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#1932 Fixed SSE instability on mingw32

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This commit is contained in:
Andrey Kamaev
2012-05-17 20:25:12 +00:00
parent def87eae19
commit 4a3141accf
1 changed files with 15 additions and 15 deletions
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30
cmake/OpenCVCompilerOptions.cmake
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@@ -1,18 +1,3 @@
if (WIN32)
# 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" ${flags} "${${flags}}")
endforeach()
endif()
endif()
if(MSVC)
if(CMAKE_CXX_FLAGS STREQUAL CMAKE_CXX_FLAGS_INIT)
# override cmake default exception handling option
@@ -28,6 +13,21 @@ set(OPENCV_EXTRA_EXE_LINKER_FLAGS "")
set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "")
set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "")
if(MINGW)
# mingw compiler is known to produce unstable SSE code
# here we are trying to workaround the problem
include(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG(-mstackrealign HAVE_STACKREALIGN_FLAG)
if(HAVE_STACKREALIGN_FLAG)
set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} -mstackrealign")
else()
CHECK_CXX_COMPILER_FLAG(-mpreferred-stack-boundary=2 HAVE_PREFERRED_STACKBOUNDARY_FLAG)
if(HAVE_PREFERRED_STACKBOUNDARY_FLAG)
set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} -mstackrealign")
endif()
endif()
endif()
if(CMAKE_COMPILER_IS_GNUCXX)
# High level of warnings.
set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} -Wall")