1 files changed, 30 insertions, 24 deletions
diff --git a/indra/cmake/OPENAL.cmake b/indra/cmake/OPENAL.cmake
index 1bbfff6f98..0b6a7c2853 100644
--- a/indra/cmake/OPENAL.cmake
+++ b/indra/cmake/OPENAL.cmake
@@ -2,31 +2,37 @@
 include(Linking)
 include(Prebuilt)
 
-if (LINUX)
-  set(OPENAL ON CACHE BOOL "Enable OpenAL")
-else (LINUX)
-  set(OPENAL OFF CACHE BOOL "Enable OpenAL")
-endif (LINUX)
+include_guard()
+
+# ND: Turn this off by default, the openal code in the viewer isn't very well maintained, seems
+# to have memory leaks, has no option to play music streams
+# It probably makes sense to to completely remove it
+
+set(USE_OPENAL OFF CACHE BOOL "Enable OpenAL")
+# ND: To streamline arguments passed, switch from OPENAL to USE_OPENAL
+# To not break all old build scripts convert old arguments but warn about it
+if(OPENAL)
+  message( WARNING "Use of the OPENAL argument is deprecated, please switch to USE_OPENAL")
+  set(USE_OPENAL ${OPENAL})
+endif()
+
+if (USE_OPENAL)
+  add_library( ll::openal INTERFACE IMPORTED )
+  target_include_directories( ll::openal SYSTEM INTERFACE "${LIBS_PREBUILT_DIR}/include/AL")
+  target_compile_definitions( ll::openal INTERFACE LL_OPENAL=1)
+  use_prebuilt_binary(openal)
 
-if (OPENAL)
-  set(OPENAL_LIB_INCLUDE_DIRS "${LIBS_PREBUILT_DIR}/include/AL")
-  if (USESYSTEMLIBS)
-    include(FindPkgConfig)
-    include(FindOpenAL)
-    pkg_check_modules(OPENAL_LIB REQUIRED openal)
-    pkg_check_modules(FREEALUT_LIB REQUIRED freealut)
-  else (USESYSTEMLIBS)
-    use_prebuilt_binary(openal)
-  endif (USESYSTEMLIBS)
   if(WINDOWS)
-    set(OPENAL_LIBRARIES 
-      OpenAL32
-      alut
-    )
+    target_link_libraries( ll::openal INTERFACE
+            OpenAL32
+            alut
+            )
+  elseif(LINUX)
+    target_link_libraries( ll::openal INTERFACE
+            openal
+            alut
+            )
   else()
-    set(OPENAL_LIBRARIES 
-      openal
-      alut
-    )
+    message(FATAL_ERROR "OpenAL is not available for this platform")
   endif()
-endif (OPENAL)
+endif ()