[MacOSX] Fixing STL && single processor building in pixman

CMakeLists.txt

@@ -170,8 +170,8 @@ if( CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
     endif()
 
     if( APPLE )
-        set( CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -D__ASSERTMACROS__" )
-        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__ASSERTMACROS__" )
+        set( CMAKE_C_FLAGS   "${CMAKE_C_FLAGS} -D__ASSERTMACROS__ -mmacosx-version-min=10.5" )
+        set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__ASSERTMACROS__ -mmacosx-version-min=10.5" )
     endif()
 
 endif( CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang" )

CMakeModules/download_pixman.cmake

@@ -40,6 +40,8 @@ set( PREFIX ${DOWNLOAD_DIR}/pixman )
 if (APPLE) 
     if( CMAKE_OSX_ARCHITECTURES )
         set(PIXMAN_CPPFLAGS "CFLAGS=-arch ${CMAKE_OSX_ARCHITECTURES} -fno-common -mmacosx-version-min=10.5")
+    else()
+        set(PIXMAN_CPPFLAGS "CFLAGS=-fno-common -mmacosx-version-min=10.5")
     endif( CMAKE_OSX_ARCHITECTURES )
 endif(APPLE)