Add CheckFortranSourceCompiles module (#14656)

Copy the CheckCSourceCompiles module and port it to Fortran.
Extend the FortranOnly test to try using the new module.

Suggested-by: Nicolas Bock <nicolasbock@gmail.com>

1 files changed, 110 insertions, 0 deletions

diff --git a/Modules/CheckFortranSourceCompiles.cmake b/Modules/CheckFortranSourceCompiles.cmake
new file mode 100644
index 0000000..63e4539
--- /dev/null
+++ b/Modules/CheckFortranSourceCompiles.cmake
@@ -0,0 +1,110 @@
+#.rst:
+# CheckFortranSourceCompiles
+# --------------------------
+#
+# Check if given Fortran source compiles and links into an executable::
+#
+#   CHECK_Fortran_SOURCE_COMPILES(<code> <var> [FAIL_REGEX <fail-regex>])
+#
+# 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.
+# ``<fail-regex>``
+#   Fail if test output matches this regex.
+#
+# 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
+
+#=============================================================================
+# Copyright 2005-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+
+
+macro(CHECK_Fortran_SOURCE_COMPILES SOURCE VAR)
+  if(NOT DEFINED "${VAR}")
+    set(_FAIL_REGEX)
+    set(_key)
+    foreach(arg ${ARGN})
+      if("${arg}" MATCHES "^(FAIL_REGEX)$")
+        set(_key "${arg}")
+      elseif(_key)
+        list(APPEND _${_key} "${arg}")
+      else()
+        message(FATAL_ERROR "Unknown argument:\n  ${arg}\n")
+      endif()
+    endforeach()
+    set(MACRO_CHECK_FUNCTION_DEFINITIONS
+      "-D${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.F"
+      "${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.F
+      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 ${VAR} succeded with the following output:\n"
+        "${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()