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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# CheckFortranSourceCompiles
# --------------------------
#
# Check if given Fortran source compiles and links into an executable::
#
# CHECK_Fortran_SOURCE_COMPILES(<code> <var> [FAIL_REGEX <fail-regex>]
# [SRC_EXT <ext>])
#
# The arguments are:
#
# ``<code>``
# Source code to try to compile. It must define a PROGRAM entry point.
# ``<var>``
# Variable to store whether the source code compiled.
# Will be created as an internal cache variable.
# ``FAIL_REGEX <fail-regex>``
# Fail if test output matches this regex.
# ``SRC_EXT <ext>``
# Use source extension ``.<ext>`` instead of the default ``.F``.
#
# The following variables may be set before calling this macro to modify
# the way the check is run::
#
# CMAKE_REQUIRED_FLAGS = string of compile command line flags
# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
# CMAKE_REQUIRED_INCLUDES = list of include directories
# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
# CMAKE_REQUIRED_QUIET = execute quietly without messages
macro(CHECK_Fortran_SOURCE_COMPILES SOURCE VAR)
if(NOT DEFINED "${VAR}")
set(_FAIL_REGEX)
set(_SRC_EXT)
set(_key)
foreach(arg ${ARGN})
if("${arg}" MATCHES "^(FAIL_REGEX|SRC_EXT)$")
set(_key "${arg}")
elseif(_key)
list(APPEND _${_key} "${arg}")
else()
message(FATAL_ERROR "Unknown argument:\n ${arg}\n")
endif()
endforeach()
if(NOT _SRC_EXT)
set(_SRC_EXT F)
endif()
set(MACRO_CHECK_FUNCTION_DEFINITIONS
"-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
if(CMAKE_REQUIRED_LIBRARIES)
set(CHECK_Fortran_SOURCE_COMPILES_ADD_LIBRARIES
LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
else()
set(CHECK_Fortran_SOURCE_COMPILES_ADD_LIBRARIES)
endif()
if(CMAKE_REQUIRED_INCLUDES)
set(CHECK_Fortran_SOURCE_COMPILES_ADD_INCLUDES
"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
else()
set(CHECK_Fortran_SOURCE_COMPILES_ADD_INCLUDES)
endif()
file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.${_SRC_EXT}"
"${SOURCE}\n")
if(NOT CMAKE_REQUIRED_QUIET)
message(STATUS "Performing Test ${VAR}")
endif()
try_compile(${VAR}
${CMAKE_BINARY_DIR}
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.${_SRC_EXT}
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
${CHECK_Fortran_SOURCE_COMPILES_ADD_LIBRARIES}
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
"${CHECK_Fortran_SOURCE_COMPILES_ADD_INCLUDES}"
OUTPUT_VARIABLE OUTPUT)
foreach(_regex ${_FAIL_REGEX})
if("${OUTPUT}" MATCHES "${_regex}")
set(${VAR} 0)
endif()
endforeach()
if(${VAR})
set(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
if(NOT CMAKE_REQUIRED_QUIET)
message(STATUS "Performing Test ${VAR} - Success")
endif()
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Performing Fortran SOURCE FILE Test ${VAR} succeeded with the following output:\n"
"${OUTPUT}\n"
"Source file was:\n${SOURCE}\n")
else()
if(NOT CMAKE_REQUIRED_QUIET)
message(STATUS "Performing Test ${VAR} - Failed")
endif()
set(${VAR} "" CACHE INTERNAL "Test ${VAR}")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Performing Fortran SOURCE FILE Test ${VAR} failed with the following output:\n"
"${OUTPUT}\n"
"Source file was:\n${SOURCE}\n")
endif()
endif()
endmacro()
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