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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,332 @@ # Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. #.rst: # FindOpenMP # ---------- # # Finds OpenMP support # # This module can be used to detect OpenMP support in a compiler. If # the compiler supports OpenMP, the flags required to compile with # OpenMP support are returned in variables for the different languages. # The variables may be empty if the compiler does not need a special # flag to support OpenMP. # # The following variables are set: # # ``OpenMP_C_FLAGS`` # Flags to add to the C compiler for OpenMP support. # ``OpenMP_CXX_FLAGS`` # Flags to add to the CXX compiler for OpenMP support. # ``OpenMP_Fortran_FLAGS`` # Flags to add to the Fortran compiler for OpenMP support. # ``OPENMP_FOUND`` # True if openmp is detected. # # The following internal variables are set, if detected: # # ``OpenMP_C_SPEC_DATE`` # Specification date of OpenMP version of C compiler. # ``OpenMP_CXX_SPEC_DATE`` # Specification date of OpenMP version of CXX compiler. # ``OpenMP_Fortran_SPEC_DATE`` # Specification date of OpenMP version of Fortran compiler. # # The specification dates are formatted as integers of the form # ``CCYYMM`` where these represent the decimal digits of the century, # year, and month. message(STATUS "Looking for OPENMP") set(_OPENMP_REQUIRED_VARS) set(CMAKE_REQUIRED_QUIET_SAVE ${CMAKE_REQUIRED_QUIET}) set(CMAKE_REQUIRED_QUIET ${OpenMP_FIND_QUIETLY}) function(_OPENMP_FLAG_CANDIDATES LANG) set(OpenMP_FLAG_CANDIDATES #Empty, if compiler automatically accepts openmp " " #GNU "-fopenmp" #Clang "-fopenmp=libiomp5" "-fopenmp=libomp" #Microsoft Visual Studio "/openmp" #Intel windows "-Qopenmp" #PathScale, Intel "-openmp" #Sun "-xopenmp" #HP "+Oopenmp" #IBM XL C/c++ "-qsmp" #Portland Group, MIPSpro "-mp" ) set(OMP_FLAG_GNU "-fopenmp") set(OMP_FLAG_Clang "-fopenmp=libomp") set(OMP_FLAG_HP "+Oopenmp") if(WIN32) set(OMP_FLAG_Intel "-Qopenmp") elseif(CMAKE_${LANG}_COMPILER_ID STREQUAL "Intel" AND "${CMAKE_${LANG}_COMPILER_VERSION}" VERSION_LESS "15.0.0.20140528") set(OMP_FLAG_Intel "-openmp") else() set(OMP_FLAG_Intel "-qopenmp") endif() set(OMP_FLAG_MIPSpro "-mp") set(OMP_FLAG_MSVC "/openmp") set(OMP_FLAG_PathScale "-openmp") set(OMP_FLAG_PGI "-mp") set(OMP_FLAG_SunPro "-xopenmp") set(OMP_FLAG_XL "-qsmp") set(OMP_FLAG_Cray " ") # Move the flag that matches the compiler to the head of the list, # this is faster and doesn't clutter the output that much. If that # flag doesn't work we will still try all. if(OMP_FLAG_${CMAKE_${LANG}_COMPILER_ID}) list(REMOVE_ITEM OpenMP_FLAG_CANDIDATES "${OMP_FLAG_${CMAKE_${LANG}_COMPILER_ID}}") list(INSERT OpenMP_FLAG_CANDIDATES 0 "${OMP_FLAG_${CMAKE_${LANG}_COMPILER_ID}}") endif() set(OpenMP_${LANG}_FLAG_CANDIDATES "${OpenMP_FLAG_CANDIDATES}" PARENT_SCOPE) endfunction() # sample openmp source code to test set(OpenMP_C_TEST_SOURCE " #include <omp.h> int main() { #ifdef _OPENMP return 0; #else breaks_on_purpose #endif } ") # same in Fortran set(OpenMP_Fortran_TEST_SOURCE " program test use omp_lib integer :: n n = omp_get_num_threads() end program test " ) set(OpenMP_C_CXX_CHECK_VERSION_SOURCE " #include <stdio.h> #include <omp.h> const char ompver_str[] = { 'I', 'N', 'F', 'O', ':', 'O', 'p', 'e', 'n', 'M', 'P', '-', 'd', 'a', 't', 'e', '[', ('0' + ((_OPENMP/100000)%10)), ('0' + ((_OPENMP/10000)%10)), ('0' + ((_OPENMP/1000)%10)), ('0' + ((_OPENMP/100)%10)), ('0' + ((_OPENMP/10)%10)), ('0' + ((_OPENMP/1)%10)), ']', '\\0' }; int main(int argc, char *argv[]) { printf(\"%s\\n\", ompver_str); return 0; } ") set(OpenMP_Fortran_CHECK_VERSION_SOURCE " program omp_ver use omp_lib integer, parameter :: zero = ichar('0') integer, parameter :: ompv = openmp_version character, dimension(24), parameter :: ompver_str =& (/ 'I', 'N', 'F', 'O', ':', 'O', 'p', 'e', 'n', 'M', 'P', '-',& 'd', 'a', 't', 'e', '[',& char(zero + mod(ompv/100000, 10)),& char(zero + mod(ompv/10000, 10)),& char(zero + mod(ompv/1000, 10)),& char(zero + mod(ompv/100, 10)),& char(zero + mod(ompv/10, 10)),& char(zero + mod(ompv/1, 10)), ']' /) print *, ompver_str end program omp_ver ") function(_OPENMP_GET_SPEC_DATE LANG SPEC_DATE) set(WORK_DIR ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenMP) if("${LANG}" STREQUAL "C") set(SRC_FILE ${WORK_DIR}/ompver.c) file(WRITE ${SRC_FILE} "${OpenMP_C_CXX_CHECK_VERSION_SOURCE}") elseif("${LANG}" STREQUAL "CXX") set(SRC_FILE ${WORK_DIR}/ompver.cpp) file(WRITE ${SRC_FILE} "${OpenMP_C_CXX_CHECK_VERSION_SOURCE}") else() # ("${LANG}" STREQUAL "Fortran") set(SRC_FILE ${WORK_DIR}/ompver.f90) file(WRITE ${SRC_FILE} "${OpenMP_Fortran_CHECK_VERSION_SOURCE}") endif() set(BIN_FILE ${WORK_DIR}/ompver_${LANG}.bin) try_compile(OpenMP_TRY_COMPILE_RESULT ${CMAKE_BINARY_DIR} ${SRC_FILE} CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenMP_${LANG}_FLAGS}" COPY_FILE ${BIN_FILE}) if(${OpenMP_TRY_COMPILE_RESULT}) file(STRINGS ${BIN_FILE} specstr LIMIT_COUNT 1 REGEX "INFO:OpenMP-date") set(regex_spec_date ".*INFO:OpenMP-date\\[0*([^]]*)\\].*") if("${specstr}" MATCHES "${regex_spec_date}") set(${SPEC_DATE} "${CMAKE_MATCH_1}" PARENT_SCOPE) endif() endif() unset(OpenMP_TRY_COMPILE_RESULT CACHE) endfunction() # check c compiler if(CMAKE_C_COMPILER_LOADED) # if these are set then do not try to find them again, # by avoiding any try_compiles for the flags if(OpenMP_C_FLAGS) unset(OpenMP_C_FLAG_CANDIDATES) else() _OPENMP_FLAG_CANDIDATES("C") include(CheckCSourceCompiles) endif() foreach(FLAG IN LISTS OpenMP_C_FLAG_CANDIDATES) set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") set(CMAKE_REQUIRED_FLAGS "${FLAG}") unset(OpenMP_FLAG_DETECTED CACHE) if(NOT CMAKE_REQUIRED_QUIET) message(STATUS "Try OpenMP C flag = [${FLAG}]") endif() 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 "${FLAG}") break() endif() endforeach() set(OpenMP_C_FLAGS "${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) if (NOT OpenMP_C_SPEC_DATE) _OPENMP_GET_SPEC_DATE("C" OpenMP_C_SPEC_DATE_INTERNAL) set(OpenMP_C_SPEC_DATE "${OpenMP_C_SPEC_DATE_INTERNAL}" CACHE INTERNAL "C compiler's OpenMP specification date") endif() endif() # check cxx compiler if(CMAKE_CXX_COMPILER_LOADED) # if these are set then do not try to find them again, # by avoiding any try_compiles for the flags if(OpenMP_CXX_FLAGS) unset(OpenMP_CXX_FLAG_CANDIDATES) else() _OPENMP_FLAG_CANDIDATES("CXX") include(CheckCXXSourceCompiles) # use the same source for CXX as C for now set(OpenMP_CXX_TEST_SOURCE ${OpenMP_C_TEST_SOURCE}) endif() foreach(FLAG IN LISTS OpenMP_CXX_FLAG_CANDIDATES) set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") set(CMAKE_REQUIRED_FLAGS "${FLAG}") unset(OpenMP_FLAG_DETECTED CACHE) if(NOT CMAKE_REQUIRED_QUIET) message(STATUS "Try OpenMP CXX flag = [${FLAG}]") endif() 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 "${FLAG}") break() endif() endforeach() set(OpenMP_CXX_FLAGS "${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) if (NOT OpenMP_CXX_SPEC_DATE) _OPENMP_GET_SPEC_DATE("CXX" OpenMP_CXX_SPEC_DATE_INTERNAL) set(OpenMP_CXX_SPEC_DATE "${OpenMP_CXX_SPEC_DATE_INTERNAL}" CACHE INTERNAL "C++ compiler's OpenMP specification date") endif() endif() # check Fortran compiler if(CMAKE_Fortran_COMPILER_LOADED) # if these are set then do not try to find them again, # by avoiding any try_compiles for the flags if(OpenMP_Fortran_FLAGS) unset(OpenMP_Fortran_FLAG_CANDIDATES) else() _OPENMP_FLAG_CANDIDATES("Fortran") include(${CMAKE_CURRENT_LIST_DIR}/CheckFortranSourceCompiles.cmake) endif() foreach(FLAG IN LISTS OpenMP_Fortran_FLAG_CANDIDATES) set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") set(CMAKE_REQUIRED_FLAGS "${FLAG}") unset(OpenMP_FLAG_DETECTED CACHE) if(NOT CMAKE_REQUIRED_QUIET) message(STATUS "Try OpenMP Fortran flag = [${FLAG}]") endif() check_fortran_source_compiles("${OpenMP_Fortran_TEST_SOURCE}" OpenMP_FLAG_DETECTED) set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") if(OpenMP_FLAG_DETECTED) set(OpenMP_Fortran_FLAGS_INTERNAL "${FLAG}") break() endif() endforeach() set(OpenMP_Fortran_FLAGS "${OpenMP_Fortran_FLAGS_INTERNAL}" CACHE STRING "Fortran compiler flags for OpenMP parallization") list(APPEND _OPENMP_REQUIRED_VARS OpenMP_Fortran_FLAGS) unset(OpenMP_Fortran_FLAG_CANDIDATES) if (NOT OpenMP_Fortran_SPEC_DATE) _OPENMP_GET_SPEC_DATE("Fortran" OpenMP_Fortran_SPEC_DATE_INTERNAL) set(OpenMP_Fortran_SPEC_DATE "${OpenMP_Fortran_SPEC_DATE_INTERNAL}" CACHE INTERNAL "Fortran compiler's OpenMP specification date") endif() endif() set(CMAKE_REQUIRED_QUIET ${CMAKE_REQUIRED_QUIET_SAVE}) if(_OPENMP_REQUIRED_VARS) include(FindPackageHandleStandardArgs) 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() unset(OpenMP_C_TEST_SOURCE) unset(OpenMP_CXX_TEST_SOURCE) unset(OpenMP_Fortran_TEST_SOURCE) unset(OpenMP_C_CXX_CHECK_VERSION_SOURCE) unset(OpenMP_Fortran_CHECK_VERSION_SOURCE)