[compiler-rt] r255165 - Fix the target specific "-msse3" flag check in CMake. NFC
Sumanth Gundapaneni via llvm-commits
llvm-commits at lists.llvm.org
Wed Dec 9 14:26:38 PST 2015
Author: sgundapa
Date: Wed Dec 9 16:26:38 2015
New Revision: 255165
URL: http://llvm.org/viewvc/llvm-project?rev=255165&view=rev
Log:
Fix the target specific "-msse3" flag check in CMake. NFC
msse3 is a target dependent flag and must be guarded as check_cxx_compiler_flag()
checks only for compiler error messages and ignores warnings. Earlier COMPILER_RT_HAS_MSSE3_FLAG
is set to "TRUE" for all targets as clang emits warnings and the compilation spits unnecessary
warnings for non-X86 targets. This issue is fixed by coupling the flag with "-Werror"
Differential Revision: http://reviews.llvm.org/D15362
Modified:
compiler-rt/trunk/cmake/config-ix.cmake
Modified: compiler-rt/trunk/cmake/config-ix.cmake
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/cmake/config-ix.cmake?rev=255165&r1=255164&r2=255165&view=diff
==============================================================================
--- compiler-rt/trunk/cmake/config-ix.cmake (original)
+++ compiler-rt/trunk/cmake/config-ix.cmake Wed Dec 9 16:26:38 2015
@@ -27,7 +27,7 @@ check_cxx_compiler_flag("-Werror -fno-fu
check_cxx_compiler_flag(-std=c++11 COMPILER_RT_HAS_STD_CXX11_FLAG)
check_cxx_compiler_flag(-ftls-model=initial-exec COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC)
check_cxx_compiler_flag(-fno-lto COMPILER_RT_HAS_FNO_LTO_FLAG)
-check_cxx_compiler_flag(-msse3 COMPILER_RT_HAS_MSSE3_FLAG)
+check_cxx_compiler_flag("-Werror -msse3" COMPILER_RT_HAS_MSSE3_FLAG)
check_cxx_compiler_flag(-std=c99 COMPILER_RT_HAS_STD_C99_FLAG)
check_cxx_compiler_flag(--sysroot=. COMPILER_RT_HAS_SYSROOT_FLAG)
@@ -574,14 +574,6 @@ else()
set(COMPILER_RT_HAS_UBSAN FALSE)
endif()
-# -msse3 flag is not valid for Mips therefore clang gives a warning
-# message with -msse3. But check_c_compiler_flags() checks only for
-# compiler error messages. Therefore COMPILER_RT_HAS_MSSE3_FLAG turns out to be
-# true on Mips, so we make it false here.
-if("${COMPILER_RT_DEFAULT_TARGET_ARCH}" MATCHES "mips")
- set(COMPILER_RT_HAS_MSSE3_FLAG FALSE)
-endif()
-
if (COMPILER_RT_HAS_SANITIZER_COMMON AND SAFESTACK_SUPPORTED_ARCH AND
OS_NAME MATCHES "Darwin|Linux|FreeBSD")
set(COMPILER_RT_HAS_SAFESTACK TRUE)
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