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Merge topic 'improve-findopenmp' 

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
parent 0b5c086693 6f573ac9ee
commit 09c16ca488
1 changed files with 129 additions and 68 deletions
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117
Modules/FindOpenMP.cmake
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@ -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.
@ -24,18 +25,22 @@
# (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
function(_OPENMP_FLAG_CANDIDATES LANG)
set(OpenMP_FLAG_CANDIDATES
#GNU
"-fopenmp" "-fopenmp"
#Microsoft Visual Studio #Microsoft Visual Studio
"/openmp" "/openmp"
#Intel windows #Intel windows
"-Qopenmp" "-Qopenmp"
#Intel #PathScale, Intel
"-openmp" "-openmp"
#Empty, if compiler automatically accepts openmp #Empty, if compiler automatically accepts openmp
" " " "
@ -45,10 +50,34 @@ set(OpenMP_C_FLAG_CANDIDATES
"+Oopenmp" "+Oopenmp"
#IBM XL C/c++ #IBM XL C/c++
"-qsmp" "-qsmp"
#Portland Group #Portland Group, MIPSpro
"-mp" "-mp"
) )
set(OpenMP_CXX_FLAG_CANDIDATES ${OpenMP_C_FLAG_CANDIDATES})
set(OMP_FLAG_GNU "-fopenmp")
set(OMP_FLAG_HP "+Oopenmp")
if(WIN32)
set(OMP_FLAG_Intel "-Qopenmp")
else()
set(OMP_FLAG_Intel "-openmp")
endif()
set(OMP_FLAG_MIPSpro "-mp")
set(OMP_FLAG_MSVC "/openmp")
set(OMP_FLAG_PathScale "-openmp")
set(OMP_FLAG_PGI "-mp")
set(OMP_FLAG_SunPro "-xopenmp")
set(OMP_FLAG_XL "-qsmp")
# Move the flag that matches the compiler to the head of the list,
# this is faster and doesn't clutter the output that much. If that
# flag doesn't work we will still try all.
if(OMP_FLAG_${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
@ -62,22 +91,24 @@ 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
if(NOT _HAVE_LANGUAGE_C EQUAL -1)
# 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 ${OpenMP_C_FLAG_CANDIDATES}) foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS "${FLAG}") set(CMAKE_REQUIRED_FLAGS "${FLAG}")
unset(OpenMP_FLAG_DETECTED CACHE) unset(OpenMP_FLAG_DETECTED CACHE)
message(STATUS "Try OpenMP C flag = [${FLAG}]") message(STATUS "Try OpenMP C flag = [${FLAG}]")
check_c_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED) check_c_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
if(OpenMP_FLAG_DETECTED) if(OpenMP_FLAG_DETECTED)
set(OpenMP_C_FLAGS_INTERNAL "${FLAG}") set(OpenMP_C_FLAGS_INTERNAL "${FLAG}")
@ -85,13 +116,33 @@ foreach(FLAG ${OpenMP_C_FLAG_CANDIDATES})
endif(OpenMP_FLAG_DETECTED) endif(OpenMP_FLAG_DETECTED)
endforeach(FLAG ${OpenMP_C_FLAG_CANDIDATES}) 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
if(NOT _HAVE_LANGUAGE_CXX EQUAL -1)
# 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 ${OpenMP_CXX_FLAG_CANDIDATES}) foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS "${FLAG}") set(CMAKE_REQUIRED_FLAGS "${FLAG}")
unset(OpenMP_FLAG_DETECTED CACHE) unset(OpenMP_FLAG_DETECTED CACHE)
message(STATUS "Try OpenMP CXX flag = [${FLAG}]") message(STATUS "Try OpenMP CXX flag = [${FLAG}]")
check_cxx_source_compiles("${OpenMP_C_TEST_SOURCE}" OpenMP_FLAG_DETECTED) check_cxx_source_compiles("${OpenMP_CXX_TEST_SOURCE}" OpenMP_FLAG_DETECTED)
set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}") set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
if(OpenMP_FLAG_DETECTED) if(OpenMP_FLAG_DETECTED)
set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}") set(OpenMP_CXX_FLAGS_INTERNAL "${FLAG}")
@ -99,16 +150,26 @@ foreach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES})
endif(OpenMP_FLAG_DETECTED) endif(OpenMP_FLAG_DETECTED)
endforeach(FLAG ${OpenMP_CXX_FLAG_CANDIDATES}) 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 "${OpenMP_CXX_FLAGS_INTERNAL}" set(OpenMP_CXX_FLAGS "${OpenMP_CXX_FLAGS_INTERNAL}"
CACHE STRING "C++ compiler flags for OpenMP parallization") 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( list(APPEND _OPENMP_REQUIRED_VARS OpenMP_CXX_FLAGS)
OpenMP_C_FLAGS unset(OpenMP_CXX_FLAG_CANDIDATES)
OpenMP_CXX_FLAGS 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()