Fix compiling Mac OS 10.5 Universal App Bundle

Need to be able to specify minimum Mac OS X version outside of the
Makefile to avoid conflicting CFLAGS.
Moved -mmacosx-version-min LDFLAGS into the Makefile.
Moved -arch x86_64 from OPTIMIZEVM to CFLAGS to fix linker errors
(previously make-macosx-ub.sh passed it to CFLAGS manually).

Makefile

@@ -409,7 +409,17 @@ ifeq ($(PLATFORM),darwin)
   RENDERER_LIBS=
   OPTIMIZEVM=
 
-  BASE_CFLAGS += -mmacosx-version-min=10.7 -DMAC_OS_X_VERSION_MIN_REQUIRED=1070
+  # Default minimum Mac OS X version
+  ifeq ($(MACOSX_VERSION_MIN),)
+    MACOSX_VERSION_MIN=10.7
+  endif
+
+  # Multiply by 100 and then remove decimal. 10.7 -> 1070.0 -> 1070
+  MAC_OS_X_VERSION_MIN_REQUIRED=$(shell echo '$(MACOSX_VERSION_MIN) * 100' | bc | cut -d. -f1)
+
+  LDFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
+  BASE_CFLAGS += -mmacosx-version-min=$(MACOSX_VERSION_MIN) \
+                 -DMAC_OS_X_VERSION_MIN_REQUIRED=$(MAC_OS_X_VERSION_MIN_REQUIRED)
 
   ifeq ($(ARCH),ppc)
     BASE_CFLAGS += -arch ppc -faltivec
@@ -425,7 +435,8 @@ ifeq ($(PLATFORM),darwin)
     BASE_CFLAGS += -arch i386 -m32 -mstackrealign
   endif
   ifeq ($(ARCH),x86_64)
-    OPTIMIZEVM += -arch x86_64 -mfpmath=sse
+    OPTIMIZEVM += -mfpmath=sse
+    BASE_CFLAGS += -arch x86_64
   endif
 
   # When compiling on OSX for OSX, we're not cross compiling as far as the

make-macosx-ub.sh

@@ -15,29 +15,26 @@ fi
 
 unset X86_64_SDK
 unset X86_64_CFLAGS
-unset X86_64_LDFLAGS
+unset X86_64_MACOSX_VERSION_MIN
 unset X86_SDK
 unset X86_CFLAGS
-unset X86_LDFLAGS
+unset X86_MACOSX_VERSION_MIN
 unset PPC_64_SDK
 unset PPC_CFLAGS
-unset PPC_LDFLAGS
+unset PPC_MACOSX_VERSION_MIN
 
 if [ -d /Developer/SDKs/MacOSX10.5.sdk ]; then
 	X86_64_SDK=/Developer/SDKs/MacOSX10.5.sdk
-	X86_64_CFLAGS="-arch x86_64 -isysroot /Developer/SDKs/MacOSX10.5.sdk \
+	X86_64_CFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk"
-			-DMAC_OS_X_VERSION_MIN_REQUIRED=1050"
+	X86_64_MACOSX_VERSION_MIN="10.5"
-	X86_64_LDFLAGS=" -mmacosx-version-min=10.5"
 
 	X86_SDK=/Developer/SDKs/MacOSX10.5.sdk
-	X86_CFLAGS="-arch i386 -isysroot /Developer/SDKs/MacOSX10.5.sdk \
+	X86_CFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk"
-			-DMAC_OS_X_VERSION_MIN_REQUIRED=1050"
+	X86_MACOSX_VERSION_MIN="10.5"
-	X86_LDFLAGS=" -mmacosx-version-min=10.5"
 
 	PPC_SDK=/Developer/SDKs/MacOSX10.5.sdk
-	PPC_CFLAGS="-arch ppc -isysroot /Developer/SDKs/MacOSX10.5.sdk \
+	PPC_CFLAGS="-isysroot /Developer/SDKs/MacOSX10.5.sdk"
-			-DMAC_OS_X_VERSION_MIN_REQUIRED=1050"
+	PPC_MACOSX_VERSION_MIN="10.5"
-	PPC_LDFLAGS=" -mmacosx-version-min=10.5"
 fi
 
 if [ -z $X86_64_SDK ] || [ -z $X86_SDK ] || [ -z $PPC_SDK ]; then
@@ -70,7 +67,7 @@ NCPU=`sysctl -n hw.ncpu`
 #if [ -d build/release-release-x86_64 ]; then
 #	rm -r build/release-darwin-x86_64
 #fi
-(ARCH=x86_64 CC=gcc-4.0 CFLAGS=$X86_64_CFLAGS LDFLAGS=$X86_64_LDFLAGS make -j$NCPU) || exit 1;
+(ARCH=x86_64 CC=gcc-4.0 CFLAGS=$X86_64_CFLAGS MACOSX_VERSION_MIN=$X86_64_MACOSX_VERSION_MIN make -j$NCPU) || exit 1;
 
 echo;echo
 
@@ -78,7 +75,7 @@ echo;echo
 #if [ -d build/release-darwin-x86 ]; then
 #	rm -r build/release-darwin-x86
 #fi
-(ARCH=x86 CC=gcc-4.0 CFLAGS=$X86_CFLAGS LDFLAGS=$X86_LDFLAGS make -j$NCPU) || exit 1;
+(ARCH=x86 CC=gcc-4.0 CFLAGS=$X86_CFLAGS MACOSX_VERSION_MIN=$X86_MACOSX_VERSION_MIN make -j$NCPU) || exit 1;
 
 echo;echo
 
@@ -86,7 +83,7 @@ echo;echo
 #if [ -d build/release-darwin-ppc ]; then
 #	rm -r build/release-darwin-ppc
 #fi
-(ARCH=ppc CC=gcc-4.0 CFLAGS=$PPC_CFLAGS LDFLAGS=$PPC_LDFLAGS make -j$NCPU) || exit 1;
+(ARCH=ppc CC=gcc-4.0 CFLAGS=$PPC_CFLAGS MACOSX_VERSION_MIN=$PPC_MACOSX_VERSION_MIN make -j$NCPU) || exit 1;
 
 echo