppress_error);
 }
 
 // static
-LLFILE* LLFile::fopen(const std::string& filename, const char* mode)    /* Flawfinder: ignore */
-{
-#if LL_WINDOWS
-    std::wstring utf16filename = ll_convert<std::wstring>(filename);
-    std::wstring utf16mode = ll_convert<std::wstring>(std::string(mode));
-    return _wfopen(utf16filename.c_str(),utf16mode.c_str());
-#else
-    return ::fopen(filename.c_str(),mode);  /* Flawfinder: ignore */
-#endif
-}
-
-LLFILE* LLFile::_fsopen(const std::string& filename, const char* mode, int sharingFlag)
+LLFILE* LLFile::fopen(const std::string& filename, const char* mode)
 {
 #if LL_WINDOWS
-    std::wstring utf16filename = ll_convert<std::wstring>(filename);
+    std::wstring utf16filename = utf8path_to_wstring(filename);
     std::wstring utf16mode = ll_convert<std::wstring>(std::string(mode));
-    return _wfsopen(utf16filename.c_str(),utf16mode.c_str(),sharingFlag);
+    return _wfopen(utf16filename.c_str(), utf16mode.c_str());
 #else
-    llassert(0);//No corresponding function on non-windows
-    return NULL;
+    return ::fopen(filename.c_str(),mode);
 #endif
 }
 
+// static
 int LLFile::close(LLFILE * file)
 {
     int ret_value = 0;
@@ -242,9 +373,10 @@ int LLFile::close(LLFILE * file)
     return ret_value;
 }
 
+// static
 std::string LLFile::getContents(const std::string& filename)
 {
-    LLFILE* fp = fopen(filename, "rb"); /* Flawfinder: ignore */
+    LLFILE* fp = LLFile::fopen(filename, "rb");
     if (fp)
     {
         fseek(fp, 0, SEEK_END);
@@ -261,42 +393,80 @@ std::string LLFile::getContents(const std::string& filename)
     return LLStringUtil::null;
 }
 
-int LLFile::remove(const std::string& filename, int supress_error)
+// static
+int LLFile::remove(const std::string& filename, int suppress_error)
 {
 #if LL_WINDOWS
-    std::wstring utf16filename = ll_convert<std::wstring>(filename);
-    int rc = _wremove(utf16filename.c_str());
+    // Posix remove() works on both files and directories although on Windows
+    // remove() and its wide char variant _wremove() only removes files just
+    // as its siblings unlink() and _wunlink().
+    // If we really only want to support files we should instead use
+    // unlink() in the non-Windows part below too
+    int rc = -1;
+    std::wstring utf16filename = utf8path_to_wstring(filename);
+    unsigned short st_mode = get_fileattr(utf16filename);
+    if (S_ISDIR(st_mode))
+    {
+        rc = _wrmdir(utf16filename.c_str());
+    }
+    else if (S_ISREG(st_mode))
+    {
+        rc = _wunlink(utf16filename.c_str());
+    }
+    else if (st_mode)
+    {
+        // it is something else than a file or directory
+        // this should not really happen as long as we do not allow for symlink
+        // detection in the optional parameter to get_fileattr()
+        rc = set_errno_from_oserror(ERROR_INVALID_PARAMETER);
+    }
+    else
+    {
+        // get_fileattr() failed and already set errno, preserve it for correct error reporting
+    }
 #else
     int rc = ::remove(filename.c_str());
 #endif
-    return warnif("remove", filename, rc, supress_error);
+    return warnif("remove", filename, rc, suppress_error);
 }
 
-int LLFile::rename(const std::string& filename, const std::string& newname, int supress_error)
+// static
+int LLFile::rename(const std::string& filename, const std::string& newname, int suppress_error)
 {
 #if LL_WINDOWS
-    std::wstring utf16filename = ll_convert<std::wstring>(filename);
-    std::wstring utf16newname = ll_convert<std::wstring>(newname);
-    int rc = _wrename(utf16filename.c_str(),utf16newname.c_str());
+    // Posix rename() will gladly overwrite a file at newname if it exists, the Windows
+    // rename(), respectively _wrename(), will bark on that. Instead call directly the Windows
+    // API MoveFileEx() and use its flags to specify that overwrite is allowed.
+    std::wstring utf16filename = utf8path_to_wstring(filename);
+    std::wstring utf16newname = utf8path_to_wstring(newname);
+    int rc = 0;
+    if (!MoveFileExW(utf16filename.c_str(), utf16newname.c_str(), MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED))
+    {
+        rc = set_errno_from_oserror(GetLastError());
+    }
 #else
     int rc = ::rename(filename.c_str(),newname.c_str());
 #endif
-    return warnif(STRINGIZE("rename to '" << newname << "' from"), filename, rc, supress_error);
+    return warnif(STRINGIZE("rename to '" << newname << "' from"), filename, rc, suppress_error);
 }
 
+// Make this a define rather than using magic numbers multiple times in the code
+#define LLFILE_COPY_BUFFER_SIZE 16384
+
+// static
 bool LLFile::copy(const std::string& from, const std::string& to)
 {
     bool copied = false;
-    LLFILE* in = LLFile::fopen(from, "rb");     /* Flawfinder: ignore */
+    LLFILE* in = LLFile::fopen(from, "rb");
     if (in)
     {
-        LLFILE* out = LLFile::fopen(to, "wb");      /* Flawfinder: ignore */
+        LLFILE* out = LLFile::fopen(to, "wb");
         if (out)
         {
-            char buf[16384];        /* Flawfinder: ignore */
+            char buf[LLFILE_COPY_BUFFER_SIZE];
             size_t readbytes;
             bool write_ok = true;
-            while(write_ok && (readbytes = fread(buf, 1, 16384, in))) /* Flawfinder: ignore */
+            while (write_ok && (readbytes = fread(buf, 1, LLFILE_COPY_BUFFER_SIZE, in)))
             {
                 if (fwrite(buf, 1, readbytes, out) != readbytes)
                 {
@@ -315,33 +485,62 @@ bool LLFile::copy(const std::string& from, const std::string& to)
     return copied;
 }
 
-int LLFile::stat(const std::string& filename, llstat* filestatus)
+// static
+int LLFile::stat(const std::string& filename, llstat* filestatus, int suppress_error)
 {
 #if LL_WINDOWS
-    std::wstring utf16filename = ll_convert<std::wstring>(filename);
-    int rc = _wstat(utf16filename.c_str(),filestatus);
+    std::wstring utf16filename = utf8path_to_wstring(filename);
+    int rc = _wstat64(utf16filename.c_str(), filestatus);
 #else
-    int rc = ::stat(filename.c_str(),filestatus);
+    int rc = ::stat(filename.c_str(), filestatus);
 #endif
-    // We use stat() to determine existence (see isfile(), isdir()).
-    // Don't spam the log if the subject pathname doesn't exist.
-    return warnif("stat", filename, rc, ENOENT);
+    return warnif("stat", filename, rc, suppress_error);
 }
 
-bool LLFile::isdir(const std::string& filename)
+// static
+unsigned short LLFile::getattr(const std::string& filename, bool dontFollowSymLink, int suppress_error)
 {
-    llstat st;
+#if LL_WINDOWS
+    // _wstat64() is a bit heavyweight on Windows, use a more lightweight API
+    // to just get the attributes
+    int rc = -1;
+    std::wstring utf16filename = utf8path_to_wstring(filename);
+    unsigned short st_mode = get_fileattr(utf16filename, dontFollowSymLink);
+    if (st_mode)
+    {
+        return st_mode;
+    }
+#else
+    llstat filestatus;
+    int rc = dontFollowSymLink ? ::lstat(filename.c_str(), &filestatus) : ::stat(filename.c_str(), &filestatus);
+    if (rc == 0)
+    {
+        return filestatus.st_mode;
+    }
+#endif
+    warnif("getattr", filename, rc, suppress_error);
+    return 0;
+}
 
-    return stat(filename, &st) == 0 && S_ISDIR(st.st_mode);
+// static
+bool LLFile::isdir(const std::string& filename)
+{
+    return S_ISDIR(getattr(filename));
 }
 
+// static
 bool LLFile::isfile(const std::string& filename)
 {
-    llstat st;
+    return S_ISREG(getattr(filename));
+}
 
-    return stat(filename, &st) == 0 && S_ISREG(st.st_mode);
+// static
+bool LLFile::islink(const std::string& filename)
+{
+    return S_ISLNK(getattr(filename, true));
 }
 
+// static
 const char *LLFile::tmpdir()
 {
     static std::string utf8path;
@@ -368,75 +567,8 @@ const char *LLFile::tmpdir()
     return utf8path.c_str();
 }
 
-
-/***************** Modified file stream created to overcome the incorrect behaviour of posix fopen in windows *******************/
-
 #if LL_WINDOWS
 
-LLFILE *    LLFile::_Fiopen(const std::string& filename,
-        std::ios::openmode mode)
-{   // open a file
-    static const char *mods[] =
-    {   // fopen mode strings corresponding to valid[i]
-    "r", "w", "w", "a", "rb", "wb", "wb", "ab",
-    "r+", "w+", "a+", "r+b", "w+b", "a+b",
-    0};
-    static const int valid[] =
-    {   // valid combinations of open flags
-        ios_base::in,
-        ios_base::out,
-        ios_base::out | ios_base::trunc,
-        ios_base::out | ios_base::app,
-        ios_base::in | ios_base::binary,
-        ios_base::out | ios_base::binary,
-        ios_base::out | ios_base::trunc | ios_base::binary,
-        ios_base::out | ios_base::app | ios_base::binary,
-        ios_base::in | ios_base::out,
-        ios_base::in | ios_base::out | ios_base::trunc,
-        ios_base::in | ios_base::out | ios_base::app,
-        ios_base::in | ios_base::out | ios_base::binary,
-        ios_base::in | ios_base::out | ios_base::trunc
-            | ios_base::binary,
-        ios_base::in | ios_base::out | ios_base::app
-            | ios_base::binary,
-    0};
-
-    LLFILE *fp = 0;
-    int n;
-    ios_base::openmode atendflag = mode & ios_base::ate;
-    ios_base::openmode norepflag = mode & ios_base::_Noreplace;
-
-    if (mode & ios_base::_Nocreate)
-        mode |= ios_base::in;   // file must exist
-    mode &= ~(ios_base::ate | ios_base::_Nocreate | ios_base::_Noreplace);
-    for (n = 0; valid[n] != 0 && valid[n] != mode; ++n)
-        ;   // look for a valid mode
-
-    if (valid[n] == 0)
-        return (0); // no valid mode
-    else if (norepflag && mode & (ios_base::out | ios_base::app)
-        && (fp = LLFile::fopen(filename, "r")) != 0)    /* Flawfinder: ignore */
-        {   // file must not exist, close and fail
-        fclose(fp);
-        return (0);
-        }
-    else if (fp != 0 && fclose(fp) != 0)
-        return (0); // can't close after test open
-// should open with protection here, if other than default
-    else if ((fp = LLFile::fopen(filename, mods[n])) == 0)  /* Flawfinder: ignore */
-        return (0); // open failed
-
-    if (!atendflag || fseek(fp, 0, SEEK_END) == 0)
-        return (fp);    // no need to seek to end, or seek succeeded
-
-    fclose(fp); // can't position at end
-    return (0);
-}
-
-#endif /* LL_WINDOWS */
-
-
-#if LL_WINDOWS
 /************** input file stream ********************************/
 
 llifstream::llifstream() {}
diff --git a/indra/llcommon/llfile.h b/indra/llcommon/llfile.h
index 1661cbeb55..04a2946ac4 100644
--- a/indra/llcommon/llfile.h
+++ b/indra/llcommon/llfile.h
@@ -41,8 +41,9 @@ typedef FILE    LLFILE;
 #include <sys/stat.h>
 
 #if LL_WINDOWS
-// windows version of stat function and stat data structure are called _stat
-typedef struct _stat    llstat;
+// The Windows version of stat function and stat data structure are called _stat64
+// We use _stat64 here to support 64-bit st_size and time_t values
+typedef struct _stat64  llstat;
 #else
 typedef struct stat     llstat;
 #include <sys/types.h>
@@ -56,35 +57,110 @@ typedef struct stat     llstat;
 # define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
 #endif
 
+// Windows C runtime library does not define this and does not support symlink detection in the
+// stat functions but we do in our getattr() function
+#ifndef S_IFLNK
+#define S_IFLNK 0xA000 /* symlink */
+#endif
+
+#ifndef S_ISLNK
+#define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
+#endif
+
 #include "llstring.h" // safe char* -> std::string conversion
 
+/// LLFile is a class of static functions operating on paths
+/// All the functions with a path string input take UTF8 path/filenames
 class LL_COMMON_API LLFile
 {
 public:
-    // All these functions take UTF8 path/filenames.
-    static  LLFILE* fopen(const std::string& filename,const char* accessmode);  /* Flawfinder: ignore */
-    static  LLFILE* _fsopen(const std::string& filename,const char* accessmode,int  sharingFlag);
+    /// open a file with the specified access mode
+    static  LLFILE* fopen(const std::string& filename, const char* accessmode);  /* Flawfinder: ignore */
+    ///< 'accessmode' follows the rules of the Posix fopen() mode parameter
+    /// "r" open the file for reading only and positions the stream at the beginning
+    /// "r+" open the file for reading and writing and positions the stream at the beginning
+    /// "w" open the file for reading and writing and truncate it to zero length
+    /// "w+" open or create the file for reading and writing and truncate to zero length if it existed
+    /// "a" open the file for reading and writing and position the stream at the end of the file
+    /// "a+" open or create the file for reading and writing and position the stream at the end of the file
+    ///
+    /// in addition to these values, "b" can be appended to indicate binary stream access, but on Linux and Mac
+    /// this is strictly for compatibility and has no effect. On Windows this makes the file functions not
+    /// try to translate line endings. Windows also allows to append "t" to indicate text mode. If neither
+    /// "b" or "t" is defined, Windows uses the value set by _fmode which by default is _O_TEXT.
+    /// This means that it is always a good idea to append "b" specifically for binary file access to
+    /// avoid corruption of the binary consistency of the data stream when reading or writing
+    /// Other characters in 'accessmode' will usually cause an error as fopen will verify this parameter
+    /// @returns a valid LLFILE* pointer on success or NULL on failure
 
     static  int     close(LLFILE * file);
 
+    /// retrieve the content of a file into a string
     static std::string getContents(const std::string& filename);
+    ///< @returns the content of the file or an empty string on failure
 
-    // perms is a permissions mask like 0777 or 0700.  In most cases it will
-    // be overridden by the user's umask.  It is ignored on Windows.
-    // mkdir() considers "directory already exists" to be SUCCESS.
+    /// create a directory
     static  int     mkdir(const std::string& filename, int perms = 0700);
-
-    static  int     rmdir(const std::string& filename);
-    static  int     remove(const std::string& filename, int supress_error = 0);
-    static  int     rename(const std::string& filename,const std::string& newname, int supress_error = 0);
+    ///< perms is a permissions mask like 0777 or 0700.  In most cases it will be
+    ///  overridden by the user's umask. It is ignored on Windows.
+    ///  mkdir() considers "directory already exists" to be not an error.
+    ///  @returns 0 on success and -1 on failure.
+
+    //// remove a directory
+    static  int     rmdir(const std::string& filename, int suppress_error = 0);
+    ///< pass ENOENT in the optional 'suppress_error' parameter
+    ///  if you don't want a warning in the log when the directory does not exist
+    ///  @returns 0 on success and -1 on failure.
+
+    /// remove a file or directory
+    static  int     remove(const std::string& filename, int suppress_error = 0);
+    ///< pass ENOENT in the optional 'suppress_error' parameter
+    ///  if you don't want a warning in the log when the directory does not exist
+    ///  @returns 0 on success and -1 on failure.
+
+    /// rename a file
+    static  int     rename(const std::string& filename, const std::string& newname, int suppress_error = 0);
+    ///< it will silently overwrite newname if it exists without returning an error
+    ///  Posix guarantees that if newname already exists, then there will be no moment
+    ///  in which for other processes newname does not exist. There is no such guarantee
+    ///  under Windows at this time. It may do it in the same way but the used Windows API
+    ///  does not make such guarantees.
+    ///  @returns 0 on success and -1 on failure.
+
+
+    /// copy the contents of file from 'from' to 'to' filename
     static  bool    copy(const std::string& from, const std::string& to);
-
-    static  int     stat(const std::string& filename,llstat*    file_status);
-    static  bool    isdir(const std::string&    filename);
-    static  bool    isfile(const std::string&   filename);
-    static  LLFILE *    _Fiopen(const std::string& filename,
-            std::ios::openmode mode);
-
+    ///< @returns true on success and false on failure.
+
+    /// return the file stat structure for filename
+    static  int     stat(const std::string& filename, llstat* file_status, int suppress_error = ENOENT);
+    ///< for compatibility with existing uses of LL_File::stat() we use ENOENT as default in the
+    ///  optional 'suppress_error' parameter to avoid spamming the log with warnings when the API
+    ///  is used to detect if a file exists
+    ///  @returns 0 on success and -1 on failure.
+
+    /// get the file or directory attributes for filename
+    static  unsigned short getattr(const std::string& filename, bool dontFollowSymLink = false, int suppress_error = ENOENT);
+    ///< a more lightweight function on Windows to stat, that just returns the file attribute flags
+    ///  dontFollowSymLinks set to true returns the attributes of the symlink if it is one, rather than resolving it
+    ///  we pass by default ENOENT in the optional 'suppress_error' parameter to not spam the log with
+    ///  warnings when the file or directory does not exist
+    ///  @returns 0 on failure and a st_mode value with either S_IFDIR or S_IFREG set otherwise
+    ///  together with the three access bits which under Windows only the write bit is relevant.
+
+    /// check if filename is an existing directory
+    static  bool    isdir(const std::string& filename);
+    ///< @returns true if the path is for an existing directory
+
+    /// check if filename is an existing file
+    static  bool    isfile(const std::string& filename);
+    ///< @returns true if the path is for an existing file
+
+    /// check if filename is a symlink
+    static  bool    islink(const std::string& filename);
+    ///< @returns true if the path is pointing at a symlink
+
+    /// return a path to the temporary directory on the system
     static  const char * tmpdir();
 };
 
diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp
index 2c46c59aa5..edc891f5ec 100644
--- a/indra/llcommon/llsys.cpp
+++ b/indra/llcommon/llsys.cpp
@@ -1357,10 +1357,6 @@ bool gunzip_file(const std::string& srcfile, const std::string& dstfile)
     } while(gzeof(src) == 0);
     fclose(dst);
     dst = NULL;
-#if LL_WINDOWS
-    // Rename in windows needs the dstfile to not exist.
-    LLFile::remove(dstfile, ENOENT);
-#endif
     if (LLFile::rename(tmpfile, dstfile) == -1) goto err;       /* Flawfinder: ignore */
     retval = true;
 err:
@@ -1408,10 +1404,6 @@ bool gzip_file(const std::string& srcfile, const std::string& dstfile)
 
     gzclose(dst);
     dst = NULL;
-#if LL_WINDOWS
-    // Rename in windows needs the dstfile to not exist.
-    LLFile::remove(dstfile);
-#endif
     if (LLFile::rename(tmpfile, dstfile) == -1) goto err;       /* Flawfinder: ignore */
     retval = true;
  err:
diff --git a/indra/llconvexdecomposition/CMakeLists.txt b/indra/llconvexdecomposition/CMakeLists.txt
deleted file mode 100644
index 7dae884db8..0000000000
--- a/indra/llconvexdecomposition/CMakeLists.txt
+++ /dev/null
@@ -1,39 +0,0 @@
-# -*- cmake -*-
-
-project(llconvexdecomposition)
-
-include(00-Common)
-include(LLCommon)
-include(LLMath)
-include(VHACD)
-
-set(llconvexdecomposition_SOURCE_FILES
-        llconvexdecomposition.cpp
-        llconvexdecompositionvhacd.cpp
-        )
-
-set(llconvexdecomposition_HEADER_FILES
-        CMakeLists.txt
-        llconvexdecomposition.h
-        llconvexdecompositionvhacd.h
-        )
-
-set_source_files_properties(${llconvexdecomposition_HEADER_FILES}
-        PROPERTIES HEADER_FILE_ONLY TRUE)
-
-list(APPEND llconvexdecomposition_SOURCE_FILES ${llconvexdecomposition_HEADER_FILES})
-
-add_library (llconvexdecomposition ${llconvexdecomposition_SOURCE_FILES})
-target_include_directories(llconvexdecomposition INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
-
-target_link_libraries(llconvexdecomposition
-        llcommon
-        llmath
-        ll::vhacd)
-
-if(WINDOWS)
-  target_compile_options(llconvexdecomposition PRIVATE /bigobj)
-endif()
-
-# Add tests
-
diff --git a/indra/llcrashlogger/llcrashlogger.cpp b/indra/llcrashlogger/llcrashlogger.cpp
index b1b698375a..d5c585b45e 100644
--- a/indra/llcrashlogger/llcrashlogger.cpp
+++ b/indra/llcrashlogger/llcrashlogger.cpp
@@ -576,10 +576,6 @@ bool LLCrashLogger::init()
     std::string old_log_file = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "crashreport.log.old");
     std::string log_file = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "crashreport.log");
 
-#if LL_WINDOWS
-    LLAPRFile::remove(old_log_file);
-#endif
-
     LLFile::rename(log_file.c_str(), old_log_file.c_str());
 
     // Set the log file to crashreport.log
diff --git a/indra/llfilesystem/lldir_utils_objc.mm b/indra/llfilesystem/lldir_utils_objc.mm
index 01fe9e1f2c..35513d5647 100644
--- a/indra/llfilesystem/lldir_utils_objc.mm
+++ b/indra/llfilesystem/lldir_utils_objc.mm
@@ -1,28 +1,28 @@
-/** 
+/**
  * @file lldir_utils_objc.mm
  * @brief Cocoa implementation of directory utilities for macOS
  *
  * $LicenseInfo:firstyear=2020&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2020, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
- */ 
+ */
 #if LL_DARWIN
 
 //WARNING:  This file CANNOT use standard linden includes due to conflicts between definitions of BOOL
@@ -39,18 +39,18 @@ std::string getSystemTempFolder()
             tempDir = @"/tmp";
         result = std::string([tempDir UTF8String]);
     }
-    
+
     return result;
 }
 
-//findSystemDirectory scoped exclusively to this file. 
+//findSystemDirectory scoped exclusively to this file.
 std::string findSystemDirectory(NSSearchPathDirectory searchPathDirectory,
                                    NSSearchPathDomainMask domainMask)
 {
     std::string result;
     @autoreleasepool {
         NSString *path = nil;
-        
+
         // Search for the path
         NSArray* paths = NSSearchPathForDirectoriesInDomains(searchPathDirectory,
                                                              domainMask,
@@ -60,10 +60,10 @@ std::string findSystemDirectory(NSSearchPathDirectory searchPathDirectory,
             path = [paths objectAtIndex:0];
             //HACK:  Always attempt to create directory, ignore errors.
             NSError *error = nil;
-            
+
             [[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:&error];
-            
-            
+
+
             result = std::string([path UTF8String]);
         }
     }
@@ -88,7 +88,7 @@ std::string getSystemResourceFolder()
         NSString *bundlePath = [[NSBundle mainBundle] resourcePath];
         result = std::string([bundlePath UTF8String]);
     }
-    
+
     return result;
 }
 
@@ -102,7 +102,7 @@ std::string getSystemApplicationSupportFolder()
 {
     return findSystemDirectory (NSApplicationSupportDirectory,
                                 NSUserDomainMask);
-    
+
 }
 
 #endif // LL_DARWIN
diff --git a/indra/llfilesystem/llfilesystem.cpp b/indra/llfilesystem/llfilesystem.cpp
index 5ce5244107..541266af4f 100644
--- a/indra/llfilesystem/llfilesystem.cpp
+++ b/indra/llfilesystem/llfilesystem.cpp
@@ -103,9 +103,6 @@ bool LLFileSystem::renameFile(const LLUUID& old_file_id, const LLAssetType::ETyp
     const std::string old_filename = LLDiskCache::metaDataToFilepath(old_file_id, old_file_type);
     const std::string new_filename = LLDiskCache::metaDataToFilepath(new_file_id, new_file_type);
 
-    // Rename needs the new file to not exist.
-    LLFileSystem::removeFile(new_file_id, new_file_type, ENOENT);
-
     if (LLFile::rename(old_filename, new_filename) != 0)
     {
         // We would like to return false here indicating the operation
diff --git a/indra/llphysicsextensionsos/CMakeLists.txt b/indra/llphysicsextensionsos/CMakeLists.txt
new file mode 100644
index 0000000000..c04115ef26
--- /dev/null
+++ b/indra/llphysicsextensionsos/CMakeLists.txt
@@ -0,0 +1,47 @@
+# -*- cmake -*-
+
+project(llphysicsextensionsos)
+
+include(00-Common)
+include(LLCommon)
+include(LLMath)
+include(VHACD)
+
+set(llphysicsextensionsos_SOURCE_FILES
+        llconvexdecomposition.cpp
+        llconvexdecompositionvhacd.cpp
+        llpathinglib.cpp
+        LLPathingLibStubImpl.cpp
+        llphysicsextensions.cpp
+        LLPhysicsExtensionsStubImpl.cpp
+        )
+
+set(llphysicsextensionsos_HEADER_FILES
+        CMakeLists.txt
+        llconvexdecomposition.h
+        llconvexdecompositionvhacd.h
+        llpathinglib.h
+        LLPathingLibStubImpl.h
+        llphysicsextensions.h
+        LLPhysicsExtensionsStubImpl.h
+        )
+
+set_source_files_properties(${llphysicsextensionsos_HEADER_FILES}
+        PROPERTIES HEADER_FILE_ONLY TRUE)
+
+list(APPEND llphysicsextensionsos_SOURCE_FILES ${llphysicsextensionsos_HEADER_FILES})
+
+add_library (llphysicsextensionsos ${llphysicsextensionsos_SOURCE_FILES})
+target_include_directories(llphysicsextensionsos INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+
+target_link_libraries(llphysicsextensionsos
+        llcommon
+        llmath
+        ll::vhacd)
+
+if(WINDOWS)
+  target_compile_options(llphysicsextensionsos PRIVATE /bigobj)
+endif()
+
+# Add tests
+
diff --git a/indra/llphysicsextensionsos/LLPathingLibStubImpl.cpp b/indra/llphysicsextensionsos/LLPathingLibStubImpl.cpp
new file mode 100644
index 0000000000..9830fd1ad0
--- /dev/null
+++ b/indra/llphysicsextensionsos/LLPathingLibStubImpl.cpp
@@ -0,0 +1,109 @@
+/**
+* @file   LLPathingLibStubImpl.cpp
+* @author prep@lindenlab.com
+* @brief  A stubbed implementation of LLPathingLib
+*
+* $LicenseInfo:firstyear=2012&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 20112010, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#include "linden_common.h"
+
+#include "llpathinglib.h"
+#include "LLPathingLibStubImpl.h"
+
+#include "llsd.h"
+
+//=============================================================================
+LLPathingLibImpl::LLPathingLibImpl()
+{
+}
+
+LLPathingLibImpl::~LLPathingLibImpl()
+{
+
+}
+
+LLPathingLib* LLPathingLibImpl::getInstance()
+{
+    return NULL;
+}
+
+
+LLPathingLib::LLPLResult LLPathingLibImpl::initSystem()
+{
+    return LLPL_NOT_IMPLEMENTED;
+}
+
+LLPathingLib::LLPLResult LLPathingLibImpl::quitSystem()
+{
+    return LLPL_NOT_IMPLEMENTED;
+}
+
+LLPathingLib::LLPLResult LLPathingLibImpl::extractNavMeshSrcFromLLSD( const LLSD::Binary& dataBlock, int dir )
+{
+    return LLPL_NOT_IMPLEMENTED;
+}
+
+void LLPathingLibImpl::processNavMeshData()
+{
+}
+
+LLPathingLibImpl::LLPLResult LLPathingLibImpl::generatePath( const PathingPacket& pathingPacket )
+{
+    return LLPL_NOT_IMPLEMENTED;
+}
+
+void LLPathingLibImpl::setNavMeshMaterialType( LLPLCharacterType materialType )
+{
+}
+
+void LLPathingLibImpl::setNavMeshColors( const NavMeshColors& color )
+{
+}
+
+void LLPathingLibImpl::renderNavMesh()
+{
+}
+
+void LLPathingLibImpl::renderNavMeshEdges()
+{
+}
+
+void LLPathingLibImpl::renderNavMeshShapesVBO( U32 shapeRenderFlags )
+{
+}
+
+void LLPathingLibImpl::renderPath()
+{
+}
+
+void LLPathingLibImpl::renderPathBookend( LLRender& gl, LLPathingLib::LLPLPathBookEnd type )
+{
+}
+
+void LLPathingLibImpl::cleanupVBOManager()
+{
+}
+
+void LLPathingLibImpl::cleanupResidual()
+{
+}
diff --git a/indra/llphysicsextensionsos/LLPathingLibStubImpl.h b/indra/llphysicsextensionsos/LLPathingLibStubImpl.h
new file mode 100644
index 0000000000..8a97566e8c
--- /dev/null
+++ b/indra/llphysicsextensionsos/LLPathingLibStubImpl.h
@@ -0,0 +1,78 @@
+/**
+* @file   LLPathingLibSubImpl.h
+* @author prep@lindenlab.com
+* @brief  A stubbed implementation of LLPathingLib
+*
+* $LicenseInfo:firstyear=2012&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2012, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#ifndef LL_PATHING_LIB_H
+#define LL_PATHING_LIB_H
+
+#include "llpathinglib.h"
+
+class LLSD;
+
+//=============================================================================
+class LLPathingLibImpl : public LLPathingLib
+{
+public:
+    LLPathingLibImpl();
+    virtual ~LLPathingLibImpl();
+
+    // Obtain a pointer to the actual implementation
+    static LLPathingLib* getInstance();
+    static LLPathingLib::LLPLResult initSystem();
+    static LLPathingLib::LLPLResult quitSystem();
+
+    //Extract and store navmesh data from the llsd datablock sent down by the server
+    virtual LLPLResult extractNavMeshSrcFromLLSD( const LLSD::Binary& dataBlock, int dir );
+    //Stitch any stored navmeshes together
+    virtual void processNavMeshData();
+
+    //Method used to generate and visualize a path on the viewers navmesh
+    virtual LLPLResult generatePath( const PathingPacket& pathingPacket );
+
+    //Set the material type for the heatmap type
+    virtual void setNavMeshMaterialType( LLPLCharacterType materialType );
+    //Set the various navmesh colors
+    virtual void setNavMeshColors( const NavMeshColors& color );
+
+    //The entry method to rendering the client side navmesh
+    virtual void renderNavMesh();
+    //The entry method to rendering the client side navmesh edges
+    virtual void renderNavMeshEdges();
+    //The entry method to render the client navmesh shapes VBO
+    virtual void renderNavMeshShapesVBO( U32 shapeRenderFlags );
+    //The entry method to render the clients designated path
+    virtual void renderPath();
+    //The entry method to render the capsule bookends for the clients designated path
+    virtual void renderPathBookend( LLRender& gl, LLPathingLib::LLPLPathBookEnd type );
+
+    //Method to delete any vbo's that are currently being managed by the pathing library
+    virtual void cleanupVBOManager();
+    //Method to cleanup any allocations within the implementation
+    virtual void cleanupResidual();
+};
+
+#endif //LL_PATHING_LIB_H
+
diff --git a/indra/llphysicsextensionsos/LLPhysicsExtensionsStubImpl.cpp b/indra/llphysicsextensionsos/LLPhysicsExtensionsStubImpl.cpp
new file mode 100644
index 0000000000..8401e16e9c
--- /dev/null
+++ b/indra/llphysicsextensionsos/LLPhysicsExtensionsStubImpl.cpp
@@ -0,0 +1,51 @@
+/**
+* @file   LLPhysicsExtensionsStubImpl.cpp
+* @author prep@lindenlab.com
+* @brief  A stubbed implementation of LLPhysicsExtensions
+*
+* $LicenseInfo:firstyear=2012&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2012, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#include "linden_common.h"
+
+#include "llphysicsextensions.h"
+#include "LLPhysicsExtensionsStubImpl.h"
+
+//=============================================================================
+LLPhysicsExtensionsImpl::LLPhysicsExtensionsImpl()
+{
+}
+
+LLPhysicsExtensionsImpl::~LLPhysicsExtensionsImpl()
+{
+}
+
+bool LLPhysicsExtensionsImpl::initSystem()
+{
+    return false;
+}
+
+bool LLPhysicsExtensionsImpl::quitSystem()
+{
+    return false;
+}
+
diff --git a/indra/llphysicsextensionsos/LLPhysicsExtensionsStubImpl.h b/indra/llphysicsextensionsos/LLPhysicsExtensionsStubImpl.h
new file mode 100644
index 0000000000..135f92bb88
--- /dev/null
+++ b/indra/llphysicsextensionsos/LLPhysicsExtensionsStubImpl.h
@@ -0,0 +1,46 @@
+/**
+* @file   LLPhysicsExtensionsSubImpl.h
+* @author prep@lindenlab.com
+* @brief  A stubbed implementation of LLPhysicsExtensions
+*
+* $LicenseInfo:firstyear=2012&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2012, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#ifndef LL_PHYSICS_EXTENSIONS_STUB_IMPL_H
+#define LL_PHYSICS_EXTENSIONS_STUB_IMPL_H
+
+#include "llphysicsextensions.h"
+
+//=============================================================================
+class LLPhysicsExtensionsImpl : public LLPhysicsExtensions
+{
+    public:
+
+        LLPhysicsExtensionsImpl();
+        virtual ~LLPhysicsExtensionsImpl();
+
+        static bool initSystem();
+        static bool quitSystem();
+};
+
+#endif //LL_PHYSICS_EXTENSIONS_STUB_IMPL_H
+
diff --git a/indra/llconvexdecomposition/llconvexdecomposition.cpp b/indra/llphysicsextensionsos/llconvexdecomposition.cpp
index 7b9d775c53..d58c0fec54 100644
--- a/indra/llconvexdecomposition/llconvexdecomposition.cpp
+++ b/indra/llphysicsextensionsos/llconvexdecomposition.cpp
@@ -25,6 +25,7 @@
 * $/LicenseInfo$
 */
 
+#include <unordered_map>
 #include "linden_common.h"
 
 #include "llconvexdecompositionvhacd.h"
diff --git a/indra/llconvexdecomposition/llconvexdecomposition.h b/indra/llphysicsextensionsos/llconvexdecomposition.h
index 8008bc6e12..8008bc6e12 100644
--- a/indra/llconvexdecomposition/llconvexdecomposition.h
+++ b/indra/llphysicsextensionsos/llconvexdecomposition.h
diff --git a/indra/llconvexdecomposition/llconvexdecompositionvhacd.cpp b/indra/llphysicsextensionsos/llconvexdecompositionvhacd.cpp
index 78876f9f36..78876f9f36 100644
--- a/indra/llconvexdecomposition/llconvexdecompositionvhacd.cpp
+++ b/indra/llphysicsextensionsos/llconvexdecompositionvhacd.cpp
diff --git a/indra/llconvexdecomposition/llconvexdecompositionvhacd.h b/indra/llphysicsextensionsos/llconvexdecompositionvhacd.h
index 675356629c..675356629c 100644
--- a/indra/llconvexdecomposition/llconvexdecompositionvhacd.h
+++ b/indra/llphysicsextensionsos/llconvexdecompositionvhacd.h
diff --git a/indra/llphysicsextensionsos/llpathinglib.cpp b/indra/llphysicsextensionsos/llpathinglib.cpp
new file mode 100644
index 0000000000..f41cb9c45f
--- /dev/null
+++ b/indra/llphysicsextensionsos/llpathinglib.cpp
@@ -0,0 +1,83 @@
+/**
+* @file   llpathinglib.cpp
+* @author prep@lindenlab.com
+* @brief  LLPathingLib core creation methods
+*
+* $LicenseInfo:firstyear=2012&license=lgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2011, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#include "linden_common.h"
+
+#include "LLPathingLibStubImpl.h"
+
+#include "llpathinglib.h"
+
+//=============================================================================
+
+/*static */bool LLPathingLib::s_isInitialized = false;
+
+//=============================================================================
+
+
+/*static*/bool LLPathingLib::isFunctional()
+{
+    return false;
+}
+
+/*static*/LLPathingLib* LLPathingLib::getInstance()
+{
+    if ( !s_isInitialized )
+    {
+        return NULL;
+    }
+    else
+    {
+        return LLPathingLibImpl::getInstance();
+    }
+}
+
+//=============================================================================
+
+/*static */LLPathingLib::LLPLResult LLPathingLib::initSystem()
+{
+    if ( LLPathingLibImpl::initSystem() == LLPL_OK )
+    {
+        s_isInitialized = true;
+        return LLPL_OK;
+    }
+    return LLPL_UNKOWN_ERROR;
+}
+//=============================================================================
+/*static */LLPathingLib::LLPLResult LLPathingLib::quitSystem()
+{
+    LLPLResult quitResult = LLPL_UNKOWN_ERROR;
+
+    if (s_isInitialized)
+    {
+        quitResult = LLPathingLibImpl::quitSystem();
+        s_isInitialized = false;
+    }
+
+    return quitResult;
+}
+//=============================================================================
+
diff --git a/indra/llphysicsextensionsos/llpathinglib.h b/indra/llphysicsextensionsos/llpathinglib.h
new file mode 100644
index 0000000000..41583f1fd1
--- /dev/null
+++ b/indra/llphysicsextensionsos/llpathinglib.h
@@ -0,0 +1,187 @@
+/**
+ * @file llpathinglib.cpp
+ * @author prep@lindenlab.com
+ * @brief LLPathingLib interface definition
+ *
+ * $LicenseInfo:firstyear=2012&license=lgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_PATHING_LIBRARY
+#define LL_PATHING_LIBRARY
+
+#include "llpreprocessor.h"
+#include "llsd.h"
+#include "v3dmath.h"
+#include "v4math.h"
+
+#include "v4color.h"
+#include "v4coloru.h"
+#include "llphysicsextensions.h"
+
+typedef int bool32;
+
+#if defined(_WIN32) || defined(_WIN64)
+#define LLCD_CALL __cdecl
+#else
+#define LLCD_CALL
+#endif
+
+class LLRender;
+
+//=============================================================================
+class LLPathingLib
+{
+
+public:
+    enum LLShapeType
+    {
+        LLST_WalkableObjects = 0,
+        LLST_ObstacleObjects,
+        LLST_MaterialPhantoms,
+        LLST_ExclusionPhantoms,
+        LLST_MaxShapeTypes  = LLST_ExclusionPhantoms+1,
+        LLST_None           = LLST_MaxShapeTypes+2,
+        LLST_SimpleBox      = LLST_None+1,
+        LLST_SimpleCapsule  = LLST_SimpleBox+1,
+    };
+
+    enum LLShapeTypeFlag
+    {
+        LLSTB_WalkableObjects   = 0x1 << 1,
+        LLSTB_ObstacleObjects   = 0x1 << 2,
+        LLSTB_MaterialPhantoms  = 0x1 << 3,
+        LLSTB_ExclusionPhantoms = 0x1 << 4,
+        LLSTB_None              = 0x1 << 5
+    };
+
+    enum LLPLPathBookEnd
+    {
+        LLPL_START = 0,
+        LLPL_END,
+    };
+
+    enum LLPLResult
+    {
+        LLPL_OK = 0,
+        LLPL_NOTSET,
+        LLPL_ERROR,
+        LLPL_NO_NAVMESH,
+        LLPL_UNKOWN_ERROR,
+        LLPL_NO_PATH,
+        LLPL_PATH_GENERATED_OK,
+        LLPL_NOT_IMPLEMENTED,
+    };
+
+    enum LLPLCharacterType
+    {
+        LLPL_CHARACTER_TYPE_A    = 4,
+        LLPL_CHARACTER_TYPE_B    = 3,
+        LLPL_CHARACTER_TYPE_C    = 2,
+        LLPL_CHARACTER_TYPE_D    = 1,
+        LLPL_CHARACTER_TYPE_NONE = 0
+    };
+
+    struct PathingPacket
+    {
+        PathingPacket() : mHasPointA(false), mHasPointB(false), mCharacterWidth(0.0f), mCharacterType(LLPL_CHARACTER_TYPE_NONE) {}
+        bool              mHasPointA;
+        LLVector3         mStartPointA;
+        LLVector3         mEndPointA;
+        bool              mHasPointB;
+        LLVector3         mStartPointB;
+        LLVector3         mEndPointB;
+        F32               mCharacterWidth;
+        LLPLCharacterType mCharacterType;
+    };
+
+    struct NavMeshColors
+    {
+        LLColor4U     mWalkable;
+        LLColor4U     mObstacle;
+        LLColor4U     mMaterial;
+        LLColor4U     mExclusion;
+        LLColor4U     mConnectedEdge;
+        LLColor4U     mBoundaryEdge;
+        LLColor4      mHeatColorBase;
+        LLColor4      mHeatColorMax;
+        LLColor4U     mFaceColor;
+        LLColor4U     mStarValid;
+        LLColor4U     mStarInvalid;
+        LLColor4U     mTestPath;
+        LLColor4U     mWaterColor;
+    };
+
+public:
+    //Ctor
+    LLPathingLib() {}
+    virtual ~LLPathingLib() {}
+
+    /// @returns false if this is the stub
+    static bool isFunctional();
+
+    // Obtain a pointer to the actual implementation
+    static LLPathingLib* getInstance();
+    static LLPathingLib::LLPLResult initSystem();
+    static LLPathingLib::LLPLResult quitSystem();
+
+    //Extract and store navmesh data from the llsd datablock sent down by the server
+    virtual LLPLResult extractNavMeshSrcFromLLSD( const LLSD::Binary& dataBlock, int dir )  = 0;
+    //Stitch any stored navmeshes together
+    virtual void processNavMeshData( ) = 0;
+
+    //Method used to generate and visualize a path on the viewers navmesh
+    virtual LLPLResult generatePath( const PathingPacket& pathingPacket ) = 0;
+
+    //Set the material type for the heatmap type
+    virtual void setNavMeshMaterialType( LLPLCharacterType materialType ) = 0;
+    //Set the various navmesh colors
+    virtual void setNavMeshColors( const NavMeshColors& color ) = 0;
+
+    //The entry method to rendering the client side navmesh
+    virtual void renderNavMesh()  = 0;
+    //The entry method to rendering the client side navmesh edges
+    virtual void renderNavMeshEdges()  = 0;
+    //The entry method to render the client navmesh shapes VBO
+    virtual void renderNavMeshShapesVBO( U32 shapeRenderFlags )  = 0;
+    //The entry method to render the clients designated path
+    virtual void renderPath() = 0;
+    //The entry method to render the capsule bookends for the clients designated path
+    virtual void renderPathBookend( LLRender& gl, LLPathingLib::LLPLPathBookEnd type ) = 0;
+    //Renders all of the generated simple shapes (using their default transforms)
+    virtual void renderSimpleShapes( LLRender& gl, F32 regionsWaterHeight ) = 0;
+
+    //Method called from second life to create a capsule from properties of a character
+    virtual void createPhysicsCapsuleRep( F32 length, F32 radius,  BOOL horizontal, const LLUUID& id ) = 0;
+    //Removes any cached physics capsule using a list of cached uuids
+    virtual void cleanupPhysicsCapsuleRepResiduals() = 0;
+    //Renders a selected uuids physics rep
+    virtual void renderSimpleShapeCapsuleID( LLRender& gl, const LLUUID& id, const LLVector3& pos, const LLQuaternion& rot  ) = 0;
+
+    //Method to delete any vbo's that are currently being managed by the pathing library
+    virtual void cleanupVBOManager( ) = 0;
+    //Method to cleanup any allocations within the implementation
+    virtual void cleanupResidual( ) = 0;
+private:
+    static bool s_isInitialized;
+};
+
+#endif //LL_PATHING_LIBRARY
diff --git a/indra/llphysicsextensionsos/llphysicsextensions.cpp b/indra/llphysicsextensionsos/llphysicsextensions.cpp
new file mode 100644
index 0000000000..3bb8ffbf1a
--- /dev/null
+++ b/indra/llphysicsextensionsos/llphysicsextensions.cpp
@@ -0,0 +1,78 @@
+/**
+* @file   llphysicsextensions.cpp
+* @author nyx@lindenlab.com
+* @brief  LLPhysicsExtensions core initialization methods
+*
+* $LicenseInfo:firstyear=2012&license=lgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2011, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#include "linden_common.h"
+
+#include "llphysicsextensions.h"
+#include "LLPhysicsExtensionsStubImpl.h"
+
+
+//disable the undefined symbol optimization
+//#pragma warning (disable : 4221)
+
+//=============================================================================
+
+/*static */bool LLPhysicsExtensions::s_isInitialized = false;
+
+
+/*static*/bool LLPhysicsExtensions::isFunctional()
+{
+    return false;
+}
+
+//=============================================================================
+
+/*static*/LLPhysicsExtensions* LLPhysicsExtensions::getInstance()
+{
+    if ( !s_isInitialized )
+    {
+        return NULL;
+    }
+    else
+    {
+        return LLPhysicsExtensionsImpl::getInstance();
+    }
+}
+
+//=============================================================================
+
+/*static */bool LLPhysicsExtensions::initSystem()
+{
+    bool result = LLPhysicsExtensionsImpl::initSystem();
+    if ( result )
+    {
+        s_isInitialized = true;
+    }
+    return result;
+}
+//=============================================================================
+/*static */bool LLPhysicsExtensions::quitSystem()
+{
+    return LLPhysicsExtensionsImpl::quitSystem();
+}
+//=============================================================================
+
diff --git a/indra/llphysicsextensionsos/llphysicsextensions.h b/indra/llphysicsextensionsos/llphysicsextensions.h
new file mode 100644
index 0000000000..fa23ebd725
--- /dev/null
+++ b/indra/llphysicsextensionsos/llphysicsextensions.h
@@ -0,0 +1,59 @@
+/**
+* @file   llphysicsextensions.h
+* @author nyx@lindenlab.com
+* @brief  LLPhysicsExtensions core shared initialization
+*         routines
+*
+* $LicenseInfo:firstyear=2012&license=lgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2011, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#ifndef LL_PHYSICS_EXTENSIONS
+#define LL_PHYSICS_EXTENSIONS
+
+#include "llpreprocessor.h"
+#include "llsd.h"
+#include "v3dmath.h"
+
+#define LLPHYSICSEXTENSIONS_VERSION "1.0"
+
+typedef int bool32;
+
+class LLPhysicsExtensions
+{
+
+public:
+    // Obtain a pointer to the actual implementation
+    static LLPhysicsExtensions* getInstance();
+
+    /// @returns false if this is the stub
+    static bool isFunctional();
+
+    static bool initSystem();
+    static bool quitSystem();
+
+private:
+    static bool s_isInitialized;
+};
+
+#endif //LL_PATHING_LIBRARY
+
+
diff --git a/indra/llplugin/llpluginprocessparent.cpp b/indra/llplugin/llpluginprocessparent.cpp
index 63f1de8d6a..d6ab52a17a 100644
--- a/indra/llplugin/llpluginprocessparent.cpp
+++ b/indra/llplugin/llpluginprocessparent.cpp
@@ -986,6 +986,7 @@ void LLPluginProcessParent::poll(F64 timeout)
     }
 
     // Remove instances in the done state from the sInstances map.
+    LLCoros::LockType lock(*sInstancesMutex);
     mapInstances_t::iterator itClean = sInstances.begin();
     while (itClean != sInstances.end())
     {
diff --git a/indra/llplugin/slplugin/slplugin-objc.mm b/indra/llplugin/slplugin/slplugin-objc.mm
index 68ff196eaf..adde594b59 100644
--- a/indra/llplugin/slplugin/slplugin-objc.mm
+++ b/indra/llplugin/slplugin/slplugin-objc.mm
@@ -7,21 +7,21 @@
  * $LicenseInfo:firstyear=2010&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2010, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  *
@@ -38,51 +38,51 @@
 
 void LLCocoaPlugin::setupCocoa()
 {
-	static bool inited = false;
-	
-	if(!inited)
-	{
-		createAutoReleasePool();
-		
-		// The following prevents the Cocoa command line parser from trying to open 'unknown' arguements as documents.
-		// ie. running './secondlife -set Language fr' would cause a pop-up saying can't open document 'fr' 
-		// when init'ing the Cocoa App window.		
-		[[NSUserDefaults standardUserDefaults] setObject:@"NO" forKey:@"NSTreatUnknownArgumentsAsOpen"];
-		
-		// This is a bit of voodoo taken from the Apple sample code "CarbonCocoa_PictureCursor":
-		//   http://developer.apple.com/samplecode/CarbonCocoa_PictureCursor/index.html
-		
-		//	Needed for Carbon based applications which call into Cocoa
-		NSApplicationLoad();
-
-		//	Must first call [[[NSWindow alloc] init] release] to get the NSWindow machinery set up so that NSCursor can use a window to cache the cursor image
-		[[[NSWindow alloc] init] release];
-		
+    static bool inited = false;
+
+    if(!inited)
+    {
+        createAutoReleasePool();
+
+        // The following prevents the Cocoa command line parser from trying to open 'unknown' arguements as documents.
+        // ie. running './secondlife -set Language fr' would cause a pop-up saying can't open document 'fr'
+        // when init'ing the Cocoa App window.
+        [[NSUserDefaults standardUserDefaults] setObject:@"NO" forKey:@"NSTreatUnknownArgumentsAsOpen"];
+
+        // This is a bit of voodoo taken from the Apple sample code "CarbonCocoa_PictureCursor":
+        //   http://developer.apple.com/samplecode/CarbonCocoa_PictureCursor/index.html
+
+        //  Needed for Carbon based applications which call into Cocoa
+        NSApplicationLoad();
+
+        //  Must first call [[[NSWindow alloc] init] release] to get the NSWindow machinery set up so that NSCursor can use a window to cache the cursor image
+        [[[NSWindow alloc] init] release];
+
         mPluginWindow = [NSApp mainWindow];
-        
-		deleteAutoReleasePool();
-		
-		inited = true;
-	}
+
+        deleteAutoReleasePool();
+
+        inited = true;
+    }
 }
 
 static NSAutoreleasePool *sPool = NULL;
 
 void LLCocoaPlugin::createAutoReleasePool()
 {
-	if(!sPool)
-	{
-		sPool = [[NSAutoreleasePool alloc] init];
-	}
+    if(!sPool)
+    {
+        sPool = [[NSAutoreleasePool alloc] init];
+    }
 }
 
 void LLCocoaPlugin::deleteAutoReleasePool()
 {
-	if(sPool)
-	{
-		[sPool release];
-		sPool = NULL;
-	}
+    if(sPool)
+    {
+        [sPool release];
+        sPool = NULL;
+    }
 }
 
 LLCocoaPlugin::LLCocoaPlugin():mHackState(0)
@@ -110,12 +110,12 @@ void LLCocoaPlugin::setupGroup()
     //    {
     //        // Start out with a window layer that's way out in front (fixes the problem with the menubar not getting hidden on first switch to fullscreen youtube)
     //        SetWindowGroupName(layer_group, CFSTR("SLPlugin Layer"));
-    //        SetWindowGroupLevel(layer_group, kCGOverlayWindowLevel);		
+    //        SetWindowGroupLevel(layer_group, kCGOverlayWindowLevel);
     //    }
-    
+
 }
 
-void LLCocoaPlugin::updateWindows()  
+void LLCocoaPlugin::updateWindows()
 {
 //    NSArray* window_list = [NSApp orderedWindows];
 //    NSWindow* current_window = [window_list objectAtIndex:0];
@@ -123,38 +123,38 @@ void LLCocoaPlugin::updateWindows()
 //    bool this_is_front_process = false;
 //    bool parent_is_front_process = false;
 //
-//    
+//
 //    // Check for a change in this process's frontmost window.
 //    if ( current_window != mFrontWindow )
 //    {
 //        // and figure out whether this process or its parent are currently frontmost
 //        if ( current_window == parent_window ) parent_is_front_process = true;
 //        if ( current_window == mPluginWindow ) this_is_front_process = true;
-//    
+//
 //        if (current_window != NULL && mFrontWindow == NULL)
 //        {
 //            // Opening the first window
-//            
+//
 //            if(mHackState == 0)
 //            {
 //                // Next time through the event loop, lower the window group layer
 //                mHackState = 1;
 //            }
-//            
+//
 //            if(parent_is_front_process)
 //            {
 //                // Bring this process's windows to the front.
 //                [mPluginWindow makeKeyAndOrderFront:NSApp];
 //                [mPluginWindow setOrderedIndex:0];
 //            }
-//            
+//
 //            [NSApp activateIgnoringOtherApps:YES];
 //        }
-//        
+//
 //        else if (( current_window == NULL) && (mFrontWindow != NULL))
 //        {
 //            // Closing the last window
-//            
+//
 //            if(this_is_front_process)
 //            {
 //                // Try to bring this process's parent to the front
@@ -171,7 +171,7 @@ void LLCocoaPlugin::updateWindows()
 ////            }
 //            mHackState = 2;
 //        }
-//        
+//
 //        mFrontWindow = [window_list objectAtIndex:0];
 //    }
  }
diff --git a/indra/llprimitive/CMakeLists.txt b/indra/llprimitive/CMakeLists.txt
index 0e8f591800..d93a75b05d 100644
--- a/indra/llprimitive/CMakeLists.txt
+++ b/indra/llprimitive/CMakeLists.txt
@@ -87,15 +87,18 @@ target_link_libraries(llprimitive
         llxml
         llcharacter
         llrender
-        llphysicsextensions_impl
         ll::colladadom
         ll::glm
         )
 
-if (TARGET llconvexdecomposition)
+if (HAVOK OR HAVOK_TPV)
     target_link_libraries(llprimitive
-            llconvexdecomposition
-            )
+        llphysicsextensions_impl
+        )
+else()
+    target_link_libraries(llprimitive
+        llphysicsextensionsos
+        )
 endif ()
 
 include(LibraryInstall)
diff --git a/indra/llui/llviewereventrecorder.cpp b/indra/llui/llviewereventrecorder.cpp
index 6d907d7e45..9eefba1390 100644
--- a/indra/llui/llviewereventrecorder.cpp
+++ b/indra/llui/llviewereventrecorder.cpp
@@ -34,8 +34,6 @@ LLViewerEventRecorder::LLViewerEventRecorder() {
   logEvents = false;
   // Remove any previous event log file
   std::string old_log_ui_events_to_llsd_file = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "SecondLife_Events_log.old");
-  LLFile::remove(old_log_ui_events_to_llsd_file, ENOENT);
-
 
   mLogFilename = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "SecondLife_Events_log.llsd");
   LLFile::rename(mLogFilename, old_log_ui_events_to_llsd_file, ENOENT);
diff --git a/indra/llwindow/llopenglview-objc.mm b/indra/llwindow/llopenglview-objc.mm
index 268afe843d..bdb5d8def0 100644
--- a/indra/llwindow/llopenglview-objc.mm
+++ b/indra/llwindow/llopenglview-objc.mm
@@ -125,7 +125,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
 - (unsigned long)getVramSize
 {
     CGLRendererInfoObj info = 0;
-	GLint vram_megabytes = 0;
+    GLint vram_megabytes = 0;
     int num_renderers = 0;
     CGLError the_err = CGLQueryRendererInfo (CGDisplayIDToOpenGLDisplayMask(kCGDirectMainDisplay), &info, &num_renderers);
     if(0 == the_err)
@@ -143,7 +143,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
         vram_megabytes = 256;
     }
 
-	return (unsigned long)vram_megabytes; // return value is in megabytes.
+    return (unsigned long)vram_megabytes; // return value is in megabytes.
 }
 
 - (void)viewWillMoveToWindow:(nullable NSWindow *)newWindow
@@ -164,24 +164,24 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void)viewDidMoveToWindow
 {
-	[[NSNotificationCenter defaultCenter] addObserver:self
-											 selector:@selector(windowResized:) name:NSWindowDidResizeNotification
-											   object:[self window]];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(windowResized:) name:NSWindowDidResizeNotification
+                                               object:[self window]];
 
     [[NSNotificationCenter defaultCenter] addObserver:self
-											 selector:@selector(windowWillMiniaturize:) name:NSWindowWillMiniaturizeNotification
-											   object:[self window]];
+                                             selector:@selector(windowWillMiniaturize:) name:NSWindowWillMiniaturizeNotification
+                                               object:[self window]];
 
     [[NSNotificationCenter defaultCenter] addObserver:self
-											 selector:@selector(windowDidDeminiaturize:) name:NSWindowDidDeminiaturizeNotification
-											   object:[self window]];
+                                             selector:@selector(windowDidDeminiaturize:) name:NSWindowDidDeminiaturizeNotification
+                                               object:[self window]];
 
     [[NSNotificationCenter defaultCenter] addObserver:self
-											 selector:@selector(windowDidBecomeKey:) name:NSWindowDidBecomeKeyNotification
-											   object:[self window]];
-	[[NSNotificationCenter defaultCenter] addObserver:self
-											 selector:@selector(windowDidChangeScreen:) name:NSWindowDidChangeScreenNotification
-											   object:[self window]];
+                                             selector:@selector(windowDidBecomeKey:) name:NSWindowDidBecomeKeyNotification
+                                               object:[self window]];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(windowDidChangeScreen:) name:NSWindowDidChangeScreenNotification
+                                               object:[self window]];
 
 
     NSRect wnd_rect = [[self window] frame];
@@ -215,28 +215,28 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 -(void)windowDidChangeScreen:(NSNotification *)notification;
 {
-	callWindowDidChangeScreen();
+    callWindowDidChangeScreen();
 }
 
 - (void)dealloc
 {
-	[[NSNotificationCenter defaultCenter] removeObserver:self];
-	[super dealloc];
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+    [super dealloc];
 }
 
 - (id) init
 {
-	return [self initWithFrame:[self bounds] withSamples:2 andVsync:TRUE];
+    return [self initWithFrame:[self bounds] withSamples:2 andVsync:TRUE];
 }
 
 - (id) initWithSamples:(NSUInteger)samples
 {
-	return [self initWithFrame:[self bounds] withSamples:samples andVsync:TRUE];
+    return [self initWithFrame:[self bounds] withSamples:samples andVsync:TRUE];
 }
 
 - (id) initWithSamples:(NSUInteger)samples andVsync:(BOOL)vsync
 {
-	return [self initWithFrame:[self bounds] withSamples:samples andVsync:vsync];
+    return [self initWithFrame:[self bounds] withSamples:samples andVsync:vsync];
 }
 
 #if LL_DARWIN
@@ -248,21 +248,21 @@ attributedStringInfo getSegments(NSAttributedString *str)
 - (id) initWithFrame:(NSRect)frame withSamples:(NSUInteger)samples andVsync:(BOOL)vsync
 {
     [self registerForDraggedTypes:[NSArray arrayWithObject:NSPasteboardTypeURL]];
-	[self initWithFrame:frame];
+    [self initWithFrame:frame];
 
-	// Initialize with a default "safe" pixel format that will work with versions dating back to OS X 10.6.
-	// Any specialized pixel formats, i.e. a core profile pixel format, should be initialized through rebuildContextWithFormat.
-	// 10.7 and 10.8 don't really care if we're defining a profile or not.  If we don't explicitly request a core or legacy profile, it'll always assume a legacy profile (for compatibility reasons).
+    // Initialize with a default "safe" pixel format that will work with versions dating back to OS X 10.6.
+    // Any specialized pixel formats, i.e. a core profile pixel format, should be initialized through rebuildContextWithFormat.
+    // 10.7 and 10.8 don't really care if we're defining a profile or not.  If we don't explicitly request a core or legacy profile, it'll always assume a legacy profile (for compatibility reasons).
 
-	NSOpenGLPixelFormatAttribute SDRAttrs[] = {
+    NSOpenGLPixelFormatAttribute SDRAttrs[] = {
         NSOpenGLPFANoRecovery,
-		NSOpenGLPFADoubleBuffer,
-		NSOpenGLPFAClosestPolicy,
-		NSOpenGLPFAAccelerated,
-		NSOpenGLPFADepthSize, 24,
-		NSOpenGLPFAColorSize, 32,
-		NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion4_1Core,
-		0
+        NSOpenGLPFADoubleBuffer,
+        NSOpenGLPFAClosestPolicy,
+        NSOpenGLPFAAccelerated,
+        NSOpenGLPFADepthSize, 24,
+        NSOpenGLPFAColorSize, 32,
+        NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion4_1Core,
+        0
     };
 
     NSOpenGLPixelFormatAttribute HDRAttrs[] = {
@@ -298,21 +298,21 @@ attributedStringInfo getSegments(NSAttributedString *str)
         pixelFormat = [[[NSOpenGLPixelFormat alloc] initWithAttributes:SDRAttrs] autorelease];
     }
 
-	if (pixelFormat == nil)
-	{
-		NSLog(@"Failed to create pixel format!", nil);
-		return nil;
-	}
+    if (pixelFormat == nil)
+    {
+        NSLog(@"Failed to create pixel format!", nil);
+        return nil;
+    }
 
-	glContext = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext:nil];
+    glContext = [[NSOpenGLContext alloc] initWithFormat:pixelFormat shareContext:nil];
 
-	if (glContext == nil)
-	{
-		NSLog(@"Failed to create OpenGL context!", nil);
-		return nil;
-	}
+    if (glContext == nil)
+    {
+        NSLog(@"Failed to create OpenGL context!", nil);
+        return nil;
+    }
 
-	[self setPixelFormat:pixelFormat];
+    [self setPixelFormat:pixelFormat];
 
     if(mHDRDisplay)
     {
@@ -327,55 +327,55 @@ attributedStringInfo getSegments(NSAttributedString *str)
         NSLog(@"Extended color space applied for HDR Display", nil);
     }
 
-	//for retina support
-	[self setWantsBestResolutionOpenGLSurface:gHiDPISupport];
+    //for retina support
+    [self setWantsBestResolutionOpenGLSurface:gHiDPISupport];
 
-	[self setOpenGLContext:glContext];
+    [self setOpenGLContext:glContext];
 
-	[glContext setView:self];
+    [glContext setView:self];
 
-	[glContext makeCurrentContext];
+    [glContext makeCurrentContext];
 
-	if (vsync)
-	{
-		GLint value = 1;
+    if (vsync)
+    {
+        GLint value = 1;
         [glContext setValues:&value forParameter:NSOpenGLContextParameterSwapInterval];
-	} else {
-		// supress this error after move to Xcode 7:
-		// error: null passed to a callee that requires a non-null argument [-Werror,-Wnonnull]
-		// Tried using ObjC 'nonnull' keyword as per SO article but didn't build
-		GLint swapInterval=0;
+    } else {
+        // supress this error after move to Xcode 7:
+        // error: null passed to a callee that requires a non-null argument [-Werror,-Wnonnull]
+        // Tried using ObjC 'nonnull' keyword as per SO article but didn't build
+        GLint swapInterval=0;
         [glContext setValues:&swapInterval forParameter:NSOpenGLContextParameterSwapInterval];
-	}
+    }
 
     GLint opacity = 1;
     [glContext setValues:&opacity forParameter:NSOpenGLCPSurfaceOpacity];
 
-	return self;
+    return self;
 }
 
 - (BOOL) rebuildContext
 {
-	return [self rebuildContextWithFormat:[self pixelFormat]];
+    return [self rebuildContextWithFormat:[self pixelFormat]];
 }
 
 - (BOOL) rebuildContextWithFormat:(NSOpenGLPixelFormat *)format
 {
-	NSOpenGLContext *ctx = [self openGLContext];
+    NSOpenGLContext *ctx = [self openGLContext];
 
-	[ctx clearDrawable];
-	[ctx initWithFormat:format shareContext:nil];
+    [ctx clearDrawable];
+    [ctx initWithFormat:format shareContext:nil];
 
-	if (ctx == nil)
-	{
-		NSLog(@"Failed to create OpenGL context!", nil);
-		return false;
-	}
+    if (ctx == nil)
+    {
+        NSLog(@"Failed to create OpenGL context!", nil);
+        return false;
+    }
 
-	[self setOpenGLContext:ctx];
-	[ctx setView:self];
-	[ctx makeCurrentContext];
-	return true;
+    [self setOpenGLContext:ctx];
+    [ctx setView:self];
+    [ctx makeCurrentContext];
+    return true;
 }
 
 #if LL_DARWIN
@@ -384,14 +384,14 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (CGLContextObj)getCGLContextObj
 {
-	NSOpenGLContext *ctx = [self openGLContext];
-	return (CGLContextObj)[ctx CGLContextObj];
+    NSOpenGLContext *ctx = [self openGLContext];
+    return (CGLContextObj)[ctx CGLContextObj];
 }
 
 - (CGLPixelFormatObj*)getCGLPixelFormatObj
 {
-	NSOpenGLPixelFormat *fmt = [self pixelFormat];
-	return (CGLPixelFormatObj*)[fmt	CGLPixelFormatObj];
+    NSOpenGLPixelFormat *fmt = [self pixelFormat];
+    return (CGLPixelFormatObj*)[fmt CGLPixelFormatObj];
 }
 
 // Various events can be intercepted by our view, thus not reaching our window.
@@ -436,29 +436,29 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) rightMouseDown:(NSEvent *)theEvent
 {
-	callRightMouseDown(mMousePos, [theEvent modifierFlags]);
+    callRightMouseDown(mMousePos, [theEvent modifierFlags]);
 }
 
 - (void) rightMouseUp:(NSEvent *)theEvent
 {
-	callRightMouseUp(mMousePos, [theEvent modifierFlags]);
+    callRightMouseUp(mMousePos, [theEvent modifierFlags]);
 }
 
 - (void)mouseMoved:(NSEvent *)theEvent
 {
     NSPoint dev_delta = [self convertPointToBacking:NSMakePoint([theEvent deltaX], [theEvent deltaY])];
 
-	float mouseDeltas[] = {
-		float(dev_delta.x),
-		float(dev_delta.y)
-	};
+    float mouseDeltas[] = {
+        float(dev_delta.x),
+        float(dev_delta.y)
+    };
 
-	callDeltaUpdate(mouseDeltas, 0);
+    callDeltaUpdate(mouseDeltas, 0);
 
     NSPoint mPoint = [self convertPointToBacking:[theEvent locationInWindow]];
-	mMousePos[0] = mPoint.x;
-	mMousePos[1] = mPoint.y;
-	callMouseMoved(mMousePos, 0);
+    mMousePos[0] = mPoint.x;
+    mMousePos[1] = mPoint.y;
+    callMouseMoved(mMousePos, 0);
 }
 
 // NSWindow doesn't trigger mouseMoved when the mouse is being clicked and dragged.
@@ -466,23 +466,23 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) mouseDragged:(NSEvent *)theEvent
 {
-	// Trust the deltas supplied by NSEvent.
-	// The old CoreGraphics APIs we previously relied on are now flagged as obsolete.
-	// NSEvent isn't obsolete, and provides us with the correct deltas.
+    // Trust the deltas supplied by NSEvent.
+    // The old CoreGraphics APIs we previously relied on are now flagged as obsolete.
+    // NSEvent isn't obsolete, and provides us with the correct deltas.
 
     NSPoint dev_delta = [self convertPointToBacking:NSMakePoint([theEvent deltaX], [theEvent deltaY])];
 
-	float mouseDeltas[] = {
-		float(dev_delta.x),
-		float(dev_delta.y)
-	};
+    float mouseDeltas[] = {
+        float(dev_delta.x),
+        float(dev_delta.y)
+    };
 
-	callDeltaUpdate(mouseDeltas, 0);
+    callDeltaUpdate(mouseDeltas, 0);
 
-	NSPoint mPoint = [self convertPointToBacking:[theEvent locationInWindow]];
-	mMousePos[0] = mPoint.x;
-	mMousePos[1] = mPoint.y;
-	callMouseDragged(mMousePos, 0);
+    NSPoint mPoint = [self convertPointToBacking:[theEvent locationInWindow]];
+    mMousePos[0] = mPoint.x;
+    mMousePos[1] = mPoint.y;
+    callMouseDragged(mMousePos, 0);
 }
 
 - (void) otherMouseDown:(NSEvent *)theEvent
@@ -497,29 +497,29 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) rightMouseDragged:(NSEvent *)theEvent
 {
-	[self mouseDragged:theEvent];
+    [self mouseDragged:theEvent];
 }
 
 - (void) otherMouseDragged:(NSEvent *)theEvent
 {
-	[self mouseDragged:theEvent];
+    [self mouseDragged:theEvent];
 }
 
 - (void) scrollWheel:(NSEvent *)theEvent
 {
-	callScrollMoved(-[theEvent deltaX], -[theEvent deltaY]);
+    callScrollMoved(-[theEvent deltaX], -[theEvent deltaY]);
 }
 
 - (void) mouseExited:(NSEvent *)theEvent
 {
-	callMouseExit();
+    callMouseExit();
 }
 
 - (void) keyUp:(NSEvent *)theEvent
 {
     NativeKeyEventData eventData = extractKeyDataFromKeyEvent(theEvent);
     eventData.mKeyEvent = NativeKeyEventData::KEYUP;
-	callKeyUp(&eventData, [theEvent keyCode], [theEvent modifierFlags]);
+    callKeyUp(&eventData, [theEvent keyCode], [theEvent modifierFlags]);
 }
 
 - (void) keyDown:(NSEvent *)theEvent
@@ -533,7 +533,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
     // Because flagsChange event handler misses event when other window is activated,
     // e.g. OS Window for upload something or Input Window...
     // mModifiers instance variable is for insertText: or insertText:replacementRange:  (by Pell Smit)
-	mModifiers = [theEvent modifierFlags];
+    mModifiers = [theEvent modifierFlags];
     NSString *str_no_modifiers = [theEvent charactersIgnoringModifiers];
     unichar ch = 0;
     if (str_no_modifiers.length)
@@ -561,8 +561,8 @@ attributedStringInfo getSegments(NSAttributedString *str)
 {
     NativeKeyEventData eventData = extractKeyDataFromModifierEvent(theEvent);
 
-	mModifiers = [theEvent modifierFlags];
-	callModifier([theEvent modifierFlags]);
+    mModifiers = [theEvent modifierFlags];
+    callModifier([theEvent modifierFlags]);
 
     NSInteger mask = 0;
     switch([theEvent keyCode])
@@ -603,69 +603,69 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (BOOL) acceptsFirstResponder
 {
-	return YES;
+    return YES;
 }
 
 - (NSDragOperation) draggingEntered:(id<NSDraggingInfo>)sender
 {
-	NSPasteboard *pboard;
+    NSPasteboard *pboard;
     NSDragOperation sourceDragMask;
 
-	sourceDragMask = [sender draggingSourceOperationMask];
+    sourceDragMask = [sender draggingSourceOperationMask];
 
-	pboard = [sender draggingPasteboard];
+    pboard = [sender draggingPasteboard];
 
     if ([[pboard types] containsObject:NSPasteboardTypeURL])
-	{
-		if (sourceDragMask & NSDragOperationLink) {
-			NSURL *fileUrl = [[pboard readObjectsForClasses:[NSArray arrayWithObject:[NSURL class]] options:[NSDictionary dictionary]] objectAtIndex:0];
-			mLastDraggedUrl = [[fileUrl absoluteString] UTF8String];
+    {
+        if (sourceDragMask & NSDragOperationLink) {
+            NSURL *fileUrl = [[pboard readObjectsForClasses:[NSArray arrayWithObject:[NSURL class]] options:[NSDictionary dictionary]] objectAtIndex:0];
+            mLastDraggedUrl = [[fileUrl absoluteString] UTF8String];
             return NSDragOperationLink;
         }
-	}
-	return NSDragOperationNone;
+    }
+    return NSDragOperationNone;
 }
 
 - (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender
 {
-	callHandleDragUpdated(mLastDraggedUrl);
+    callHandleDragUpdated(mLastDraggedUrl);
 
-	return NSDragOperationLink;
+    return NSDragOperationLink;
 }
 
 - (void) draggingExited:(id<NSDraggingInfo>)sender
 {
-	callHandleDragExited(mLastDraggedUrl);
+    callHandleDragExited(mLastDraggedUrl);
 }
 
 - (BOOL)prepareForDragOperation:(id < NSDraggingInfo >)sender
 {
-	return YES;
+    return YES;
 }
 
 - (BOOL) performDragOperation:(id<NSDraggingInfo>)sender
 {
-	callHandleDragDropped(mLastDraggedUrl);
-	return true;
+    callHandleDragDropped(mLastDraggedUrl);
+    return true;
 }
 
 - (BOOL)hasMarkedText
 {
-	return mHasMarkedText;
+    return mHasMarkedText;
 }
 
 - (NSRange)markedRange
 {
-	int range[2];
-	getPreeditMarkedRange(&range[0], &range[1]);
-	return NSMakeRange(range[0], range[1]);
+    int range[2];
+    getPreeditMarkedRange(&range[0], &range[1]);
+    return NSMakeRange(range[0], range[1]);
 }
 
 - (NSRange)selectedRange
 {
-	int range[2];
-	getPreeditSelectionRange(&range[0], &range[1]);
-	return NSMakeRange(range[0], range[1]);
+    int range[2];
+    getPreeditSelectionRange(&range[0], &range[1]);
+    return NSMakeRange(range[0], range[1]);
 }
 
 - (void)setMarkedText:(id)aString selectedRange:(NSRange)selectedRange replacementRange:(NSRange)replacementRange
@@ -751,21 +751,21 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void)unmarkText
 {
-	[[self inputContext] discardMarkedText];
-	resetPreedit();
-	mHasMarkedText = FALSE;
+    [[self inputContext] discardMarkedText];
+    resetPreedit();
+    mHasMarkedText = FALSE;
 }
 
 // We don't support attributed strings.
 - (NSArray *)validAttributesForMarkedText
 {
-	return [NSArray array];
+    return [NSArray array];
 }
 
 // See above.
 - (NSAttributedString *)attributedSubstringForProposedRange:(NSRange)aRange actualRange:(NSRangePointer)actualRange
 {
-	return nil;
+    return nil;
 }
 
 - (void)insertText:(id)insertString
@@ -778,9 +778,9 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void)insertText:(id)aString replacementRange:(NSRange)replacementRange
 {
-	// SL-19801 Special workaround for system emoji picker
-	if ([aString length] == 2)
-	{
+    // SL-19801 Special workaround for system emoji picker
+    if ([aString length] == 2)
+    {
         @try
         {
             uint32_t b0 = [aString characterAtIndex:0];
@@ -798,7 +798,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
             NSLog(@"Encountered an unsupported attributed character. Exception: %@ String: %@", e.name, aString);
             return;
         }
-	}
+    }
 
     @try
     {
@@ -831,36 +831,36 @@ attributedStringInfo getSegments(NSAttributedString *str)
     if (!(mModifiers & NSEventModifierFlagCommand) &&
         !(mModifiers & NSEventModifierFlagShift) &&
         !(mModifiers & NSEventModifierFlagOption))
-	{
-		callUnicodeCallback(13, 0);
-	} else {
-		callUnicodeCallback(13, mModifiers);
-	}
+    {
+        callUnicodeCallback(13, 0);
+    } else {
+        callUnicodeCallback(13, mModifiers);
+    }
 }
 
 - (NSUInteger)characterIndexForPoint:(NSPoint)aPoint
 {
-	return NSNotFound;
+    return NSNotFound;
 }
 
 - (NSRect)firstRectForCharacterRange:(NSRange)aRange actualRange:(NSRangePointer)actualRange
 {
-	float pos[4] = {0, 0, 0, 0};
-	getPreeditLocation(pos, mMarkedTextLength);
-	return NSMakeRect(pos[0], pos[1], pos[2], pos[3]);
+    float pos[4] = {0, 0, 0, 0};
+    getPreeditLocation(pos, mMarkedTextLength);
+    return NSMakeRect(pos[0], pos[1], pos[2], pos[3]);
 }
 
 - (void)doCommandBySelector:(SEL)aSelector
 {
-	if (aSelector == @selector(insertNewline:))
-	{
-		[self insertNewline:self];
-	}
+    if (aSelector == @selector(insertNewline:))
+    {
+        [self insertNewline:self];
+    }
 }
 
 - (BOOL)drawsVerticallyForCharacterAtIndex:(NSUInteger)charIndex
 {
-	return NO;
+    return NO;
 }
 
 - (void) allowMarkedTextInput:(bool)allowed
@@ -895,7 +895,7 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (void) setGLView:(LLOpenGLView *)view
 {
-	glview = view;
+    glview = view;
 }
 
 - (void)keyDown:(NSEvent *)theEvent
@@ -946,24 +946,24 @@ attributedStringInfo getSegments(NSAttributedString *str)
 
 - (id) init
 {
-	return self;
+    return self;
 }
 
 - (BOOL) becomeFirstResponder
 {
-	callFocus();
-	return true;
+    callFocus();
+    return true;
 }
 
 - (BOOL) resignFirstResponder
 {
-	callFocusLost();
-	return true;
+    callFocusLost();
+    return true;
 }
 
 - (void) close
 {
-	callQuitHandler();
+    callQuitHandler();
 }
 
 @end
diff --git a/indra/llwindow/llwindowmacosx-objc.mm b/indra/llwindow/llwindowmacosx-objc.mm
index 42cd95be5d..d902a82a3c 100644
--- a/indra/llwindow/llwindowmacosx-objc.mm
+++ b/indra/llwindow/llwindowmacosx-objc.mm
@@ -41,15 +41,15 @@
 
 int createNSApp(int argc, const char *argv[])
 {
-	return NSApplicationMain(argc, argv);
+    return NSApplicationMain(argc, argv);
 }
 
 void setupCocoa()
 {
-	static bool inited = false;
-	
-	if(!inited)
-	{
+    static bool inited = false;
+
+    if(!inited)
+    {
         @autoreleasepool {
             // The following prevents the Cocoa command line parser from trying to open 'unknown' arguements as documents.
             // ie. running './secondlife -set Language fr' would cause a pop-up saying can't open document 'fr'
@@ -57,8 +57,8 @@ void setupCocoa()
             [[NSUserDefaults standardUserDefaults] setObject:@"NO" forKey:@"NSTreatUnknownArgumentsAsOpen"];
         }
 
-		inited = true;
-	}
+        inited = true;
+    }
 }
 
 bool copyToPBoard(const unsigned short *str, unsigned int len)
@@ -66,7 +66,7 @@ bool copyToPBoard(const unsigned short *str, unsigned int len)
     @autoreleasepool {
         NSPasteboard *pboard = [NSPasteboard generalPasteboard];
         [pboard clearContents];
-        
+
         NSArray *contentsToPaste = [[[NSArray alloc] initWithObjects:[NSString stringWithCharacters:str length:len], nil] autorelease];
         return [pboard writeObjects:contentsToPaste];
     }
@@ -74,8 +74,8 @@ bool copyToPBoard(const unsigned short *str, unsigned int len)
 
 bool pasteBoardAvailable()
 {
-	NSArray *classArray = [NSArray arrayWithObject:[NSString class]];
-	return [[NSPasteboard generalPasteboard] canReadObjectForClasses:classArray options:[NSDictionary dictionary]];
+    NSArray *classArray = [NSArray arrayWithObject:[NSString class]];
+    return [[NSPasteboard generalPasteboard] canReadObjectForClasses:classArray options:[NSDictionary dictionary]];
 }
 
 unsigned short *copyFromPBoard()
@@ -111,55 +111,55 @@ CursorRef createImageCursor(const char *fullpath, int hotspotX, int hotspotY)
           hotSpot:NSMakePoint(hotspotX, hotspotY)
          ] retain];
     }
-	
-	return (CursorRef)cursor;
+
+    return (CursorRef)cursor;
 }
 
 void setArrowCursor()
 {
-	NSCursor *cursor = [NSCursor arrowCursor];
-	[NSCursor unhide];
-	[cursor set];
+    NSCursor *cursor = [NSCursor arrowCursor];
+    [NSCursor unhide];
+    [cursor set];
 }
 
 void setIBeamCursor()
 {
-	NSCursor *cursor = [NSCursor IBeamCursor];
-	[cursor set];
+    NSCursor *cursor = [NSCursor IBeamCursor];
+    [cursor set];
 }
 
 void setPointingHandCursor()
 {
-	NSCursor *cursor = [NSCursor pointingHandCursor];
-	[cursor set];
+    NSCursor *cursor = [NSCursor pointingHandCursor];
+    [cursor set];
 }
 
 void setCopyCursor()
 {
-	NSCursor *cursor = [NSCursor dragCopyCursor];
-	[cursor set];
+    NSCursor *cursor = [NSCursor dragCopyCursor];
+    [cursor set];
 }
 
 void setCrossCursor()
 {
-	NSCursor *cursor = [NSCursor crosshairCursor];
-	[cursor set];
+    NSCursor *cursor = [NSCursor crosshairCursor];
+    [cursor set];
 }
 
 void setNotAllowedCursor()
 {
-	NSCursor *cursor = [NSCursor operationNotAllowedCursor];
-	[cursor set];
+    NSCursor *cursor = [NSCursor operationNotAllowedCursor];
+    [cursor set];
 }
 
 void hideNSCursor()
 {
-	[NSCursor hide];
+    [NSCursor hide];
 }
 
 void showNSCursor()
 {
-	[NSCursor unhide];
+    [NSCursor unhide];
 }
 
 #if LL_DARWIN
@@ -179,42 +179,42 @@ bool isCGCursorVisible()
 
 void hideNSCursorTillMove(bool hide)
 {
-	[NSCursor setHiddenUntilMouseMoves:hide];
+    [NSCursor setHiddenUntilMouseMoves:hide];
 }
 
 // This is currently unused, since we want all our cursors to persist for the life of the app, but I've included it for completeness.
 OSErr releaseImageCursor(CursorRef ref)
 {
-	if( ref != NULL )
-	{
+    if( ref != NULL )
+    {
         @autoreleasepool {
             NSCursor *cursor = (NSCursor*)ref;
             [cursor autorelease];
         }
-	}
-	else
-	{
-		return paramErr;
-	}
-	
-	return noErr;
+    }
+    else
+    {
+        return paramErr;
+    }
+
+    return noErr;
 }
 
 OSErr setImageCursor(CursorRef ref)
 {
-	if( ref != NULL )
-	{
+    if( ref != NULL )
+    {
         @autoreleasepool {
             NSCursor *cursor = (NSCursor*)ref;
             [cursor set];
         }
-	}
-	else
-	{
-		return paramErr;
-	}
-	
-	return noErr;
+    }
+    else
+    {
+        return paramErr;
+    }
+
+    return noErr;
 }
 
 // Now for some unholy juggling between generic pointers and casting them to Obj-C objects!
@@ -222,46 +222,46 @@ OSErr setImageCursor(CursorRef ref)
 
 NSWindowRef createNSWindow(int x, int y, int width, int height)
 {
-	LLNSWindow *window = [[LLNSWindow alloc]initWithContentRect:NSMakeRect(x, y, width, height)
+    LLNSWindow *window = [[LLNSWindow alloc]initWithContentRect:NSMakeRect(x, y, width, height)
                                                       styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskResizable | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable
                                                         backing:NSBackingStoreBuffered defer:NO];
-	[window makeKeyAndOrderFront:nil];
-	[window setAcceptsMouseMovedEvents:TRUE];
+    [window makeKeyAndOrderFront:nil];
+    [window setAcceptsMouseMovedEvents:TRUE];
     [window setRestorable:FALSE]; // Viewer manages state from own settings
-	return window;
+    return window;
 }
 
 GLViewRef createOpenGLView(NSWindowRef window, unsigned int samples, bool vsync)
 {
-	LLOpenGLView *glview = [[LLOpenGLView alloc]initWithFrame:[(LLNSWindow*)window frame] withSamples:samples andVsync:vsync];
-	[(LLNSWindow*)window setContentView:glview];
-	return glview;
+    LLOpenGLView *glview = [[LLOpenGLView alloc]initWithFrame:[(LLNSWindow*)window frame] withSamples:samples andVsync:vsync];
+    [(LLNSWindow*)window setContentView:glview];
+    return glview;
 }
 
 void glSwapBuffers(void* context)
 {
-	[(NSOpenGLContext*)context flushBuffer];
+    [(NSOpenGLContext*)context flushBuffer];
 }
 
 CGLContextObj getCGLContextObj(GLViewRef view)
 {
-	return [(LLOpenGLView *)view getCGLContextObj];
+    return [(LLOpenGLView *)view getCGLContextObj];
 }
 
 CGLPixelFormatObj* getCGLPixelFormatObj(NSWindowRef window)
 {
-	LLOpenGLView *glview = [(LLNSWindow*)window contentView];
-	return [glview getCGLPixelFormatObj];
+    LLOpenGLView *glview = [(LLNSWindow*)window contentView];
+    return [glview getCGLPixelFormatObj];
 }
 
 unsigned long getVramSize(GLViewRef view)
 {
-	return [(LLOpenGLView *)view getVramSize];
+    return [(LLOpenGLView *)view getVramSize];
 }
 
 float getDeviceUnitSize(GLViewRef view)
 {
-	return [(LLOpenGLView*)view convertSizeToBacking:NSMakeSize(1, 1)].width;
+    return [(LLOpenGLView*)view convertSizeToBacking:NSMakeSize(1, 1)].width;
 }
 
 CGRect getContentViewRect(NSWindowRef window)
@@ -276,48 +276,48 @@ CGRect getBackingViewRect(NSWindowRef window, GLViewRef view)
 
 void getWindowSize(NSWindowRef window, float* size)
 {
-	NSRect frame = [(LLNSWindow*)window frame];
-	size[0] = frame.origin.x;
-	size[1] = frame.origin.y;
-	size[2] = frame.size.width;
-	size[3] = frame.size.height;
+    NSRect frame = [(LLNSWindow*)window frame];
+    size[0] = frame.origin.x;
+    size[1] = frame.origin.y;
+    size[2] = frame.size.width;
+    size[3] = frame.size.height;
 }
 
 void setWindowSize(NSWindowRef window, int width, int height)
 {
-	NSRect frame = [(LLNSWindow*)window frame];
-	frame.size.width = width;
-	frame.size.height = height;
-	[(LLNSWindow*)window setFrame:frame display:TRUE];
+    NSRect frame = [(LLNSWindow*)window frame];
+    frame.size.width = width;
+    frame.size.height = height;
+    [(LLNSWindow*)window setFrame:frame display:TRUE];
 }
 
 void setWindowPos(NSWindowRef window, float* pos)
 {
-	NSPoint point;
-	point.x = pos[0];
-	point.y = pos[1];
-	[(LLNSWindow*)window setFrameOrigin:point];
+    NSPoint point;
+    point.x = pos[0];
+    point.y = pos[1];
+    [(LLNSWindow*)window setFrameOrigin:point];
 }
 
 void getCursorPos(NSWindowRef window, float* pos)
 {
-	NSPoint mLoc;
-	mLoc = [(LLNSWindow*)window mouseLocationOutsideOfEventStream];
-	pos[0] = mLoc.x;
-	pos[1] = mLoc.y;
+    NSPoint mLoc;
+    mLoc = [(LLNSWindow*)window mouseLocationOutsideOfEventStream];
+    pos[0] = mLoc.x;
+    pos[1] = mLoc.y;
 }
 
 void makeWindowOrderFront(NSWindowRef window)
 {
-	[(LLNSWindow*)window makeKeyAndOrderFront:nil];
+    [(LLNSWindow*)window makeKeyAndOrderFront:nil];
 }
 
 void convertScreenToWindow(NSWindowRef window, float *coord)
 {
     NSRect point = NSMakeRect(coord[0], coord[1], 0,0);
-	point = [(LLNSWindow*)window convertRectFromScreen:point];
-	coord[0] = point.origin.x;
-	coord[1] = point.origin.y;
+    point = [(LLNSWindow*)window convertRectFromScreen:point];
+    coord[0] = point.origin.x;
+    coord[1] = point.origin.y;
 }
 
 void convertRectToScreen(NSWindowRef window, float *coord)
@@ -325,21 +325,21 @@ void convertRectToScreen(NSWindowRef window, float *coord)
     NSRect rect = NSMakeRect(coord[0], coord[1], coord[2], coord[3]);;
     rect = [(LLNSWindow*)window convertRectToScreen:rect];
 
-	coord[0] = rect.origin.x;
-	coord[1] = rect.origin.y;
-	coord[2] = rect.size.width;
-	coord[3] = rect.size.height;
+    coord[0] = rect.origin.x;
+    coord[1] = rect.origin.y;
+    coord[2] = rect.size.width;
+    coord[3] = rect.size.height;
 }
 
 void convertRectFromScreen(NSWindowRef window, float *coord)
 {
-	NSRect point = NSMakeRect(coord[0], coord[1], coord[2], coord[3]);
-	point = [(LLNSWindow*)window convertRectFromScreen:point];
-	
-	coord[0] = point.origin.x;
-	coord[1] = point.origin.y;
-	coord[2] = point.size.width;
-	coord[3] = point.size.height;
+    NSRect point = NSMakeRect(coord[0], coord[1], coord[2], coord[3]);
+    point = [(LLNSWindow*)window convertRectFromScreen:point];
+
+    coord[0] = point.origin.x;
+    coord[1] = point.origin.y;
+    coord[2] = point.size.width;
+    coord[3] = point.size.height;
 }
 
 void convertWindowToScreen(NSWindowRef window, float *coord)
@@ -353,24 +353,24 @@ void convertWindowToScreen(NSWindowRef window, float *coord)
 
 void closeWindow(NSWindowRef window)
 {
-	[(LLNSWindow*)window close];
-	[(LLNSWindow*)window release];
+    [(LLNSWindow*)window close];
+    [(LLNSWindow*)window release];
 }
 
 void removeGLView(GLViewRef view)
 {
-	[(LLOpenGLView*)view clearGLContext];
-	[(LLOpenGLView*)view removeFromSuperview];
+    [(LLOpenGLView*)view clearGLContext];
+    [(LLOpenGLView*)view removeFromSuperview];
 }
 
 void setupInputWindow(NSWindowRef window, GLViewRef glview)
 {
-	[[(LLAppDelegate*)[NSApp delegate] inputView] setGLView:(LLOpenGLView*)glview];
+    [[(LLAppDelegate*)[NSApp delegate] inputView] setGLView:(LLOpenGLView*)glview];
 }
 
 void commitCurrentPreedit(GLViewRef glView)
 {
-	[(LLOpenGLView*)glView commitCurrentPreedit];
+    [(LLOpenGLView*)glView commitCurrentPreedit];
 }
 
 void allowDirectMarkedTextInput(bool allow, GLViewRef glView)
@@ -380,20 +380,20 @@ void allowDirectMarkedTextInput(bool allow, GLViewRef glView)
 
 NSWindowRef getMainAppWindow()
 {
-	LLNSWindow *winRef = [(LLAppDelegate*)[[NSApplication sharedApplication] delegate] window];
-	
-	[winRef setAcceptsMouseMovedEvents:TRUE];
-	return winRef;
+    LLNSWindow *winRef = [(LLAppDelegate*)[[NSApplication sharedApplication] delegate] window];
+
+    [winRef setAcceptsMouseMovedEvents:TRUE];
+    return winRef;
 }
 
 void makeFirstResponder(NSWindowRef window, GLViewRef view)
 {
-	[(LLNSWindow*)window makeFirstResponder:(LLOpenGLView*)view];
+    [(LLNSWindow*)window makeFirstResponder:(LLOpenGLView*)view];
 }
 
 void requestUserAttention()
 {
-	[[NSApplication sharedApplication] requestUserAttention:NSInformationalRequest];
+    [[NSApplication sharedApplication] requestUserAttention:NSInformationalRequest];
 }
 
 long showAlert(std::string text, std::string title, int type)
@@ -401,7 +401,7 @@ long showAlert(std::string text, std::string title, int type)
     long ret = 0;
     @autoreleasepool {
         NSAlert *alert = [[[NSAlert alloc] init] autorelease];
-        
+
         [alert setMessageText:[NSString stringWithCString:title.c_str() encoding:[NSString defaultCStringEncoding]]];
         [alert setInformativeText:[NSString stringWithCString:text.c_str() encoding:[NSString defaultCStringEncoding]]];
         if (type == 0)
@@ -418,7 +418,7 @@ long showAlert(std::string text, std::string title, int type)
         }
         ret = [alert runModal];
     }
-    
+
     if (ret == NSAlertFirstButtonReturn)
     {
         if (type == 1)
@@ -438,7 +438,7 @@ long showAlert(std::string text, std::string title, int type)
             ret = 1;
         }
     }
-    
+
     return ret;
 }
 
@@ -451,5 +451,5 @@ long showAlert(std::string text, std::string title, int type)
 
 unsigned int getModifiers()
 {
-	return [NSEvent modifierFlags];
+    return [NSEvent modifierFlags];
 }
diff --git a/indra/newview/CMakeLists.txt b/indra/newview/CMakeLists.txt
index d1ea2773fe..88e12e07cf 100644
--- a/indra/newview/CMakeLists.txt
+++ b/indra/newview/CMakeLists.txt
@@ -58,7 +58,7 @@ if (ENABLE_MEDIA_PLUGINS)
     include(CEFPlugin)
 endif ()
 
-if (NOT HAVOK_TPV)
+if (HAVOK)
    # When using HAVOK_TPV, the library is precompiled, so no need for this
 
    # Stub and probably havok lib itself is a hack, autobuild loads a 3p that really is a source tarball
@@ -84,7 +84,7 @@ if (NOT HAVOK_TPV)
         target_compile_options( llphysicsextensions  PRIVATE -Wno-unused-local-typedef)
       endif (DARWIN)
    endif()
-endif (NOT HAVOK_TPV)
+endif ()
 
 set(viewer_SOURCE_FILES
     gltfscenemanager.cpp
@@ -2089,13 +2089,30 @@ elseif (DARWIN)
         PROPERTIES
         RESOURCE SecondLife.xib
         LINK_FLAGS_RELEASE "${LINK_FLAGS_RELEASE} -Xlinker -dead_strip"
-        # arch specific flags for universal builds: https://stackoverflow.com/a/77942065
-        XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=x86_64]  "$(inherited) -DLLPHYSICSEXTENSIONS_USE_FULL"
-        XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=arm64]   "$(inherited) -DLLPHYSICSEXTENSIONS_USE_STUB"
-        # only generate the .MAP file for llphysicsextensions_tpv on x86_64
-        XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=x86_64] "$(inherited) -L${CMAKE_CURRENT_BINARY_DIR}/llphysicsextensions/$<IF:$<BOOL:${LL_GENERATOR_IS_MULTI_CONFIG}>,$<CONFIG>,${CMAKE_CFG_INTDIR}>/ -lllphysicsextensions  -Xlinker -map -Xlinker ${CMAKE_CURRENT_BINARY_DIR}/${VIEWER_BINARY_NAME}.MAP"
-        XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=arm64]  "$(inherited) -L${CMAKE_CURRENT_BINARY_DIR}/llphysicsextensionsstub/$<IF:$<BOOL:${LL_GENERATOR_IS_MULTI_CONFIG}>,$<CONFIG>,${CMAKE_CFG_INTDIR}>/ -lllphysicsextensionsstub"
         )
+    if(HAVOK)
+      set_target_properties(${VIEWER_BINARY_NAME}
+          PROPERTIES
+          # arch specific flags for universal builds: https://stackoverflow.com/a/77942065
+          XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=x86_64]  "$(inherited) -DLLPHYSICSEXTENSIONS_USE_FULL -DLL_HAVOK=1"
+          XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=arm64]   "$(inherited) -DLLPHYSICSEXTENSIONS_USE_STUB"
+          # only generate the .MAP file for llphysicsextensions_tpv on x86_64
+          XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=x86_64] "$(inherited) -L${CMAKE_CURRENT_BINARY_DIR}/llphysicsextensions/$<IF:$<BOOL:${LL_GENERATOR_IS_MULTI_CONFIG}>,$<CONFIG>,${CMAKE_CFG_INTDIR}>/ -lllphysicsextensions  -Xlinker -map -Xlinker ${CMAKE_CURRENT_BINARY_DIR}/${VIEWER_BINARY_NAME}.MAP"
+          XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=arm64]  "$(inherited) -L${CMAKE_BINARY_DIR}/llphysicsextensionsos/$<IF:$<BOOL:${LL_GENERATOR_IS_MULTI_CONFIG}>,$<CONFIG>,${CMAKE_CFG_INTDIR}>/ -lllphysicsextensionsos"
+          )
+    elseif(HAVOK_TPV)
+      set_target_properties(${VIEWER_BINARY_NAME}
+          PROPERTIES
+          # arch specific flags for universal builds: https://stackoverflow.com/a/77942065
+          XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=x86_64]  "$(inherited) -DLLPHYSICSEXTENSIONS_USE_FULL -DLL_HAVOK=1"
+          XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=arm64]   "$(inherited) -DLLPHYSICSEXTENSIONS_USE_STUB"
+          # only generate the .MAP file for llphysicsextensions_tpv on x86_64
+          XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=x86_64] "$(inherited) -L${ARCH_PREBUILT_DIRS}/ -lllphysicsextensions_tpv"
+          XCODE_ATTRIBUTE_OTHER_LDFLAGS[arch=arm64]  "$(inherited) -L${CMAKE_BINARY_DIR}/llphysicsextensionsos/$<IF:$<BOOL:${LL_GENERATOR_IS_MULTI_CONFIG}>,$<CONFIG>,${CMAKE_CFG_INTDIR}>/ -lllphysicsextensionsos"
+          )
+    else()
+      target_link_libraries(${VIEWER_BINARY_NAME} llphysicsextensionsos)
+    endif()
 else (WINDOWS)
         # Linux
     set_target_properties(${VIEWER_BINARY_NAME}
diff --git a/indra/newview/llappdelegate-objc.mm b/indra/newview/llappdelegate-objc.mm
index b8fd3dc189..af18dca185 100644
--- a/indra/newview/llappdelegate-objc.mm
+++ b/indra/newview/llappdelegate-objc.mm
@@ -57,42 +57,42 @@
 
 - (void) applicationDidFinishLaunching:(NSNotification *)notification
 {
-	// Call constructViewer() first so our logging subsystem is in place. This
-	// risks missing crashes in the LLAppViewerMacOSX constructor, but for
-	// present purposes it's more important to get the startup sequence
-	// properly logged.
-	// Someday I would like to modify the logging system so that calls before
-	// it's initialized are cached in a std::ostringstream and then, once it's
-	// initialized, "played back" into whatever handlers have been set up.
-	constructViewer();
+    // Call constructViewer() first so our logging subsystem is in place. This
+    // risks missing crashes in the LLAppViewerMacOSX constructor, but for
+    // present purposes it's more important to get the startup sequence
+    // properly logged.
+    // Someday I would like to modify the logging system so that calls before
+    // it's initialized are cached in a std::ostringstream and then, once it's
+    // initialized, "played back" into whatever handlers have been set up.
+    constructViewer();
 
 #if defined(LL_BUGSPLAT)
     infos("bugsplat setup");
-	// Engage BugsplatStartupManager *before* calling initViewer() to handle
-	// any crashes during initialization.
-	// https://www.bugsplat.com/docs/platforms/os-x#initialization
-	[BugsplatStartupManager sharedManager].autoSubmitCrashReport = YES;
-	[BugsplatStartupManager sharedManager].askUserDetails = NO;
-	[BugsplatStartupManager sharedManager].delegate = self;
-	[[BugsplatStartupManager sharedManager] start];
+    // Engage BugsplatStartupManager *before* calling initViewer() to handle
+    // any crashes during initialization.
+    // https://www.bugsplat.com/docs/platforms/os-x#initialization
+    [BugsplatStartupManager sharedManager].autoSubmitCrashReport = YES;
+    [BugsplatStartupManager sharedManager].askUserDetails = NO;
+    [BugsplatStartupManager sharedManager].delegate = self;
+    [[BugsplatStartupManager sharedManager] start];
 #endif
     infos("post-bugsplat setup");
 
-	frameTimer = nil;
+    frameTimer = nil;
 
-	[self languageUpdated];
+    [self languageUpdated];
 
-	if (initViewer())
-	{
-		// Set up recurring calls to oneFrame (repeating timer with timeout 0)
-		// until applicationShouldTerminate.
-		frameTimer = [NSTimer scheduledTimerWithTimeInterval:0.0 target:self
-							  selector:@selector(oneFrame) userInfo:nil repeats:YES];
-	} else {
-		exit(0);
-	}
+    if (initViewer())
+    {
+        // Set up recurring calls to oneFrame (repeating timer with timeout 0)
+        // until applicationShouldTerminate.
+        frameTimer = [NSTimer scheduledTimerWithTimeInterval:0.0 target:self
+                              selector:@selector(oneFrame) userInfo:nil repeats:YES];
+    } else {
+        exit(0);
+    }
 
-	[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(languageUpdated) name:@"NSTextInputContextKeyboardSelectionDidChangeNotification" object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(languageUpdated) name:@"NSTextInputContextKeyboardSelectionDidChangeNotification" object:nil];
 
  //   [[NSAppleEventManager sharedAppleEventManager] setEventHandler:self andSelector:@selector(handleGetURLEvent:withReplyEvent:) forEventClass:kInternetEventClass andEventID:kAEGetURL];
 }
@@ -110,74 +110,74 @@
 
 - (void) applicationDidBecomeActive:(NSNotification *)notification
 {
-	callWindowFocus();
+    callWindowFocus();
 }
 
 - (void) applicationDidResignActive:(NSNotification *)notification
 {
-	callWindowUnfocus();
+    callWindowUnfocus();
 }
 
 - (void) applicationDidHide:(NSNotification *)notification
 {
-	callWindowHide();
+    callWindowHide();
 }
 
 - (void) applicationDidUnhide:(NSNotification *)notification
 {
-	callWindowUnhide();
+    callWindowUnhide();
 }
 
 - (NSApplicationTerminateReply) applicationShouldTerminate:(NSApplication *)sender
 {
-	// run one frame to assess state
-	if (!pumpMainLoop())
-	{
-		// pumpMainLoop() returns true when done, false if it wants to be
-		// called again. Since it returned false, do not yet cancel
-		// frameTimer.
-		handleQuit();
-		[[NSApplication sharedApplication] stopModal];
-		return NSTerminateCancel;
-	} else {
-		// pumpMainLoop() returned true: it's done. Okay, done with frameTimer.
-		[frameTimer release];
-		cleanupViewer();
-		return NSTerminateNow;
-	}
+    // run one frame to assess state
+    if (!pumpMainLoop())
+    {
+        // pumpMainLoop() returns true when done, false if it wants to be
+        // called again. Since it returned false, do not yet cancel
+        // frameTimer.
+        handleQuit();
+        [[NSApplication sharedApplication] stopModal];
+        return NSTerminateCancel;
+    } else {
+        // pumpMainLoop() returned true: it's done. Okay, done with frameTimer.
+        [frameTimer release];
+        cleanupViewer();
+        return NSTerminateNow;
+    }
 }
 
 - (void) oneFrame
 {
-	bool appExiting = pumpMainLoop();
-	if (appExiting)
-	{
-		// Once pumpMainLoop() reports that we're done, cancel frameTimer:
-		// stop the repetitive calls.
-		[frameTimer release];
-		[[NSApplication sharedApplication] terminate:self];
-	}
+    bool appExiting = pumpMainLoop();
+    if (appExiting)
+    {
+        // Once pumpMainLoop() reports that we're done, cancel frameTimer:
+        // stop the repetitive calls.
+        [frameTimer release];
+        [[NSApplication sharedApplication] terminate:self];
+    }
 }
 
 - (void) showInputWindow:(bool)show withEvent:(NSEvent*)textEvent
 {
-	if (![self romanScript])
-	{
-		if (show)
-		{
-			NSLog(@"Showing input window.");
-			[inputWindow makeKeyAndOrderFront:inputWindow];
+    if (![self romanScript])
+    {
+        if (show)
+        {
+            NSLog(@"Showing input window.");
+            [inputWindow makeKeyAndOrderFront:inputWindow];
             if (textEvent != nil)
             {
                 [[inputView inputContext] discardMarkedText];
                 [[inputView inputContext] handleEvent:textEvent];
             }
-		} else {
-			NSLog(@"Hiding input window.");
-			[inputWindow orderOut:inputWindow];
-			[window makeKeyAndOrderFront:window];
-		}
-	}
+        } else {
+            NSLog(@"Hiding input window.");
+            [inputWindow orderOut:inputWindow];
+            [window makeKeyAndOrderFront:window];
+        }
+    }
 }
 
 // This will get called multiple times by NSNotificationCenter.
@@ -187,15 +187,15 @@
 
 - (void) languageUpdated
 {
-	TISInputSourceRef currentInput = TISCopyCurrentKeyboardInputSource();
-	CFArrayRef languages = (CFArrayRef)TISGetInputSourceProperty(currentInput, kTISPropertyInputSourceLanguages);
-	
+    TISInputSourceRef currentInput = TISCopyCurrentKeyboardInputSource();
+    CFArrayRef languages = (CFArrayRef)TISGetInputSourceProperty(currentInput, kTISPropertyInputSourceLanguages);
+
 #if 0 // In the event of ever needing to add new language sources, change this to 1 and watch the terminal for "languages:"
-	NSLog(@"languages: %@", TISGetInputSourceProperty(currentInput, kTISPropertyInputSourceLanguages));
+    NSLog(@"languages: %@", TISGetInputSourceProperty(currentInput, kTISPropertyInputSourceLanguages));
 #endif
-	
-	// Typically the language we want is going to be the very first result in the array.
-	currentInputLanguage = (NSString*)CFArrayGetValueAtIndex(languages, 0);
+
+    // Typically the language we want is going to be the very first result in the array.
+    currentInputLanguage = (NSString*)CFArrayGetValueAtIndex(languages, 0);
 }
 
 - (bool) romanScript
@@ -209,7 +209,7 @@
             return false;
         }
     }
-    
+
     return true;
 }
 
@@ -313,11 +313,11 @@ struct AttachmentInfo
 
     // We "happen to know" that info[0].basename is "SecondLife.old" -- due to
     // the fact that BugsplatMac only notices a crash during the viewer run
-    // following the crash. 
+    // following the crash.
     // The Bugsplat service doesn't respect the MIME type above when returning
     // the log data to a browser, so take this opportunity to rename the file
     // from <base>.old to <base>_log.txt
-    info[0].basename = 
+    info[0].basename =
         boost::filesystem::path(info[0].pathname).stem().string() + "_log.txt";
     infos("attachmentsForBugsplatStartupManager attaching log " + info[0].basename);
 
@@ -373,7 +373,7 @@ struct AttachmentInfo
 {
     [super sendEvent:event];
     if ([event type] == NSEventTypeKeyUp && ([event modifierFlags] & NSEventModifierFlagCommand))
-    {   
+    {
         [[self keyWindow] sendEvent:event];
     }
 }
diff --git a/indra/newview/llappviewer.cpp b/indra/newview/llappviewer.cpp
index f7dc7f0895..c34441932d 100644
--- a/indra/newview/llappviewer.cpp
+++ b/indra/newview/llappviewer.cpp
@@ -2459,7 +2459,6 @@ void LLAppViewer::initLoggingAndGetLastDuration()
         if (gDirUtilp->fileExists(user_data_path_cef_log))
         {
             std::string user_data_path_cef_old = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "cef.old");
-            LLFile::remove(user_data_path_cef_old, ENOENT);
             LLFile::rename(user_data_path_cef_log, user_data_path_cef_old);
         }
     }
diff --git a/indra/newview/llappviewermacosx-objc.mm b/indra/newview/llappviewermacosx-objc.mm
index 2ea3f2f171..96a6bc6edc 100644
--- a/indra/newview/llappviewermacosx-objc.mm
+++ b/indra/newview/llappviewermacosx-objc.mm
@@ -5,27 +5,27 @@
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2010, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
- */ 
+ */
 
 #if !defined LL_DARWIN
-	#error "Use only with macOS"
+    #error "Use only with macOS"
 #endif
 
 #import <Cocoa/Cocoa.h>
diff --git a/indra/newview/llfilepicker_mac.mm b/indra/newview/llfilepicker_mac.mm
index 978069457c..6cb7c4ad51 100644
--- a/indra/newview/llfilepicker_mac.mm
+++ b/indra/newview/llfilepicker_mac.mm
@@ -1,25 +1,25 @@
-/** 
+/**
  * @file llfilepicker_mac.cpp
  * @brief OS-specific file picker
  *
  * $LicenseInfo:firstyear=2001&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2010, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
@@ -32,15 +32,15 @@
 NSOpenPanel *init_panel(const std::vector<std::string>* allowed_types, unsigned int flags)
 {
     int i;
-    
+
     NSOpenPanel *panel = [NSOpenPanel openPanel];
     NSMutableArray *fileTypes = nil;
-    
-    
+
+
     if ( allowed_types && !allowed_types->empty())
     {
         fileTypes = [[NSMutableArray alloc] init];
-        
+
         for (i=0;i<allowed_types->size();++i)
         {
             [fileTypes addObject:
@@ -48,7 +48,7 @@ NSOpenPanel *init_panel(const std::vector<std::string>* allowed_types, unsigned
                                 encoding:[NSString defaultCStringEncoding]]];
         }
     }
-        
+
     //[panel setMessage:@"Import one or more files or directories."];
     [panel setAllowsMultipleSelection: ( (flags & F_MULTIPLE)?true:false ) ];
     [panel setCanChooseDirectories: ( (flags & F_DIRECTORY)?true:false ) ];
@@ -56,7 +56,7 @@ NSOpenPanel *init_panel(const std::vector<std::string>* allowed_types, unsigned
     [panel setResolvesAliases: true];
     [panel setCanChooseFiles: ( (flags & F_FILE)?true:false )];
     [panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
-    
+
     if (fileTypes)
     {
         [panel setAllowedFileTypes:fileTypes];
@@ -77,7 +77,7 @@ std::unique_ptr<std::vector<std::string>> doLoadDialog(const std::vector<std::st
     std::unique_ptr<std::vector<std::string>> outfiles;
 
     @autoreleasepool
-	{
+    {
         int result;
         //Aura TODO:  We could init a small window and release it at the end of this routine
         //for a modeless interface.
@@ -85,17 +85,17 @@ std::unique_ptr<std::vector<std::string>> doLoadDialog(const std::vector<std::st
         NSOpenPanel *panel = init_panel(allowed_types,flags);
 
         result = [panel runModal];
-        
+
         if (result == NSModalResponseOK)
         {
             NSArray *filesToOpen = [panel URLs];
             int i, count = [filesToOpen count];
-            
+
             if (count > 0)
             {
                 outfiles.reset(new std::vector<std::string>);
             }
-            
+
             for (i=0; i<count; i++) {
                 NSString *aFile = [[filesToOpen objectAtIndex:i] path];
                 std::string afilestr = std::string([aFile UTF8String]);
@@ -113,11 +113,11 @@ void doLoadDialogModeless(const std::vector<std::string>* allowed_types,
 {
 
     @autoreleasepool
-	{
+    {
         // Note: might need to return and save this panel
         // so that it does not close immediately
         NSOpenPanel *panel = init_panel(allowed_types,flags);
-    
+
         [panel beginWithCompletionHandler:^(NSModalResponse result)
         {
             std::vector<std::string> outfiles;
@@ -125,10 +125,10 @@ void doLoadDialogModeless(const std::vector<std::string>* allowed_types,
             {
                 NSArray *filesToOpen = [panel URLs];
                 int i, count = [filesToOpen count];
-                
+
                 if (count > 0)
                 {
-                    
+
                     for (i=0; i<count; i++) {
                         NSString *aFile = [[filesToOpen objectAtIndex:i] path];
                         std::string *afilestr = new std::string([aFile UTF8String]);
@@ -149,7 +149,7 @@ void doLoadDialogModeless(const std::vector<std::string>* allowed_types,
     }
 }
 
-std::unique_ptr<std::string> doSaveDialog(const std::string* file, 
+std::unique_ptr<std::string> doSaveDialog(const std::string* file,
                   const std::string* type,
                   const std::string* creator,
                   const std::string* extension,
@@ -157,18 +157,18 @@ std::unique_ptr<std::string> doSaveDialog(const std::string* file,
 {
     std::unique_ptr<std::string> outfile;
     @autoreleasepool
-	{
+    {
         NSSavePanel *panel = [NSSavePanel savePanel];
-        
+
         NSString *extensionns = [NSString stringWithCString:extension->c_str() encoding:[NSString defaultCStringEncoding]];
         NSArray *fileType = [extensionns componentsSeparatedByString:@","];
-        
+
         //[panel setMessage:@"Save Image File"];
         [panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
         [panel setCanSelectHiddenExtension:true];
         [panel setAllowedFileTypes:fileType];
         NSString *fileName = [NSString stringWithCString:file->c_str() encoding:[NSString defaultCStringEncoding]];
-        
+
         NSURL* url = [NSURL fileURLWithPath:fileName];
         [panel setNameFieldStringValue: fileName];
         [panel setDirectoryURL: url];
@@ -193,39 +193,39 @@ void doSaveDialogModeless(const std::string* file,
                   void *userdata)
 {
     @autoreleasepool {
-		NSSavePanel *panel = [NSSavePanel savePanel];
-    
-		NSString *extensionns = [NSString stringWithCString:extension->c_str() encoding:[NSString defaultCStringEncoding]];
-		NSArray *fileType = [extensionns componentsSeparatedByString:@","];
-    
-		//[panel setMessage:@"Save Image File"];
-		[panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
-		[panel setCanSelectHiddenExtension:true];
-		[panel setAllowedFileTypes:fileType];
-		NSString *fileName = [NSString stringWithCString:file->c_str() encoding:[NSString defaultCStringEncoding]];
-    
-		NSURL* url = [NSURL fileURLWithPath:fileName];
-		[panel setNameFieldStringValue: fileName];
-		[panel setDirectoryURL: url];
-    
-    
-		[panel beginWithCompletionHandler:^(NSModalResponse result)
-		{
+        NSSavePanel *panel = [NSSavePanel savePanel];
+
+        NSString *extensionns = [NSString stringWithCString:extension->c_str() encoding:[NSString defaultCStringEncoding]];
+        NSArray *fileType = [extensionns componentsSeparatedByString:@","];
+
+        //[panel setMessage:@"Save Image File"];
+        [panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
+        [panel setCanSelectHiddenExtension:true];
+        [panel setAllowedFileTypes:fileType];
+        NSString *fileName = [NSString stringWithCString:file->c_str() encoding:[NSString defaultCStringEncoding]];
+
+        NSURL* url = [NSURL fileURLWithPath:fileName];
+        [panel setNameFieldStringValue: fileName];
+        [panel setDirectoryURL: url];
+
+
+        [panel beginWithCompletionHandler:^(NSModalResponse result)
+        {
             if (result == NSModalResponseOK)
-			{
-				NSURL* url = [panel URL];
-				NSString* p = [url path];
-				std::string outfile([p UTF8String]);
-            
-				callback(true, outfile, userdata);
-			}
-			else // cancel
-			{
-				std::string outfile;
-				callback(false, outfile, userdata);
-			}
-		}];
-	}
+            {
+                NSURL* url = [panel URL];
+                NSString* p = [url path];
+                std::string outfile([p UTF8String]);
+
+                callback(true, outfile, userdata);
+            }
+            else // cancel
+            {
+                std::string outfile;
+                callback(false, outfile, userdata);
+            }
+        }];
+    }
 }
 
 #endif
diff --git a/indra/newview/llfloaterimcontainer.cpp b/indra/newview/llfloaterimcontainer.cpp
index 3d88e117ac..143781a225 100644
--- a/indra/newview/llfloaterimcontainer.cpp
+++ b/indra/newview/llfloaterimcontainer.cpp
@@ -1706,6 +1706,11 @@ void LLFloaterIMContainer::showConversation(const LLUUID& session_id)
     if (session_floater)
     {
         session_floater->restoreFloater();
+        if (session_floater->isTornOff() && session_floater->isMinimized())
+        {
+            session_floater->setMinimized(false);
+            session_floater->setFocus(true);
+        }
     }
 }
 
diff --git a/indra/newview/llvoicevivox.cpp b/indra/newview/llvoicevivox.cpp
index 14f0b52174..40de236c90 100644
--- a/indra/newview/llvoicevivox.cpp
+++ b/indra/newview/llvoicevivox.cpp
@@ -1023,7 +1023,6 @@ bool LLVivoxVoiceClient::startAndLaunchDaemon()
             std::string old_log = gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "SLVoice.old");
             if (gDirUtilp->fileExists(new_log))
             {
-                LLFile::remove(old_log, ENOENT);
                 LLFile::rename(new_log, old_log);
             }
 
diff --git a/indra/newview/llvoicewebrtc.cpp b/indra/newview/llvoicewebrtc.cpp
index 8059914ed7..447f1b652a 100644
--- a/indra/newview/llvoicewebrtc.cpp
+++ b/indra/newview/llvoicewebrtc.cpp
@@ -396,7 +396,7 @@ void LLWebRTCVoiceClient::updateSettings()
             config.mNoiseSuppressionLevel = noiseSuppressionLevel;
             audioConfigChanged            = true;
         }
-        if (audioConfigChanged)
+        if (audioConfigChanged && mWebRTCDeviceInterface)
         {
             mWebRTCDeviceInterface->setAudioConfig(config);
         }
@@ -797,7 +797,10 @@ void LLWebRTCVoiceClient::tuningStart()
 {
     if (!mIsInTuningMode)
     {
-        mWebRTCDeviceInterface->setTuningMode(true);
+        if (mWebRTCDeviceInterface)
+        {
+            mWebRTCDeviceInterface->setTuningMode(true);
+        }
         mIsInTuningMode = true;
     }
 }
@@ -806,7 +809,10 @@ void LLWebRTCVoiceClient::tuningStop()
 {
     if (mIsInTuningMode)
     {
-        mWebRTCDeviceInterface->setTuningMode(false);
+        if (mWebRTCDeviceInterface)
+        {
+            mWebRTCDeviceInterface->setTuningMode(false);
+        }
         mIsInTuningMode = false;
     }
 }
@@ -839,6 +845,10 @@ void LLWebRTCVoiceClient::tuningSetSpeakerVolume(float volume)
 
 float LLWebRTCVoiceClient::tuningGetEnergy(void)
 {
+    if (!mWebRTCDeviceInterface)
+    {
+        return 0.f;
+    }
     float rms = mWebRTCDeviceInterface->getTuningAudioLevel();
     return TUNING_LEVEL_START_POINT - TUNING_LEVEL_SCALE * rms;
 }
@@ -866,7 +876,10 @@ void LLWebRTCVoiceClient::refreshDeviceLists(bool clearCurrentList)
         clearCaptureDevices();
         clearRenderDevices();
     }
-    mWebRTCDeviceInterface->refreshDevices();
+    if (mWebRTCDeviceInterface)
+    {
+        mWebRTCDeviceInterface->refreshDevices();
+    }
 }
 
 
@@ -1174,7 +1187,7 @@ void LLWebRTCVoiceClient::sendPositionUpdate(bool force)
 void LLWebRTCVoiceClient::updateOwnVolume()
 {
     F32 audio_level = 0.0f;
-    if (!mMuteMic)
+    if (!mMuteMic && mWebRTCDeviceInterface)
     {
         float rms = mWebRTCDeviceInterface->getPeerConnectionAudioLevel();
         audio_level = LEVEL_START_POINT - LEVEL_SCALE * rms;
diff --git a/indra/newview/llvovolume.cpp b/indra/newview/llvovolume.cpp
index 63b35cf30c..4f828cc0ff 100644
--- a/indra/newview/llvovolume.cpp
+++ b/indra/newview/llvovolume.cpp
@@ -5025,7 +5025,7 @@ void LLRiggedVolume::update(
     else
     {
         face_begin = face_index;
-        face_end = face_begin + 1;
+        face_end = llmin(face_begin + 1, volume->getNumVolumeFaces());
     }
     for (S32 i = face_begin; i < face_end; ++i)
     {
diff --git a/scripts/code_tools/fix_whitespace.py b/scripts/code_tools/fix_whitespace.py
index 7a88265479..d5f7ce1cce 100644
--- a/scripts/code_tools/fix_whitespace.py
+++ b/scripts/code_tools/fix_whitespace.py
@@ -70,7 +70,7 @@ def process_directory(directory, extensions, tab_stop):
 
 def main():
     parser = argparse.ArgumentParser(description='Convert tabs to spaces in files, considering tab stops.')
-    parser.add_argument('-e', '--extensions', type=str, default='c,cpp,h,hpp,inl,py,glsl,cmake', help='Comma-separated list of file extensions to process (default: "c,cpp,h,hpp,inl,py,glsl,cmake")')
+    parser.add_argument('-e', '--extensions', type=str, default='c,cpp,m,mm,h,hpp,inl,py,glsl,cmake', help='Comma-separated list of file extensions to process (default: "c,cpp,h,hpp,inl,py,glsl,cmake")')
     parser.add_argument('-t', '--tabstop', type=int, default=4, help='Tab stop size (default: 4)')
     parser.add_argument('-d', '--directory', type=str, required=True, help='Directory to process')