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Add better OpenMP detection and make an option to enable it.

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Bug report and inspiration: http://code.opencv.org/issues/3328
This commit is contained in:
Roman Donchenko 2013-10-22 18:47:37 +04:00
parent 1e8b72f8c0
commit f82eb0f79c
2 changed files with 8 additions and 7 deletions
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1
CMakeLists.txt
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@ -151,6 +151,7 @@ OCV_OPTION(WITH_QT "Build with Qt Backend support" OFF
OCV_OPTION(WITH_WIN32UI "Build with Win32 UI Backend support" ON IF WIN32 )
OCV_OPTION(WITH_QUICKTIME "Use QuickTime for Video I/O insted of QTKit" OFF IF APPLE )
OCV_OPTION(WITH_TBB "Include Intel TBB support" OFF IF (NOT IOS) )
OCV_OPTION(WITH_OPENMP "Include OpenMP support" OFF)
OCV_OPTION(WITH_CSTRIPES "Include C= support" OFF IF WIN32 )
OCV_OPTION(WITH_TIFF "Include TIFF support" ON IF (NOT IOS) )
OCV_OPTION(WITH_UNICAP "Include Unicap support (GPL)" OFF IF (UNIX AND NOT APPLE AND NOT ANDROID) )

14
cmake/OpenCVFindLibsPerf.cmake
View File

@ -47,13 +47,13 @@ else()
endif()
# --- OpenMP ---
if(NOT HAVE_TBB AND NOT HAVE_CSTRIPES)
set(_fname "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/omptest.cpp")
file(WRITE "${_fname}" "#ifndef _OPENMP\n#error\n#endif\nint main() { return 0; }\n")
try_compile(HAVE_OPENMP "${CMAKE_BINARY_DIR}" "${_fname}")
file(REMOVE "${_fname}")
else()
set(HAVE_OPENMP 0)
if(WITH_OPENMP AND NOT HAVE_TBB AND NOT HAVE_CSTRIPES)
find_package(OpenMP)
if(OPENMP_FOUND)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif()
set(HAVE_OPENMP "${OPENMP_FOUND}")
endif()
# --- GCD ---