Add CMakeAddFortranSubdirectory to use MinGW gfortran in VS

This patch adds a new module that allows for easy integration of MinGW
gfortran and the Visual Studio compiler. It is done in a function called
cmake_add_fortran_subdirectory. The patch also includes a test for this
feature.

7 files changed, 96 insertions, 0 deletions

diff --git a/Tests/VSGNUFortran/CMakeLists.txt b/Tests/VSGNUFortran/CMakeLists.txt
new file mode 100644
index 0000000000..2e527f9fe2
--- /dev/null
+++ b/Tests/VSGNUFortran/CMakeLists.txt
@@ -0,0 +1,39 @@
+cmake_minimum_required(VERSION 2.8)
+project(VSGNUFortran)
+# force the executable to be put out of Debug/Release dir
+# because gmake build of fortran will not be in a config
+# directory, and for easier testing we want the exe and .dll
+# to be in the same directory.
+if(CMAKE_CONFIGURATION_TYPES)
+  foreach(config ${CMAKE_CONFIGURATION_TYPES})
+    string(TOUPPER "${config}" config)
+    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY_${config}
+      "${PROJECT_BINARY_DIR}/bin")
+    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_${config}
+      "${PROJECT_BINARY_DIR}/bin")
+  endforeach()
+else()
+  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
+  set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
+endif()
+
+include(CMakeAddFortranSubdirectory)
+# add the fortran subdirectory as a fortran project
+# the subdir is fortran, the project is FortranHello
+cmake_add_fortran_subdirectory(fortran
+  PROJECT FortranHello  # project name in toplevel CMakeLists.txt
+  ARCHIVE_DIR ../bin # .lib location relative to root binary tree
+  RUNTIME_DIR ../bin # .dll location relative to root binary tree
+  LIBRARIES hello world # target libraries created
+  CMAKE_COMMAND_LINE -DEXECUTABLE_OUTPUT_PATH=../bin
+                     -DLIBRARY_OUTPUT_PATH=../bin
+  LINK_LIBRARIES  # link interface libraries
+   LINK_LIBS hello world  # hello needs world to link
+   )
+
+include_directories(${VSGNUFortran_BINARY_DIR}/fortran)
+add_subdirectory(c_code)
+# use a cmake script to run the executable so that PATH
+# can be set with the MinGW/bin in it, and the fortran
+# runtime libraries can be found.
+configure_file(runtest.cmake.in runtest.cmake @ONLY)
diff --git a/Tests/VSGNUFortran/c_code/CMakeLists.txt b/Tests/VSGNUFortran/c_code/CMakeLists.txt
new file mode 100644
index 0000000000..27d22fd356
--- /dev/null
+++ b/Tests/VSGNUFortran/c_code/CMakeLists.txt
@@ -0,0 +1,2 @@
+add_executable(c_using_fortran main.c)
+target_link_libraries(c_using_fortran hello)
diff --git a/Tests/VSGNUFortran/c_code/main.c b/Tests/VSGNUFortran/c_code/main.c
new file mode 100644
index 0000000000..391bf26fdc
--- /dev/null
+++ b/Tests/VSGNUFortran/c_code/main.c
@@ -0,0 +1,7 @@
+#include <HelloWorldFCMangle.h> // created by FortranCInterface
+extern void FC_hello(void);
+int main()
+{
+ FC_hello();
+ return 0;
+}
diff --git a/Tests/VSGNUFortran/fortran/CMakeLists.txt b/Tests/VSGNUFortran/fortran/CMakeLists.txt
new file mode 100644
index 0000000000..ff22993ad2
--- /dev/null
+++ b/Tests/VSGNUFortran/fortran/CMakeLists.txt
@@ -0,0 +1,12 @@
+cmake_minimum_required(VERSION 2.8)
+project(FortranHello Fortran C)
+
+include(FortranCInterface)
+FortranCInterface_HEADER(HelloWorldFCMangle.h
+                         MACRO_NAMESPACE "FC_"
+                         SYMBOL_NAMESPACE "FC_"
+                         SYMBOLS hello world)
+
+add_library(hello SHARED hello.f)
+add_library(world SHARED world.f)
+target_link_libraries(hello world)
diff --git a/Tests/VSGNUFortran/fortran/hello.f b/Tests/VSGNUFortran/fortran/hello.f
new file mode 100644
index 0000000000..e52119add9
--- /dev/null
+++ b/Tests/VSGNUFortran/fortran/hello.f
@@ -0,0 +1,7 @@
+!DEC$ ATTRIBUTES DLLEXPORT :: HELLO
+	SUBROUTINE HELLO
+
+	PRINT *, 'Hello'
+	CALL WORLD
+
+	END
diff --git a/Tests/VSGNUFortran/fortran/world.f b/Tests/VSGNUFortran/fortran/world.f
new file mode 100644
index 0000000000..0598eeea66
--- /dev/null
+++ b/Tests/VSGNUFortran/fortran/world.f
@@ -0,0 +1,6 @@
+!DEC$ ATTRIBUTES DLLEXPORT :: WORLD
+	SUBROUTINE WORLD
+
+	PRINT *, 'World!'
+
+	END
diff --git a/Tests/VSGNUFortran/runtest.cmake.in b/Tests/VSGNUFortran/runtest.cmake.in
new file mode 100644
index 0000000000..987207bc48
--- /dev/null
+++ b/Tests/VSGNUFortran/runtest.cmake.in
@@ -0,0 +1,23 @@
+get_filename_component(MINGW_PATH "@MINGW_GFORTRAN@" PATH)
+if(NOT EXISTS "${MINGW_PATH}")
+  set(test_exe
+    "@VSGNUFortran_BINARY_DIR@/bin/c_using_fortran@CMAKE_EXECUTABLE_SUFFIX@")
+  message("run: ${test_exe}")
+  execute_process(COMMAND "${test_exe}"
+    RESULT_VARIABLE res)
+  if(NOT "${res}" EQUAL 0)
+    message(FATAL_ERROR "${test_exe} returned a non 0 value")
+  endif()
+  return()
+endif()
+file(TO_NATIVE_PATH "${MINGW_PATH}" MINGW_PATH)
+string(REPLACE "\\" "\\\\" MINGW_PATH "${MINGW_PATH}")
+message("${MINGW_PATH}")
+set(test_exe "@VSGNUFortran_BINARY_DIR@/bin/c_using_fortran.exe")
+set(ENV{PATH} "${MINGW_PATH}";$ENV{PATH})
+message("run ${test_exe}")
+execute_process(COMMAND "${test_exe}"
+  RESULT_VARIABLE res)
+if(NOT "${res}" EQUAL 0)
+  message(FATAL_ERROR "${test_exe} returned a non 0 value")
+endif()