Merge topic 'cmake_add_fortran_subdirectory'

1e16406 CMakeAddFortranSubdirectory: Add NO_EXTERNAL_INSTALL option
6f6891b CMakeAddFortranSubdirectory: Always parse arguments
48a09f8 CMakeAddFortranSubdirectory: Make IMPORTED targets GLOBAL
067c1f4 VSGNUFortran: Disable test in special cases
bd69e1c VSGNUFortran: Add special case for SunPro Fortran runtime library
414a780 CMakeAddFortranSubdirectory: Validate gfortran architecture
7e0d9f1 CMakeAddFortranSubdirectory: Find gfortran in PATH
d6b0312 CMakeAddFortranSubdirectory: Fix documentation format and typos
e4ae038 CMakeAddFortranSubdirectory: Allow full paths to directories
538c345 Add CMakeAddFortranSubdirectory to use MinGW gfortran in VS
3c6af5f Merge branch 'add-CheckLanguage-module' into CMakeAddFortranSubdirectory

3 files changed, 217 insertions, 0 deletions

diff --git a/Modules/CMakeAddFortranSubdirectory.cmake b/Modules/CMakeAddFortranSubdirectory.cmake
new file mode 100644
index 0000000..ddb79fb
--- /dev/null
+++ b/Modules/CMakeAddFortranSubdirectory.cmake
@@ -0,0 +1,206 @@
+# - Use MinGW gfortran from VS if a fortran compiler is not found.
+# The 'add_fortran_subdirectory' function adds a subdirectory
+# to a project that contains a fortran only sub-project. The module
+# will check the current compiler and see if it can support fortran.
+# If no fortran compiler is found and the compiler is MSVC, then
+# this module will find the MinGW gfortran.  It will then use
+# an external project to build with the MinGW tools.  It will also
+# create imported targets for the libraries created.  This will only
+# work if the fortran code is built into a dll, so BUILD_SHARED_LIBS
+# is turned on in the project.  In addition the CMAKE_GNUtoMS option
+# is set to on, so that the MS .lib files are created.
+# Usage is as follows:
+#  cmake_add_fortran_subdirectory(
+#   <subdir>                # name of subdirectory
+#   PROJECT <project_name>  # project name in subdir top CMakeLists.txt
+#   ARCHIVE_DIR <dir>       # dir where project places .lib files
+#   RUNTIME_DIR <dir>       # dir where project places .dll files
+#   LIBRARIES <lib>...      # names of library targets to import
+#   LINK_LIBRARIES          # link interface libraries for LIBRARIES
+#    [LINK_LIBS <lib> <dep>...]...
+#   CMAKE_COMMAND_LINE ...  # extra command line flags to pass to cmake
+#   NO_EXTERNAL_INSTALL     # skip installation of external project
+#   )
+# Relative paths in ARCHIVE_DIR and RUNTIME_DIR are interpreted with respect
+# to the build directory corresponding to the source directory in which the
+# function is invoked.
+#
+# Limitations:
+#
+# NO_EXTERNAL_INSTALL is required for forward compatibility with a
+# future version that supports installation of the external project
+# binaries during "make install".
+
+#=============================================================================
+# Copyright 2011-2012 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.)
+
+
+set(_MS_MINGW_SOURCE_DIR ${CMAKE_CURRENT_LIST_DIR})
+include(CheckLanguage)
+include(ExternalProject)
+include(CMakeParseArguments)
+
+function(_setup_mingw_config_and_build source_dir)
+  # Look for a MinGW gfortran.
+  find_program(MINGW_GFORTRAN
+    NAMES gfortran
+    PATHS
+      c:/MinGW/bin
+      "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\MinGW;InstallLocation]/bin"
+    )
+  if(NOT MINGW_GFORTRAN)
+    message(FATAL_ERROR
+      "gfortran not found, please install MinGW with the gfortran option."
+      "Or set the cache variable MINGW_GFORTRAN to the full path. "
+      " This is required to build")
+  endif()
+
+  # Validate the MinGW gfortran we found.
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    set(_mingw_target "Target:.*64.*mingw")
+  else()
+    set(_mingw_target "Target:.*mingw32")
+  endif()
+  execute_process(COMMAND "${MINGW_GFORTRAN}" -v
+    ERROR_VARIABLE out ERROR_STRIP_TRAILING_WHITESPACE)
+  if(NOT "${out}" MATCHES "${_mingw_target}")
+    string(REPLACE "\n" "\n  " out "  ${out}")
+    message(FATAL_ERROR
+      "MINGW_GFORTRAN is set to\n"
+      "  ${MINGW_GFORTRAN}\n"
+      "which is not a MinGW gfortran for this architecture.  "
+      "The output from -v does not match \"${_mingw_target}\":\n"
+      "${out}\n"
+      "Set MINGW_GFORTRAN to a proper MinGW gfortran for this architecture."
+      )
+  endif()
+
+  # Configure scripts to run MinGW tools with the proper PATH.
+  get_filename_component(MINGW_PATH ${MINGW_GFORTRAN} PATH)
+  file(TO_NATIVE_PATH "${MINGW_PATH}" MINGW_PATH)
+  string(REPLACE "\\" "\\\\" MINGW_PATH "${MINGW_PATH}")
+  configure_file(
+    ${_MS_MINGW_SOURCE_DIR}/CMakeAddFortranSubdirectory/config_mingw.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/config_mingw.cmake
+    @ONLY)
+  configure_file(
+    ${_MS_MINGW_SOURCE_DIR}/CMakeAddFortranSubdirectory/build_mingw.cmake.in
+    ${CMAKE_CURRENT_BINARY_DIR}/build_mingw.cmake
+    @ONLY)
+endfunction()
+
+function(_add_fortran_library_link_interface library depend_library)
+  set_target_properties(${library} PROPERTIES
+    IMPORTED_LINK_INTERFACE_LIBRARIES_NOCONFIG "${depend_library}")
+endfunction()
+
+
+function(cmake_add_fortran_subdirectory subdir)
+  # Parse arguments to function
+  set(options NO_EXTERNAL_INSTALL)
+  set(oneValueArgs PROJECT ARCHIVE_DIR RUNTIME_DIR)
+  set(multiValueArgs LIBRARIES LINK_LIBRARIES CMAKE_COMMAND_LINE)
+  cmake_parse_arguments(ARGS "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
+  if(NOT ARGS_NO_EXTERNAL_INSTALL)
+    message(FATAL_ERROR
+      "Option NO_EXTERNAL_INSTALL is required (for forward compatibility) "
+      "but was not given."
+      )
+  endif()
+
+  # if we are not using MSVC without fortran support
+  # then just use the usual add_subdirectory to build
+  # the fortran library
+  check_language(Fortran)
+  if(NOT (MSVC AND (NOT CMAKE_Fortran_COMPILER)))
+    add_subdirectory(${subdir})
+    return()
+  endif()
+
+  # if we have MSVC without Intel fortran then setup
+  # external projects to build with mingw fortran
+
+  set(source_dir "${CMAKE_CURRENT_SOURCE_DIR}/${subdir}")
+  set(project_name "${ARGS_PROJECT}")
+  set(library_dir "${ARGS_ARCHIVE_DIR}")
+  set(binary_dir "${ARGS_RUNTIME_DIR}")
+  set(libraries ${ARGS_LIBRARIES})
+  # use the same directory that add_subdirectory would have used
+  set(build_dir "${CMAKE_CURRENT_BINARY_DIR}/${subdir}")
+  foreach(dir_var library_dir binary_dir)
+    if(NOT IS_ABSOLUTE "${${dir_var}}")
+      get_filename_component(${dir_var}
+        "${CMAKE_CURRENT_BINARY_DIR}/${${dir_var}}" ABSOLUTE)
+    endif()
+  endforeach()
+  # create build and configure wrapper scripts
+  _setup_mingw_config_and_build(${source_dir})
+  # create the external project
+  externalproject_add(${project_name}_build
+    SOURCE_DIR ${source_dir}
+    BINARY_DIR ${build_dir}
+    CONFIGURE_COMMAND ${CMAKE_COMMAND}
+    -P ${CMAKE_CURRENT_BINARY_DIR}/config_mingw.cmake
+    BUILD_COMMAND ${CMAKE_COMMAND}
+    -P ${CMAKE_CURRENT_BINARY_DIR}/build_mingw.cmake
+    INSTALL_COMMAND ""
+    )
+  # make the external project always run make with each build
+  externalproject_add_step(${project_name}_build forcebuild
+    COMMAND ${CMAKE_COMMAND}
+    -E remove
+    ${CMAKE_CURRENT_BUILD_DIR}/${project_name}-prefix/src/${project_name}-stamp/${project_name}-build
+    DEPENDEES configure
+    DEPENDERS build
+    ALWAYS 1
+    )
+  # create imported targets for all libraries
+  foreach(lib ${libraries})
+    add_library(${lib} SHARED IMPORTED GLOBAL)
+    set_property(TARGET ${lib} APPEND PROPERTY IMPORTED_CONFIGURATIONS NOCONFIG)
+    set_target_properties(${lib} PROPERTIES
+      IMPORTED_IMPLIB_NOCONFIG   "${library_dir}/lib${lib}.lib"
+      IMPORTED_LOCATION_NOCONFIG "${binary_dir}/lib${lib}.dll"
+      )
+    add_dependencies(${lib} ${project_name}_build)
+  endforeach()
+
+  # now setup link libraries for targets
+  set(start FALSE)
+  set(target)
+  foreach(lib ${ARGS_LINK_LIBRARIES})
+    if("${lib}" STREQUAL "LINK_LIBS")
+      set(start TRUE)
+    else()
+      if(start)
+        if(DEFINED target)
+          # process current target and target_libs
+          _add_fortran_library_link_interface(${target} "${target_libs}")
+          # zero out target and target_libs
+          set(target)
+          set(target_libs)
+        endif()
+        # save the current target and set start to FALSE
+        set(target ${lib})
+        set(start FALSE)
+      else()
+        # append the lib to target_libs
+        list(APPEND target_libs "${lib}")
+      endif()
+    endif()
+  endforeach()
+  # process anything that is left in target and target_libs
+  if(DEFINED target)
+    _add_fortran_library_link_interface(${target} "${target_libs}")
+  endif()
+endfunction()
diff --git a/Modules/CMakeAddFortranSubdirectory/build_mingw.cmake.in b/Modules/CMakeAddFortranSubdirectory/build_mingw.cmake.in
new file mode 100644
index 0000000..55b271a
--- /dev/null
+++ b/Modules/CMakeAddFortranSubdirectory/build_mingw.cmake.in
@@ -0,0 +1,2 @@
+set(ENV{PATH} "@MINGW_PATH@\;$ENV{PATH}")
+execute_process(COMMAND "@CMAKE_COMMAND@" --build . )
diff --git a/Modules/CMakeAddFortranSubdirectory/config_mingw.cmake.in b/Modules/CMakeAddFortranSubdirectory/config_mingw.cmake.in
new file mode 100644
index 0000000..97f6769
--- /dev/null
+++ b/Modules/CMakeAddFortranSubdirectory/config_mingw.cmake.in
@@ -0,0 +1,9 @@
+set(ENV{PATH} "@MINGW_PATH@\;$ENV{PATH}")
+set(CMAKE_COMMAND_LINE "@ARGS_CMAKE_COMMAND_LINE@")
+execute_process(
+  COMMAND "@CMAKE_COMMAND@" "-GMinGW Makefiles"
+  -DCMAKE_Fortran_COMPILER:PATH=@MINGW_GFORTRAN@
+  -DBUILD_SHARED_LIBS=ON
+  -DCMAKE_GNUtoMS=ON
+  ${CMAKE_COMMAND_LINE}
+  "@source_dir@")