Modules/FindOpenACC.cmake - third_party/cmake - Git at Google

 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.

 #[=======================================================================[.rst:
 FindOpenACC
 -----------

 .. versionadded:: 3.10

 Detect OpenACC support by the compiler.

 This module can be used to detect OpenACC support in a compiler.
 If the compiler supports OpenACC, the flags required to compile with
 OpenACC support are returned in variables for the different languages.
 Currently, only NVHPC, PGI, GNU and Cray compilers are supported.

 Imported Targets
 ^^^^^^^^^^^^^^^^

 .. versionadded:: 3.16

 The module provides :prop_tgt:`IMPORTED` targets:

 ``OpenACC::OpenACC_<lang>``
   Target for using OpenACC from ``<lang>``.

 Variables
 ^^^^^^^^^

 The module defines the following variables:

 ``OpenACC_FOUND``
   .. versionadded:: 3.25

   Variable indicating that OpenACC flags for at least one languages have been found.

 This module will set the following variables per language in your
 project, where ``<lang>`` is one of C, CXX, or Fortran:

 ``OpenACC_<lang>_FOUND``
   Variable indicating if OpenACC support for ``<lang>`` was detected.
 ``OpenACC_<lang>_FLAGS``
   OpenACC compiler flags for ``<lang>``, separated by spaces.
 ``OpenACC_<lang>_OPTIONS``
   .. versionadded:: 3.16

   OpenACC compiler flags for ``<lang>``, as a list. Suitable for usage
   with target_compile_options or target_link_options.

 The module will also try to provide the OpenACC version variables:

 ``OpenACC_<lang>_SPEC_DATE``
   Date of the OpenACC specification implemented by the ``<lang>`` compiler.
 ``OpenACC_<lang>_VERSION_MAJOR``
   Major version of OpenACC implemented by the ``<lang>`` compiler.
 ``OpenACC_<lang>_VERSION_MINOR``
   Minor version of OpenACC implemented by the ``<lang>`` compiler.
 ``OpenACC_<lang>_VERSION``
   OpenACC version implemented by the ``<lang>`` compiler.

 The specification date is formatted as given in the OpenACC standard:
 ``yyyymm`` where ``yyyy`` and ``mm`` represents the year and month of
 the OpenACC specification implemented by the ``<lang>`` compiler.

 Input Variables
 ^^^^^^^^^^^^^^^

 ``OpenACC_ACCEL_TARGET=<target>``
 If set, will the correct target accelerator flag set to the <target> will
 be returned with OpenACC_<lang>_FLAGS.
 #]=======================================================================]

 cmake_policy(PUSH)
 cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>

 set(OpenACC_C_CXX_TEST_SOURCE
 "
 int main(void){
 #ifdef _OPENACC
   return 0;
 #else
   breaks_on_purpose
 #endif
 }
 "
 )
 set(OpenACC_Fortran_TEST_SOURCE
 "
 program test
 #ifndef _OPENACC
   breaks_on_purpose
 #endif
 endprogram test
 "
 )
 set(OpenACC_C_CXX_CHECK_VERSION_SOURCE
 "
 #include <stdio.h>
 const char accver_str[] = { 'I', 'N', 'F', 'O', ':', 'O', 'p', 'e', 'n', 'A',
                             'C', 'C', '-', 'd', 'a', 't', 'e', '[',
                             ('0' + ((_OPENACC/100000)%10)),
                             ('0' + ((_OPENACC/10000)%10)),
                             ('0' + ((_OPENACC/1000)%10)),
                             ('0' + ((_OPENACC/100)%10)),
                             ('0' + ((_OPENACC/10)%10)),
                             ('0' + ((_OPENACC/1)%10)),
                             ']', '\\0' };
 int main(void)
 {
   puts(accver_str);
   return 0;
 }
 ")
 set(OpenACC_Fortran_CHECK_VERSION_SOURCE
 "
       program acc_ver
       implicit none
       integer, parameter :: zero = ichar('0')
       character, dimension(25), parameter :: accver_str =&
       (/ 'I', 'N', 'F', 'O', ':', 'O', 'p', 'e', 'n', 'A', 'C', 'C', '-',&
          'd', 'a', 't', 'e', '[',&
          char(zero + mod(_OPENACC/100000, 10)),&
          char(zero + mod(_OPENACC/10000, 10)),&
          char(zero + mod(_OPENACC/1000, 10)),&
          char(zero + mod(_OPENACC/100, 10)),&
          char(zero + mod(_OPENACC/10, 10)),&
          char(zero + mod(_OPENACC/1, 10)), ']' /)
       print *, accver_str
       end program acc_ver
 "
 )


 macro(_OPENACC_PREPARE_SOURCE LANG CONTENT_ID NAME_PREFIX FULLNAME_VAR CONTENT_VAR)
   if("${LANG}" STREQUAL "C")
     set(${FULLNAME_VAR} "${NAME_PREFIX}.c")
     set(${CONTENT_VAR} "${OpenACC_C_CXX_${CONTENT_ID}}")
   elseif("${LANG}" STREQUAL "CXX")
     set(${FULLNAME_VAR} "${NAME_PREFIX}.cpp")
     set(${CONTENT_VAR} "${OpenACC_C_CXX_${CONTENT_ID}}")
   elseif("${LANG}" STREQUAL "Fortran")
     set(${FULLNAME_VAR} "${NAME_PREFIX}.F90")
     set(${CONTENT_VAR} "${OpenACC_Fortran_${CONTENT_ID}}")
   endif()
 endmacro()


 function(_OPENACC_GET_FLAGS_CANDIDATE LANG FLAG_VAR)
   set(ACC_FLAG_NVHPC "-acc")
   set(ACC_FLAG_PGI "-acc")
   set(ACC_FLAG_GNU "-fopenacc")
   set(ACC_FLAG_Cray "-h acc")
   set(ACC_FLAG_Clang "-fopenacc")

   if(DEFINED ACC_FLAG_${CMAKE_${LANG}_COMPILER_ID})
     set("${FLAG_VAR}" "${ACC_FLAG_${CMAKE_${LANG}_COMPILER_ID}}" PARENT_SCOPE)
   else()
     # Fall back to a few common flags.
     set("${FLAG_VAR}" ${ACC_FLAG_GNU} ${ACC_FLAG_PGI})
   endif()

 endfunction()


 function(_OPENACC_GET_ACCEL_TARGET_FLAG LANG TARGET FLAG_VAR)
   # Find target accelerator flags.
   set(ACC_TARGET_FLAG_NVHPC "-ta")
   set(ACC_TARGET_FLAG_PGI "-ta")
   if(DEFINED ACC_TARGET_FLAG_${CMAKE_${LANG}_COMPILER_ID})
     set("${FLAG_VAR}" "${ACC_TARGET_FLAG_${CMAKE_${LANG}_COMPILER_ID}}=${TARGET}" PARENT_SCOPE)
   endif()
 endfunction()


 function(_OPENACC_GET_VERBOSE_FLAG LANG FLAG_VAR)
   # Find compiler's verbose flag for OpenACC.
   set(ACC_VERBOSE_FLAG_NVHPC "-Minfo=accel")
   set(ACC_VERBOSE_FLAG_PGI "-Minfo=accel")
   if(DEFINED ACC_VERBOSE_FLAG_${CMAKE_${LANG}_COMPILER_ID})
     set("${FLAG_VAR}" "${ACC_VERBOSE_FLAG_${CMAKE_${LANG}_COMPILER_ID}}" PARENT_SCOPE)
   endif()
 endfunction()


 function(_OPENACC_GET_FLAGS LANG FLAG_VAR)
   set(FLAG_CANDIDATES "")
   _OPENACC_GET_FLAGS_CANDIDATE("${LANG}" FLAG_CANDIDATES)
   _OPENACC_PREPARE_SOURCE("${LANG}" TEST_SOURCE OpenACCTryFlag
     _OPENACC_TEST_SRC_NAME _OPENACC_TEST_SRC_CONTENT)

   foreach(FLAG IN LISTS FLAG_CANDIDATES)
     try_compile(OpenACC_FLAG_TEST_RESULT
       SOURCE_FROM_VAR "${_OPENACC_TEST_SRC_NAME}" _OPENACC_TEST_SRC_CONTENT
       CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${FLAG}"
       OUTPUT_VARIABLE OpenACC_TRY_COMPILE_OUTPUT
     )
     if(OpenACC_FLAG_TEST_RESULT)
       set("${FLAG_VAR}" "${FLAG}")
       if(DEFINED OpenACC_ACCEL_TARGET)
         _OPENACC_GET_ACCEL_TARGET_FLAG("${LANG}" "${OpenACC_ACCEL_TARGET}" TARGET_FLAG)
         string(APPEND "${FLAG_VAR}" " ${TARGET_FLAG}")
       endif()

       if(CMAKE_VERBOSE_MAKEFILE)
         # -Minfo=accel prints out OpenACC's messages on optimizations.
         _OPENACC_GET_VERBOSE_FLAG("${LANG}" OpenACC_VERBOSE_FLAG)
         string(APPEND "${FLAG_VAR}" " ${OpenACC_VERBOSE_FLAG}")
       endif()
       set("${FLAG_VAR}" "${${FLAG_VAR}}" PARENT_SCOPE)
       break()
     endif()
   endforeach()

 endfunction()


 function(_OPENACC_GET_SPEC_DATE LANG SPEC_DATE)
   _OPENACC_PREPARE_SOURCE(${LANG} CHECK_VERSION_SOURCE OpenACCCheckVersion
     _OPENACC_TEST_SRC_NAME _OPENACC_TEST_SRC_CONTENT)

   set(BIN_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenACC/accver_${LANG}.bin")
   try_compile(OpenACC_SPECTEST_${LANG}
     SOURCE_FROM_VAR "${_OPENACC_TEST_SRC_NAME}" _OPENACC_TEST_SRC_CONTENT
     CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenACC_${LANG}_FLAGS}"
     COPY_FILE "${BIN_FILE}"
     OUTPUT_VARIABLE OUTPUT)

   if(${OpenACC_SPECTEST_${LANG}})
     file(STRINGS ${BIN_FILE} specstr LIMIT_COUNT 1 REGEX "INFO:OpenACC-date")
     set(regex_spec_date ".*INFO:OpenACC-date\\[0*([^]]*)\\].*")
     if("${specstr}" MATCHES "${regex_spec_date}")
       set(${SPEC_DATE} "${CMAKE_MATCH_1}" PARENT_SCOPE)
     endif()
   endif()
 endfunction()


 macro(_OPENACC_SET_VERSION_BY_SPEC_DATE LANG)
   set(OpenACC_SPEC_DATE_MAP
     # Combined versions, 2.5 onwards
     "201510=2.5"
     # 2013 08 is the corrected version.
     "201308=2.0"
     "201306=2.0"
     "201111=1.0"
   )

   string(REGEX MATCHALL "${OpenACC_${LANG}_SPEC_DATE}=([0-9]+)\\.([0-9]+)" _version_match "${OpenACC_SPEC_DATE_MAP}")
   if(NOT _version_match STREQUAL "")
     set(OpenACC_${LANG}_VERSION_MAJOR ${CMAKE_MATCH_1})
     set(OpenACC_${LANG}_VERSION_MINOR ${CMAKE_MATCH_2})
     set(OpenACC_${LANG}_VERSION "${OpenACC_${LANG}_VERSION_MAJOR}.${OpenACC_${LANG}_VERSION_MINOR}")
   else()
     unset(OpenACC_${LANG}_VERSION_MAJOR)
     unset(OpenACC_${LANG}_VERSION_MINOR)
     unset(OpenACC_${LANG}_VERSION)
   endif()
   unset(_version_match)
   unset(OpenACC_SPEC_DATE_MAP)
 endmacro()


 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
 foreach (LANG IN ITEMS C CXX Fortran)
   if(CMAKE_${LANG}_COMPILER_LOADED)
     set(OpenACC_${LANG}_FIND_QUIETLY ${OpenACC_FIND_QUIETLY})
     set(OpenACC_${LANG}_FIND_REQUIRED ${OpenACC_FIND_REQUIRED})
     set(OpenACC_${LANG}_FIND_VERSION ${OpenACC_FIND_VERSION})
     set(OpenACC_${LANG}_FIND_VERSION_EXACT ${OpenACC_FIND_VERSION_EXACT})

     if(NOT DEFINED OpenACC_${LANG}_FLAGS)
       _OPENACC_GET_FLAGS("${LANG}" OpenACC_${LANG}_FLAGS)
     endif()
     if(NOT DEFINED OpenACC_${LANG}_OPTIONS)
       separate_arguments(OpenACC_${LANG}_OPTIONS NATIVE_COMMAND "${OpenACC_${LANG}_FLAGS}")
     endif()
     _OPENACC_GET_SPEC_DATE("${LANG}" OpenACC_${LANG}_SPEC_DATE)
     _OPENACC_SET_VERSION_BY_SPEC_DATE("${LANG}")

     find_package_handle_standard_args(OpenACC_${LANG}
       NAME_MISMATCHED
       REQUIRED_VARS OpenACC_${LANG}_FLAGS
       VERSION_VAR OpenACC_${LANG}_VERSION
     )
     if(OpenACC_${LANG}_FOUND)
       set(OpenACC_FOUND TRUE)
     endif()
   endif()
 endforeach()

 foreach (LANG IN ITEMS C CXX Fortran)
   if(OpenACC_${LANG}_FOUND AND NOT TARGET OpenACC::OpenACC_${LANG})
     add_library(OpenACC::OpenACC_${LANG} INTERFACE IMPORTED)
   endif()
   if(OpenACC_${LANG}_LIBRARIES)
     set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
       INTERFACE_LINK_LIBRARIES "${OpenACC_${LANG}_LIBRARIES}")
   endif()
   if(OpenACC_${LANG}_FLAGS)
     set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
       INTERFACE_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:${LANG}>:SHELL:${OpenACC_${LANG}_FLAGS}>")
     set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
       INTERFACE_LINK_OPTIONS "$<$<COMPILE_LANGUAGE:${LANG}>:SHELL:${OpenACC_${LANG}_FLAGS}>")
     unset(_OpenACC_${LANG}_OPTIONS)
   endif()
 endforeach()

 unset(OpenACC_C_CXX_TEST_SOURCE)
 unset(OpenACC_Fortran_TEST_SOURCE)
 unset(OpenACC_C_CXX_CHECK_VERSION_SOURCE)
 unset(OpenACC_Fortran_CHECK_VERSION_SOURCE)

 cmake_policy(POP)
	# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
	# file Copyright.txt or https://cmake.org/licensing for details.

	#[=======================================================================[.rst:
	FindOpenACC
	-----------

	.. versionadded:: 3.10

	Detect OpenACC support by the compiler.

	This module can be used to detect OpenACC support in a compiler.
	If the compiler supports OpenACC, the flags required to compile with
	OpenACC support are returned in variables for the different languages.
	Currently, only NVHPC, PGI, GNU and Cray compilers are supported.

	Imported Targets
	^^^^^^^^^^^^^^^^

	.. versionadded:: 3.16

	The module provides :prop_tgt:`IMPORTED` targets:

	``OpenACC::OpenACC_<lang>``
	Target for using OpenACC from ``<lang>``.

	Variables
	^^^^^^^^^

	The module defines the following variables:

	``OpenACC_FOUND``
	.. versionadded:: 3.25

	Variable indicating that OpenACC flags for at least one languages have been found.

	This module will set the following variables per language in your
	project, where ``<lang>`` is one of C, CXX, or Fortran:

	``OpenACC_<lang>_FOUND``
	Variable indicating if OpenACC support for ``<lang>`` was detected.
	``OpenACC_<lang>_FLAGS``
	OpenACC compiler flags for ``<lang>``, separated by spaces.
	``OpenACC_<lang>_OPTIONS``
	.. versionadded:: 3.16

	OpenACC compiler flags for ``<lang>``, as a list. Suitable for usage
	with target_compile_options or target_link_options.

	The module will also try to provide the OpenACC version variables:

	``OpenACC_<lang>_SPEC_DATE``
	Date of the OpenACC specification implemented by the ``<lang>`` compiler.
	``OpenACC_<lang>_VERSION_MAJOR``
	Major version of OpenACC implemented by the ``<lang>`` compiler.
	``OpenACC_<lang>_VERSION_MINOR``
	Minor version of OpenACC implemented by the ``<lang>`` compiler.
	``OpenACC_<lang>_VERSION``
	OpenACC version implemented by the ``<lang>`` compiler.

	The specification date is formatted as given in the OpenACC standard:
	``yyyymm`` where ``yyyy`` and ``mm`` represents the year and month of
	the OpenACC specification implemented by the ``<lang>`` compiler.

	Input Variables
	^^^^^^^^^^^^^^^

	``OpenACC_ACCEL_TARGET=<target>``
	If set, will the correct target accelerator flag set to the <target> will
	be returned with OpenACC_<lang>_FLAGS.
	#]=======================================================================]

	cmake_policy(PUSH)
	cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>

	set(OpenACC_C_CXX_TEST_SOURCE
	"
	int main(void){
	#ifdef _OPENACC
	return 0;
	#else
	breaks_on_purpose
	#endif
	}
	"
	)
	set(OpenACC_Fortran_TEST_SOURCE
	"
	program test
	#ifndef _OPENACC
	breaks_on_purpose
	#endif
	endprogram test
	"
	)
	set(OpenACC_C_CXX_CHECK_VERSION_SOURCE
	"
	#include <stdio.h>
	const char accver_str[] = { 'I', 'N', 'F', 'O', ':', 'O', 'p', 'e', 'n', 'A',
	'C', 'C', '-', 'd', 'a', 't', 'e', '[',
	('0' + ((_OPENACC/100000)%10)),
	('0' + ((_OPENACC/10000)%10)),
	('0' + ((_OPENACC/1000)%10)),
	('0' + ((_OPENACC/100)%10)),
	('0' + ((_OPENACC/10)%10)),
	('0' + ((_OPENACC/1)%10)),
	']', '\\0' };
	int main(void)
	{
	puts(accver_str);
	return 0;
	}
	")
	set(OpenACC_Fortran_CHECK_VERSION_SOURCE
	"
	program acc_ver
	implicit none
	integer, parameter :: zero = ichar('0')
	character, dimension(25), parameter :: accver_str =&
	(/ 'I', 'N', 'F', 'O', ':', 'O', 'p', 'e', 'n', 'A', 'C', 'C', '-',&
	'd', 'a', 't', 'e', '[',&
	char(zero + mod(_OPENACC/100000, 10)),&
	char(zero + mod(_OPENACC/10000, 10)),&
	char(zero + mod(_OPENACC/1000, 10)),&
	char(zero + mod(_OPENACC/100, 10)),&
	char(zero + mod(_OPENACC/10, 10)),&
	char(zero + mod(_OPENACC/1, 10)), ']' /)
	print *, accver_str
	end program acc_ver
	"
	)


	macro(_OPENACC_PREPARE_SOURCE LANG CONTENT_ID NAME_PREFIX FULLNAME_VAR CONTENT_VAR)
	if("${LANG}" STREQUAL "C")
	set(${FULLNAME_VAR} "${NAME_PREFIX}.c")
	set(${CONTENT_VAR} "${OpenACC_C_CXX_${CONTENT_ID}}")
	elseif("${LANG}" STREQUAL "CXX")
	set(${FULLNAME_VAR} "${NAME_PREFIX}.cpp")
	set(${CONTENT_VAR} "${OpenACC_C_CXX_${CONTENT_ID}}")
	elseif("${LANG}" STREQUAL "Fortran")
	set(${FULLNAME_VAR} "${NAME_PREFIX}.F90")
	set(${CONTENT_VAR} "${OpenACC_Fortran_${CONTENT_ID}}")
	endif()
	endmacro()


	function(_OPENACC_GET_FLAGS_CANDIDATE LANG FLAG_VAR)
	set(ACC_FLAG_NVHPC "-acc")
	set(ACC_FLAG_PGI "-acc")
	set(ACC_FLAG_GNU "-fopenacc")
	set(ACC_FLAG_Cray "-h acc")
	set(ACC_FLAG_Clang "-fopenacc")

	if(DEFINED ACC_FLAG_${CMAKE_${LANG}_COMPILER_ID})
	set("${FLAG_VAR}" "${ACC_FLAG_${CMAKE_${LANG}_COMPILER_ID}}" PARENT_SCOPE)
	else()
	# Fall back to a few common flags.
	set("${FLAG_VAR}" ${ACC_FLAG_GNU} ${ACC_FLAG_PGI})
	endif()

	endfunction()


	function(_OPENACC_GET_ACCEL_TARGET_FLAG LANG TARGET FLAG_VAR)
	# Find target accelerator flags.
	set(ACC_TARGET_FLAG_NVHPC "-ta")
	set(ACC_TARGET_FLAG_PGI "-ta")
	if(DEFINED ACC_TARGET_FLAG_${CMAKE_${LANG}_COMPILER_ID})
	set("${FLAG_VAR}" "${ACC_TARGET_FLAG_${CMAKE_${LANG}_COMPILER_ID}}=${TARGET}" PARENT_SCOPE)
	endif()
	endfunction()


	function(_OPENACC_GET_VERBOSE_FLAG LANG FLAG_VAR)
	# Find compiler's verbose flag for OpenACC.
	set(ACC_VERBOSE_FLAG_NVHPC "-Minfo=accel")
	set(ACC_VERBOSE_FLAG_PGI "-Minfo=accel")
	if(DEFINED ACC_VERBOSE_FLAG_${CMAKE_${LANG}_COMPILER_ID})
	set("${FLAG_VAR}" "${ACC_VERBOSE_FLAG_${CMAKE_${LANG}_COMPILER_ID}}" PARENT_SCOPE)
	endif()
	endfunction()


	function(_OPENACC_GET_FLAGS LANG FLAG_VAR)
	set(FLAG_CANDIDATES "")
	_OPENACC_GET_FLAGS_CANDIDATE("${LANG}" FLAG_CANDIDATES)
	_OPENACC_PREPARE_SOURCE("${LANG}" TEST_SOURCE OpenACCTryFlag
	_OPENACC_TEST_SRC_NAME _OPENACC_TEST_SRC_CONTENT)

	foreach(FLAG IN LISTS FLAG_CANDIDATES)
	try_compile(OpenACC_FLAG_TEST_RESULT
	SOURCE_FROM_VAR "${_OPENACC_TEST_SRC_NAME}" _OPENACC_TEST_SRC_CONTENT
	CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${FLAG}"
	OUTPUT_VARIABLE OpenACC_TRY_COMPILE_OUTPUT
	)
	if(OpenACC_FLAG_TEST_RESULT)
	set("${FLAG_VAR}" "${FLAG}")
	if(DEFINED OpenACC_ACCEL_TARGET)
	_OPENACC_GET_ACCEL_TARGET_FLAG("${LANG}" "${OpenACC_ACCEL_TARGET}" TARGET_FLAG)
	string(APPEND "${FLAG_VAR}" " ${TARGET_FLAG}")
	endif()

	if(CMAKE_VERBOSE_MAKEFILE)
	# -Minfo=accel prints out OpenACC's messages on optimizations.
	_OPENACC_GET_VERBOSE_FLAG("${LANG}" OpenACC_VERBOSE_FLAG)
	string(APPEND "${FLAG_VAR}" " ${OpenACC_VERBOSE_FLAG}")
	endif()
	set("${FLAG_VAR}" "${${FLAG_VAR}}" PARENT_SCOPE)
	break()
	endif()
	endforeach()

	endfunction()


	function(_OPENACC_GET_SPEC_DATE LANG SPEC_DATE)
	_OPENACC_PREPARE_SOURCE(${LANG} CHECK_VERSION_SOURCE OpenACCCheckVersion
	_OPENACC_TEST_SRC_NAME _OPENACC_TEST_SRC_CONTENT)

	set(BIN_FILE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/FindOpenACC/accver_${LANG}.bin")
	try_compile(OpenACC_SPECTEST_${LANG}
	SOURCE_FROM_VAR "${_OPENACC_TEST_SRC_NAME}" _OPENACC_TEST_SRC_CONTENT
	CMAKE_FLAGS "-DCOMPILE_DEFINITIONS:STRING=${OpenACC_${LANG}_FLAGS}"
	COPY_FILE "${BIN_FILE}"
	OUTPUT_VARIABLE OUTPUT)

	if(${OpenACC_SPECTEST_${LANG}})
	file(STRINGS ${BIN_FILE} specstr LIMIT_COUNT 1 REGEX "INFO:OpenACC-date")
	set(regex_spec_date ".INFO:OpenACC-date\\[0([^]])\\].")
	if("${specstr}" MATCHES "${regex_spec_date}")
	set(${SPEC_DATE} "${CMAKE_MATCH_1}" PARENT_SCOPE)
	endif()
	endif()
	endfunction()


	macro(_OPENACC_SET_VERSION_BY_SPEC_DATE LANG)
	set(OpenACC_SPEC_DATE_MAP
	# Combined versions, 2.5 onwards
	"201510=2.5"
	# 2013 08 is the corrected version.
	"201308=2.0"
	"201306=2.0"
	"201111=1.0"
	)

	string(REGEX MATCHALL "${OpenACC_${LANG}_SPEC_DATE}=([0-9]+)\\.([0-9]+)" _version_match "${OpenACC_SPEC_DATE_MAP}")
	if(NOT _version_match STREQUAL "")
	set(OpenACC_${LANG}_VERSION_MAJOR ${CMAKE_MATCH_1})
	set(OpenACC_${LANG}_VERSION_MINOR ${CMAKE_MATCH_2})
	set(OpenACC_${LANG}_VERSION "${OpenACC_${LANG}_VERSION_MAJOR}.${OpenACC_${LANG}_VERSION_MINOR}")
	else()
	unset(OpenACC_${LANG}_VERSION_MAJOR)
	unset(OpenACC_${LANG}_VERSION_MINOR)
	unset(OpenACC_${LANG}_VERSION)
	endif()
	unset(_version_match)
	unset(OpenACC_SPEC_DATE_MAP)
	endmacro()


	include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
	foreach (LANG IN ITEMS C CXX Fortran)
	if(CMAKE_${LANG}_COMPILER_LOADED)
	set(OpenACC_${LANG}_FIND_QUIETLY ${OpenACC_FIND_QUIETLY})
	set(OpenACC_${LANG}_FIND_REQUIRED ${OpenACC_FIND_REQUIRED})
	set(OpenACC_${LANG}_FIND_VERSION ${OpenACC_FIND_VERSION})
	set(OpenACC_${LANG}_FIND_VERSION_EXACT ${OpenACC_FIND_VERSION_EXACT})

	if(NOT DEFINED OpenACC_${LANG}_FLAGS)
	_OPENACC_GET_FLAGS("${LANG}" OpenACC_${LANG}_FLAGS)
	endif()
	if(NOT DEFINED OpenACC_${LANG}_OPTIONS)
	separate_arguments(OpenACC_${LANG}_OPTIONS NATIVE_COMMAND "${OpenACC_${LANG}_FLAGS}")
	endif()
	_OPENACC_GET_SPEC_DATE("${LANG}" OpenACC_${LANG}_SPEC_DATE)
	_OPENACC_SET_VERSION_BY_SPEC_DATE("${LANG}")

	find_package_handle_standard_args(OpenACC_${LANG}
	NAME_MISMATCHED
	REQUIRED_VARS OpenACC_${LANG}_FLAGS
	VERSION_VAR OpenACC_${LANG}_VERSION
	)
	if(OpenACC_${LANG}_FOUND)
	set(OpenACC_FOUND TRUE)
	endif()
	endif()
	endforeach()

	foreach (LANG IN ITEMS C CXX Fortran)
	if(OpenACC_${LANG}_FOUND AND NOT TARGET OpenACC::OpenACC_${LANG})
	add_library(OpenACC::OpenACC_${LANG} INTERFACE IMPORTED)
	endif()
	if(OpenACC_${LANG}_LIBRARIES)
	set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
	INTERFACE_LINK_LIBRARIES "${OpenACC_${LANG}_LIBRARIES}")
	endif()
	if(OpenACC_${LANG}_FLAGS)
	set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
	INTERFACE_COMPILE_OPTIONS "$<$<COMPILE_LANGUAGE:${LANG}>:SHELL:${OpenACC_${LANG}_FLAGS}>")
	set_property(TARGET OpenACC::OpenACC_${LANG} PROPERTY
	INTERFACE_LINK_OPTIONS "$<$<COMPILE_LANGUAGE:${LANG}>:SHELL:${OpenACC_${LANG}_FLAGS}>")
	unset(_OpenACC_${LANG}_OPTIONS)
	endif()
	endforeach()

	unset(OpenACC_C_CXX_TEST_SOURCE)
	unset(OpenACC_Fortran_TEST_SOURCE)
	unset(OpenACC_C_CXX_CHECK_VERSION_SOURCE)
	unset(OpenACC_Fortran_CHECK_VERSION_SOURCE)

	cmake_policy(POP)