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Merge topic 'improve-findopenmp'

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6f573ac FindOpenMP: try the most likely flags first
81228e9 FindOpenMP: do not fail if only C or CXX is enabled (#11910)
This commit is contained in:
David Cole 2012-02-21 15:56:53 -05:00 committed by CMake Topic Stage
commit 09c16ca488
1 changed files with 129 additions and 68 deletions
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197
Modules/FindOpenMP.cmake
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@ -1,7 +1,7 @@
# - Finds OpenMP support # - Finds OpenMP support
# This module can be used to detect OpenMP support in a compiler. # This module can be used to detect OpenMP support in a compiler.
# If the compiler supports OpenMP, the flags required to compile with # If the compiler supports OpenMP, the flags required to compile with
# openmp support are set. # openmp support are set.
# #
# The following variables are set: # The following variables are set:
# OpenMP_C_FLAGS - flags to add to the C compiler for OpenMP support # OpenMP_C_FLAGS - flags to add to the C compiler for OpenMP support
@ -13,6 +13,7 @@
#============================================================================= #=============================================================================
# Copyright 2009 Kitware, Inc. # Copyright 2009 Kitware, Inc.
# Copyright 2008-2009 André Rigland Brodtkorb <Andre.Brodtkorb@ifi.uio.no> # Copyright 2008-2009 André Rigland Brodtkorb <Andre.Brodtkorb@ifi.uio.no>
# Copyright 2012 Rolf Eike Beer <eike@sf-mail.de>
# #
# Distributed under the OSI-approved BSD License (the "License"); # Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details. # see accompanying file Copyright.txt for details.
@ -24,31 +25,59 @@
# (To distribute this file outside of CMake, substitute the full # (To distribute this file outside of CMake, substitute the full
# License text for the above reference.) # License text for the above reference.)
include(CheckCSourceCompiles) get_property(_ENABLED_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
include(CheckCXXSourceCompiles) list(FIND _ENABLED_LANGUAGES "C" _HAVE_LANGUAGE_C)
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) list(FIND _ENABLED_LANGUAGES "CXX" _HAVE_LANGUAGE_CXX)
unset(_ENABLED_LANGUAGES)
set(OpenMP_C_FLAG_CANDIDATES set(_OPENMP_REQUIRED_VARS)
#Gnu
"-fopenmp" function(_OPENMP_FLAG_CANDIDATES LANG)
#Microsoft Visual Studio set(OpenMP_FLAG_CANDIDATES
"/openmp" #GNU
#Intel windows "-fopenmp"
"-Qopenmp" #Microsoft Visual Studio
#Intel "/openmp"
"-openmp" #Intel windows
#Empty, if compiler automatically accepts openmp "-Qopenmp"
" " #PathScale, Intel
#Sun "-openmp"
"-xopenmp" #Empty, if compiler automatically accepts openmp
#HP " "
"+Oopenmp" #Sun
#IBM XL C/c++ "-xopenmp"
"-qsmp" #HP
#Portland Group "+Oopenmp"
"-mp" #IBM XL C/c++
) "-qsmp"
set(OpenMP_CXX_FLAG_CANDIDATES ${OpenMP_C_FLAG_CANDIDATES}) #Portland Group, MIPSpro
"-mp"
)
set(OMP_FLAG_GNU "-fopenmp")
set(OMP_FLAG_HP "+Oopenmp")
if(WIN32)
set(OMP_FLAG_Intel "-Qopenmp")
else()
set(OMP_FLAG_Intel "-openmp")
endif()
set(OMP_FLAG_MIPSpro "-mp")
set(OMP_FLAG_MSVC "/openmp")
set(OMP_FLAG_PathScale "-openmp")
set(OMP_FLAG_PGI "-mp")
set(OMP_FLAG_SunPro "-xopenmp")
set(OMP_FLAG_XL "-qsmp")
# Move the flag that matches the compiler to the head of the list,
# this is faster and doesn't clutter the output that much. If that
# flag doesn't work we will still try all.
if(OMP_FLAG_${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(_OPENMP_FLAG_CANDIDATES)
# sample openmp source code to test # sample openmp source code to test
set(OpenMP_C_TEST_SOURCE set(OpenMP_C_TEST_SOURCE
@ -62,53 +91,85 @@ int main() {
#endif #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 # check c compiler
foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES}) if(NOT _HAVE_LANGUAGE_C EQUAL -1)
set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") # if these are set then do not try to find them again,
set(CMAKE_REQUIRED_FLAGS "${FLAG}") # by avoiding any try_compiles for the flags
unset(OpenMP_FLAG_DETECTED CACHE) if(OpenMP_C_FLAGS)
message(STATUS "Try OpenMP C flag = [${FLAG}]") unset(OpenMP_C_FLAG_CANDIDATES)
check_c_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED) else()
set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") _OPENMP_FLAG_CANDIDATES("C")
if(OpenMP_FLAG_DETECTED) include(CheckCSourceCompiles)
set(OpenMP_C_FLAGS_INTERNAL "${FLAG}") endif()
break()
endif(OpenMP_FLAG_DETECTED) foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
endforeach(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 # check cxx compiler
foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) if(NOT _HAVE_LANGUAGE_CXX EQUAL -1)
set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") # if these are set then do not try to find them again,
set(CMAKE_REQUIRED_FLAGS "${FLAG}") # by avoiding any try_compiles for the flags
unset(OpenMP_FLAG_DETECTED CACHE) if(OpenMP_CXX_FLAGS)
message(STATUS "Try OpenMP CXX flag = [${FLAG}]") unset(OpenMP_CXX_FLAG_CANDIDATES)
check_cxx_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED) else()
set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") _OPENMP_FLAG_CANDIDATES("CXX")
if(OpenMP_FLAG_DETECTED) include(CheckCXXSourceCompiles)
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}" # use the same source for CXX as C for now
CACHE STRING "C compiler flags for OpenMP parallization") set(OpenMP_CXX_TEST_SOURCE ${OpenMP_C_TEST_SOURCE})
endif()
set(OpenMP_CXX_FLAGS "${OpenMP_CXX_FLAGS_INTERNAL}" foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
CACHE STRING "C++ compiler flags for OpenMP parallization") set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
# handle the standard arguments for find_package set(CMAKE_REQUIRED_FLAGS "${FLAG}")
find_package_handle_standard_args(OpenMP DEFAULT_MSG unset(OpenMP_FLAG_DETECTED CACHE)
OpenMP_C_FLAGS OpenMP_CXX_FLAGS ) message(STATUS "Try OpenMP CXX flag = [${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 ${OpenMP_CXX_FLAG_CANDIDATES})
mark_as_advanced( set(OpenMP_CXX_FLAGS "${OpenMP_CXX_FLAGS_INTERNAL}"
OpenMP_C_FLAGS CACHE STRING "C++ compiler flags for OpenMP parallization")
OpenMP_CXX_FLAGS
) 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()