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FindOpenMP: Add support for components

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Language specific components are added to FindOpenMP to ease consumption
of the module's results.
This commit is contained in:
Christian Pfeiffer 2017-09-14 18:04:55 +02:00
parent 23530151b2
commit d25f30a6f8
2 changed files with 44 additions and 15 deletions
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5
Help/release/dev/findopenmp-components.rst Normal file
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@ -0,0 +1,5 @@
findopenmp-components
---------------------
* The :module:`FindOpenMP` module gained support for
language-specific components.

54
Modules/FindOpenMP.cmake
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@ -16,6 +16,19 @@
# Variables
# ^^^^^^^^^
#
# The module exposes the components ``C``, ``CXX``, and ``Fortran``.
# Each of these controls the various languages to search OpenMP support for.
#
# Depending on the enabled components the following variables will be set:
#
# ``OpenMP_FOUND``
# Variable indicating that OpenMP flags for all requested languages have been found.
# If no components are specified, this is true if OpenMP settings for all enabled languages
# were detected.
# ``OpenMP_VERSION``
# Minimal version of the OpenMP standard detected among the requested languages,
# or all enabled languages if no components were specified.
#
# This module will set the following variables per language in your
# project, where ``<lang>`` is one of C, CXX, or Fortran:
#
@ -60,16 +73,6 @@
# The specification date is formatted as given in the OpenMP standard:
# ``yyyymm`` where ``yyyy`` and ``mm`` represents the year and month of
# the OpenMP specification implemented by the ``<lang>`` compiler.
#
# Backward Compatibility
# ^^^^^^^^^^^^^^^^^^^^^^
#
# For backward compatibility with older versions of FindOpenMP, these
# variables are set, but deprecated::
#
# OpenMP_FOUND
#
# In new projects, please use the ``OpenMP_<lang>_XXX`` equivalents.
cmake_policy(PUSH)
cmake_policy(SET CMP0057 NEW) # if IN_LIST
@ -375,9 +378,15 @@ if(CMAKE_Fortran_COMPILER_LOADED)
endif()
endif()
set(OPENMP_FOUND TRUE)
if(NOT OpenMP_FIND_COMPONENTS)
set(OpenMP_FINDLIST C CXX Fortran)
else()
set(OpenMP_FINDLIST ${OpenMP_FIND_COMPONENTS})
endif()
foreach(LANG IN ITEMS C CXX Fortran)
unset(_OpenMP_MIN_VERSION)
foreach(LANG IN LISTS OpenMP_FINDLIST)
if(CMAKE_${LANG}_COMPILER_LOADED)
if (NOT OpenMP_${LANG}_SPEC_DATE)
_OPENMP_GET_SPEC_DATE("${LANG}" OpenMP_${LANG}_SPEC_DATE_INTERNAL)
@ -408,6 +417,11 @@ foreach(LANG IN ITEMS C CXX Fortran)
)
if(OpenMP_${LANG}_FOUND)
if(DEFINED OpenMP_${LANG}_VERSION)
if(NOT _OpenMP_MIN_VERSION OR _OpenMP_MIN_VERSION VERSION_GREATER OpenMP_${LANG}_VERSION)
set(_OpenMP_MIN_VERSION OpenMP_${LANG}_VERSION)
endif()
endif()
set(OpenMP_${LANG}_LIBRARIES "")
foreach(_OPENMP_IMPLICIT_LIB IN LISTS OpenMP_${LANG}_LIB_NAMES)
list(APPEND OpenMP_${LANG}_LIBRARIES "${OpenMP_${_OPENMP_IMPLICIT_LIB}_LIBRARY}")
@ -426,13 +440,23 @@ foreach(LANG IN ITEMS C CXX Fortran)
set_property(TARGET OpenMP::OpenMP_${LANG} PROPERTY
INTERFACE_LINK_LIBRARIES "${OpenMP_${LANG}_LIBRARIES}")
endif()
else()
set(OPENMP_FOUND FALSE)
endif()
endif()
endforeach()
set(OpenMP_FOUND ${OPENMP_FOUND})
unset(_OpenMP_REQ_VARS)
foreach(LANG IN ITEMS C CXX Fortran)
if((NOT OpenMP_FIND_COMPONENTS AND CMAKE_${LANG}_COMPILER_LOADED) OR LANG IN_LIST OpenMP_FIND_COMPONENTS)
list(APPEND _OpenMP_REQ_VARS "OpenMP_${LANG}_FOUND")
endif()
endforeach()
find_package_handle_standard_args(OpenMP
REQUIRED_VARS ${_OpenMP_REQ_VARS}
VERSION_VAR ${_OpenMP_MIN_VERSION}
HANDLE_COMPONENTS)
set(OPENMP_FOUND ${OpenMP_FOUND})
if(CMAKE_Fortran_COMPILER_LOADED AND OpenMP_Fortran_FOUND)
if(NOT DEFINED OpenMP_Fortran_HAVE_OMPLIB_MODULE)