mirror of https://github.com/AxioDL/boo.git
116 lines
3.9 KiB
CMake
116 lines
3.9 KiB
CMake
# - Finds OpenMP support
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# This module can be used to detect OpenMP support in a compiler.
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# If the compiler supports OpenMP, the flags required to compile with
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# openmp support are set.
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#
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# The following variables are set:
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# OpenMP_C_FLAGS - flags to add to the C compiler for OpenMP support
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# OPENMP_FOUND - true if openmp is detected
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#
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# Supported compilers can be found at http://openmp.org/wp/openmp-compilers/
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#
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# Modifications for soxr:
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# * don't rely on presence of C++ compiler
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# * support MINGW
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#
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#=============================================================================
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# Copyright 2009 Kitware, Inc.
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# Copyright 2008-2009 André Rigland Brodtkorb <Andre.Brodtkorb@ifi.uio.no>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# * The names of Kitware, Inc., the Insight Consortium, or the names of
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# any consortium members, or of any contributors, may not be used to
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# endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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include (CheckCSourceCompiles)
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include (FindPackageHandleStandardArgs)
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set (OpenMP_C_FLAG_CANDIDATES
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#Gnu
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"-fopenmp"
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#Microsoft Visual Studio
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"/openmp"
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#Intel windows
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"-Qopenmp"
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#Intel
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"-openmp"
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#Empty, if compiler automatically accepts openmp
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" "
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#Sun
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"-xopenmp"
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#HP
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"+Oopenmp"
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#IBM XL C/c++
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"-qsmp"
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#Portland Group
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"-mp"
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)
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# sample openmp source code to test
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set (OpenMP_C_TEST_SOURCE
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"
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#include <omp.h>
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int main() {
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#ifdef _OPENMP
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return 0;
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#else
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breaks_on_purpose
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#endif
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}
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")
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# if these are set then do not try to find them again,
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# by avoiding any try_compiles for the flags
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if (DEFINED OpenMP_C_FLAGS)
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set (OpenMP_C_FLAG_CANDIDATES)
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endif (DEFINED OpenMP_C_FLAGS)
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# check c compiler
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foreach (FLAG ${OpenMP_C_FLAG_CANDIDATES})
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set (SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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set (CMAKE_REQUIRED_FLAGS "${FLAG}")
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unset (OpenMP_FLAG_DETECTED CACHE)
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message (STATUS "Try OpenMP C flag = [${FLAG}]")
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check_c_source_compiles ("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
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set (CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
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if (OpenMP_FLAG_DETECTED)
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set (OpenMP_C_FLAGS_INTERNAL "${FLAG}")
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break ()
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endif (OpenMP_FLAG_DETECTED)
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endforeach (FLAG ${OpenMP_C_FLAG_CANDIDATES})
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set (OpenMP_C_FLAGS "${OpenMP_C_FLAGS_INTERNAL}"
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CACHE STRING "C compiler flags for OpenMP parallization")
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# handle the standard arguments for find_package
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find_package_handle_standard_args (OpenMP DEFAULT_MSG
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OpenMP_C_FLAGS)
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if (MINGW)
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set (OpenMP_SHARED_LINKER_FLAGS "${OpenMP_SHARED_LINKER_FLAGS} ${OpenMP_C_FLAGS}")
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set (OpenMP_EXE_LINKER_FLAGS "${OpenMP_EXE_LINKER_FLAGS} ${OpenMP_C_FLAGS}")
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endif ()
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mark_as_advanced (OpenMP_C_FLAGS OpenMP_SHARED_LINKER_FLAGS OpenMP_EXE_LINKER_FLAGS)
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