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| -rw-r--r-- | Modules/FindOpenMP.cmake | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/Modules/FindOpenMP.cmake b/Modules/FindOpenMP.cmake new file mode 100644 index 0000000..faba123 --- /dev/null +++ b/Modules/FindOpenMP.cmake @@ -0,0 +1,108 @@ +# - 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 set. +# +# 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_FOUND - true if openmp is detected +# +# Supported compilers can be found at http://openmp.org/wp/openmp-compilers/ + + +# Copyright 2008, 2009 <André Rigland Brodtkorb> Andre.Brodtkorb@ifi.uio.no +# +# Redistribution AND use is allowed according to the terms of the New +# BSD license. +# For details see the accompanying COPYING-CMAKE-SCRIPTS file. + + +include(CheckCSourceCompiles) +include(CheckCXXSourceCompiles) +include(FindPackageHandleStandardArgs) + +set(OpenMP_C_FLAG_CANDIDATES + #Empty, if compiler automatically accepts openmp + " " + #Intel windows + "-Qopenmp" + #Intel + "-openmp" + #Sun + "-xopenmp" + #HP + "+Oopenmp" + #IBM XL C/c++ + "-qsmp" + #Portland Group + "-mp" + #Gnu + "-fopenmp" + #Microsoft Visual Studio + "/openmp" +) +set(OpenMP_CXX_FLAG_CANDIDATES ${OpenMP_C_FLAG_CANDIDATES}) + +# 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 +} +") +# 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) + set(OpenMP_C_FLAG_CANDIDATES) + set(OpenMP_CXX_FLAG_CANDIDATES) +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 "${FLAG}") + unset(OpenMP_FLAG_DETECTED CACHE) + message(STATUS "Try OpenMP flag = [${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}) + +# check cxx compiler +foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) + set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") + set(CMAKE_REQUIRED_FLAGS "${FLAG}") + unset(OpenMP_FLAG_DETECTED CACHE) + message(STATUS "Try OpenMP flag = [${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 +) |