3 files changed, 21 insertions, 14 deletions
diff --git a/indra/llcommon/llmemory.cpp b/indra/llcommon/llmemory.cpp
index 267159e7cc..749b66b472 100644
--- a/indra/llcommon/llmemory.cpp
+++ b/indra/llcommon/llmemory.cpp
@@ -47,9 +47,6 @@
 #include "lltrace.h"
 #include "llerror.h"
 //----------------------------------------------------------------------------
-#if defined(LL_DARWIN)
-extern LLMemoryInfo gSysMemory;
-#endif
 
 //static
 U32Kilobytes LLMemory::sAvailPhysicalMemInKB(U32_MAX);
@@ -150,8 +147,7 @@ void LLMemory::updateMemoryInfo()
         // This is what Chrome reports as 'the "Physical Memory Free" value reported by the Memory Monitor in Instruments.'
         // Note though that inactive pages are not included here and not yet free, but could become so under memory pressure.
         sAvailPhysicalMemInKB = U32Bytes(vmstat.free_count * page_size);
-
-        sMaxPhysicalMemInKB = gSysMemory.getPhysicalMemoryKB();
+        sMaxPhysicalMemInKB = LLMemoryInfo::getHardwareMemSize();
       }
     else
     {
diff --git a/indra/llcommon/llsys.cpp b/indra/llcommon/llsys.cpp
index f717b2cf34..aeb6ae1b0a 100644
--- a/indra/llcommon/llsys.cpp
+++ b/indra/llcommon/llsys.cpp
@@ -684,20 +684,28 @@ static U32Kilobytes LLMemoryAdjustKBResult(U32Kilobytes inKB)
 }
 #endif
 
+#if LL_DARWIN
+// static
+U32Kilobytes LLMemoryInfo::getHardwareMemSize()
+{
+    // This might work on Linux as well.  Someone check...
+    uint64_t phys = 0;
+    int mib[2] = { CTL_HW, HW_MEMSIZE };
+
+    size_t len = sizeof(phys);
+    sysctl(mib, 2, &phys, &len, NULL, 0);
+
+    return U64Bytes(phys);
+}
+#endif
+
 U32Kilobytes LLMemoryInfo::getPhysicalMemoryKB() const
 {
 #if LL_WINDOWS
 	return LLMemoryAdjustKBResult(U32Kilobytes(mStatsMap["Total Physical KB"].asInteger()));
 
 #elif LL_DARWIN
-	// This might work on Linux as well.  Someone check...
-	uint64_t phys = 0;
-	int mib[2] = { CTL_HW, HW_MEMSIZE };
-
-	size_t len = sizeof(phys);	
-	sysctl(mib, 2, &phys, &len, NULL, 0);
-	
-	return U64Bytes(phys);
+    return getHardwareMemSize();
 
 #elif LL_LINUX
 	U64 phys = 0;
diff --git a/indra/llcommon/llsys.h b/indra/llcommon/llsys.h
index 5ab97939b9..b2f9b6a4ab 100644
--- a/indra/llcommon/llsys.h
+++ b/indra/llcommon/llsys.h
@@ -113,7 +113,10 @@ public:
 	LLMemoryInfo(); ///< Default constructor
 	void stream(std::ostream& s) const;	///< output text info to s
 
-	U32Kilobytes getPhysicalMemoryKB() const; 
+	U32Kilobytes getPhysicalMemoryKB() const;
+#if LL_DARWIN
+    static U32Kilobytes getHardwareMemSize(); // Because some Mac linkers won't let us reference extern gSysMemory from a different lib.
+#endif
 
 	//get the available memory infomation in KiloBytes.
 	static void getAvailableMemoryKB(U32Kilobytes& avail_physical_mem_kb, U32Kilobytes& avail_virtual_mem_kb);