Avoid use of -fomit-frame-pointer on FreeBSD platforms. It causes thrown

exceptions to abort() in cases where it should not.

Many thanks to Duraid Madina for doing the heavy lifting on the analysis
of this problem.

llvm-svn: 19256

Makefile.rules

@@ -180,6 +180,7 @@ install-bytecode:: install-bytecode-local
 # Variables derived from configuration we are building
 #--------------------------------------------------------------------
 
+
 ifdef ENABLE_PROFILING
   BuildMode := Profile
   CXX.Flags := -O3 -DNDEBUG -felide-constructors -finline-functions -pg
@@ -188,9 +189,13 @@ ifdef ENABLE_PROFILING
 else
   ifdef ENABLE_OPTIMIZED
     BuildMode := Release
-    CXX.Flags  := -O3 -DNDEBUG -finline-functions \
-                  -felide-constructors -fomit-frame-pointer
-    C.Flags    := -O3 -DNDEBUG -fomit-frame-pointer
+    # Don't use -fomit-frame-pointer on FreeBSD
+    ifneq ($(OS),FreeBSD)
+      OmitFramePointer := -fomit-frame-pointer
+    endif
+    CXX.Flags  := -O3 -DNDEBUG -finline-functions -felide-constructors \
+                  $(OmitFramePointer)
+    C.Flags    := -O3 -DNDEBUG $(OmitFramePointer)
     LD.Flags   := -O3 -DNDEBUG 
   else
     BuildMode := Debug