remove -ffast-math comiler flag

FC16 has the bug https://bugzilla.redhat.com/show_bug.cgi?id=795995
which prevents us from using our library on FC16.

Even though it's not our compiler's bug, we don't need fast-math flag here as
our compiler is not a computation oriented program, so we can remove this flag
safely.

Signed-off-by: Lu Guanqun <guanqun.lu@intel.com>
Reviewed-by: Homer Hsing <homer.xing@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>

diff --git a/backend/CMakeLists.txt b/backend/CMakeLists.txt
index 89f3c4a..5498ff0 100644 (file)
--- a/backend/CMakeLists.txt
+++ b/backend/CMakeLists.txt
@@ -43,7 +43,7 @@ endif (GBE_DEBUG_MEMORY)
 set (CMAKE_C_CXX_FLAGS "-fvisibility=hidden")
 
 if (COMPILER STREQUAL "GCC")
-  set (CMAKE_C_CXX_FLAGS "${CMAKE_C_CXX_FLAGS} -funroll-loops -Wstrict-aliasing=2 -fstrict-aliasing -msse2 -msse3 -mssse3 -msse4.1 -ffast-math -fPIC -Wall")
+  set (CMAKE_C_CXX_FLAGS "${CMAKE_C_CXX_FLAGS} -funroll-loops -Wstrict-aliasing=2 -fstrict-aliasing -msse2 -msse3 -mssse3 -msse4.1 -fPIC -Wall")
   set (CMAKE_C_CXX_FLAGS "${CMAKE_C_CXX_FLAGS}  ${LLVM_CFLAGS}")
   set (CMAKE_CXX_FLAGS "${CMAKE_C_CXX_FLAGS}  -Wno-invalid-offsetof -fno-rtti -std=c++0x")
   set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GBE_DEBUG_MEMORY_FLAG}")
@@ -70,7 +70,7 @@ elseif (COMPILER STREQUAL "CLANG")
   set (CMAKE_C_FLAGS_MINSIZEREL     "-Os -DNDEBUG -DGBE_DEBUG=0")
   set (CMAKE_C_FLAGS_RELEASE        "-O2 -DNDEBUG -DGBE_DEBUG=0")
   set (CMAKE_CXX_COMPILER             "clang++")
-  set (CMAKE_CXX_FLAGS "-fstrict-aliasing -msse2 -ffast-math -fPIC -Wall -Wno-format-security -Wno-invalid-offsetof -std=c++0x")
+  set (CMAKE_CXX_FLAGS "-fstrict-aliasing -msse2 -fPIC -Wall -Wno-format-security -Wno-invalid-offsetof -std=c++0x")
   set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GBE_DEBUG_MEMORY_FLAG}")
   set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GBE_COMPILE_UTESTS_FLAG}")
   set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${VISIBILITY_FLAG}")