diff options
Diffstat (limited to 'Modules/FindOpenMP.cmake')
| -rw-r--r-- | Modules/FindOpenMP.cmake | 112 |
1 files changed, 69 insertions, 43 deletions
diff --git a/Modules/FindOpenMP.cmake b/Modules/FindOpenMP.cmake index 652803c..ceac8d2 100644 --- a/Modules/FindOpenMP.cmake +++ b/Modules/FindOpenMP.cmake @@ -24,9 +24,12 @@ # (To distribute this file outside of CMake, substitute the full # License text for the above reference.) -include(CheckCSourceCompiles) -include(CheckCXXSourceCompiles) -include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) +get_property(_ENABLED_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES) +list(FIND _ENABLED_LANGUAGES "C" _HAVE_LANGUAGE_C) +list(FIND _ENABLED_LANGUAGES "CXX" _HAVE_LANGUAGE_CXX) +unset(_ENABLED_LANGUAGES) + +set(_OPENMP_REQUIRED_VARS) set(OpenMP_C_FLAG_CANDIDATES #Gnu @@ -62,8 +65,6 @@ int main() { #endif } ") -# use the same source for CXX as C for now -set(OpenMP_CXX_TEST_SOURCE ${OpenMP_C_TEST_SOURCE}) # if these are set then do not try to find them again, # by avoiding any try_compiles for the flags if(DEFINED OpenMP_C_FLAGS AND DEFINED OpenMP_CXX_FLAGS) @@ -72,43 +73,68 @@ if(DEFINED OpenMP_C_FLAGS AND DEFINED OpenMP_CXX_FLAGS) endif(DEFINED OpenMP_C_FLAGS AND DEFINED OpenMP_CXX_FLAGS) # check c compiler -foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES}) - set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") - set(CMAKE_REQUIRED_FLAGS "${FLAG}") - unset(OpenMP_FLAG_DETECTED CACHE) - message(STATUS "Try OpenMP C flag = [${FLAG}]") - check_c_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED) - set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") - if(OpenMP_FLAG_DETECTED) - set(OpenMP_C_FLAGS_INTERNAL "${FLAG}") - break() - endif(OpenMP_FLAG_DETECTED) -endforeach(FLAG ${OpenMP_C_FLAG_CANDIDATES}) +if(NOT _HAVE_LANGUAGE_C EQUAL -1) + include(CheckCSourceCompiles) + + foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES}) + set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") + set(CMAKE_REQUIRED_FLAGS "${FLAG}") + unset(OpenMP_FLAG_DETECTED CACHE) + message(STATUS "Try OpenMP C flag = [${FLAG}]") + check_c_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED) + set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") + if(OpenMP_FLAG_DETECTED) + set(OpenMP_C_FLAGS_INTERNAL "${FLAG}") + break() + endif(OpenMP_FLAG_DETECTED) + endforeach(FLAG ${OpenMP_C_FLAG_CANDIDATES}) + + set(OpenMP_C_FLAGS "${OpenMP_C_FLAGS_INTERNAL}" + CACHE STRING "C compiler flags for OpenMP parallization") + + list(APPEND _OPENMP_REQUIRED_VARS OpenMP_C_FLAGS) + unset(OpenMP_C_FLAG_CANDIDATES) +endif() # check cxx compiler -foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) - set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") - set(CMAKE_REQUIRED_FLAGS "${FLAG}") - unset(OpenMP_FLAG_DETECTED CACHE) - message(STATUS "Try OpenMP CXX flag = [${FLAG}]") - check_cxx_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED) - set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") - if(OpenMP_FLAG_DETECTED) - set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}") - break() - endif(OpenMP_FLAG_DETECTED) -endforeach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) - -set(OpenMP_C_FLAGS "${OpenMP_C_FLAGS_INTERNAL}" - CACHE STRING "C compiler flags for OpenMP parallization") - -set(OpenMP_CXX_FLAGS "${OpenMP_CXX_FLAGS_INTERNAL}" - CACHE STRING "C++ compiler flags for OpenMP parallization") -# handle the standard arguments for find_package -find_package_handle_standard_args(OpenMP DEFAULT_MSG - OpenMP_C_FLAGS OpenMP_CXX_FLAGS ) - -mark_as_advanced( - OpenMP_C_FLAGS - OpenMP_CXX_FLAGS -) +if(NOT _HAVE_LANGUAGE_CXX EQUAL -1) + include(CheckCXXSourceCompiles) + # use the same source for CXX as C for now + set(OpenMP_CXX_TEST_SOURCE ${OpenMP_C_TEST_SOURCE}) + + foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) + set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") + set(CMAKE_REQUIRED_FLAGS "${FLAG}") + unset(OpenMP_FLAG_DETECTED CACHE) + message(STATUS "Try OpenMP CXX flag = [${FLAG}]") + check_cxx_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED) + set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") + if(OpenMP_FLAG_DETECTED) + set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}") + break() + endif(OpenMP_FLAG_DETECTED) + endforeach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) + + set(OpenMP_CXX_FLAGS "${OpenMP_CXX_FLAGS_INTERNAL}" + CACHE STRING "C++ compiler flags for OpenMP parallization") + + list(APPEND _OPENMP_REQUIRED_VARS OpenMP_CXX_FLAGS) + unset(OpenMP_CXX_FLAG_CANDIDATES) + unset(OpenMP_CXX_TEST_SOURCE) +endif() + +unset(_HAVE_LANGUAGE_C) +unset(_HAVE_LANGUAGE_CXX) + +if(_OPENMP_REQUIRED_VARS) + include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) + + find_package_handle_standard_args(OpenMP + REQUIRED_VARS ${_OPENMP_REQUIRED_VARS}) + + mark_as_advanced(${_OPENMP_REQUIRED_VARS}) + + unset(_OPENMP_REQUIRED_VARS) +else() + message(SEND_ERROR "FindOpenMP requires C or CXX language to be enabled") +endif() |