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Restored -O2 for MinGW

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This commit is contained in:
Andrey Kamaev 2012-05-18 17:32:55 +00:00
parent 28297c0224
commit 18c52c309b
1 changed files with 16 additions and 1 deletions
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17
cmake/OpenCVCompilerOptions.cmake
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@ -1,3 +1,18 @@
if(MINGW)
# mingw compiler is known to produce unstable SSE code with -O3 hence we are trying to use -O2 instead
if(CMAKE_COMPILER_IS_GNUCXX)
foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG)
string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
endforeach()
endif()
if(CMAKE_COMPILER_IS_GNUCC)
foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG)
string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
endforeach()
endif()
endif()
if(MSVC)
if(CMAKE_CXX_FLAGS STREQUAL CMAKE_CXX_FLAGS_INIT)
# override cmake default exception handling option
@ -14,7 +29,7 @@ set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "")
set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "")
if(MINGW)
# mingw compiler is known to produce unstable SSE code
# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
# here we are trying to workaround the problem
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG(-mstackrealign HAVE_STACKREALIGN_FLAG)