From 555f589a5a3e9387956d451dc253fa1e3f35adff Mon Sep 17 00:00:00 2001
From: Bill Hoffman <bill.hoffman@kitware.com>
Date: Thu, 8 Sep 2011 17:42:49 -0400
Subject: For VS Intel Fortran IDE builds, add a check to find the Fortran
 library PATH.

To use VS C and Fotran in the same solution, it is required that VS be
able to find the Fortran run time libraries as they will be implicitly
linked by any Fortran library used by VS C programs.  This adds a check
into CMakeDetermineCompilerABI using a try-compile to find the correct
PATH.
---
 Modules/CMakeDetermineCompilerABI.cmake            | 26 ++++++++++++++++++++++
 .../IntelVSImplicitPath/CMakeLists.txt             | 11 +++++++++
 .../IntelVSImplicitPath/extract.cmake              | 12 ++++++++++
 .../FortranCInterface/IntelVSImplicitPath/hello.f  |  0
 4 files changed, 49 insertions(+)
 create mode 100644 Modules/FortranCInterface/IntelVSImplicitPath/CMakeLists.txt
 create mode 100644 Modules/FortranCInterface/IntelVSImplicitPath/extract.cmake
 create mode 100644 Modules/FortranCInterface/IntelVSImplicitPath/hello.f

diff --git a/Modules/CMakeDetermineCompilerABI.cmake b/Modules/CMakeDetermineCompilerABI.cmake
index 39d1f17..528c327 100644
--- a/Modules/CMakeDetermineCompilerABI.cmake
+++ b/Modules/CMakeDetermineCompilerABI.cmake
@@ -83,6 +83,32 @@ FUNCTION(CMAKE_DETERMINE_COMPILER_ABI lang src)
         FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
           "Parsed ${lang} implicit link information from above output:\n${log}\n\n")
       ENDIF()
+      # for VS IDE Intel Fortran we have to figure out the
+      # implicit link path for the fortran run time using
+      # a try-compile
+      IF("${lang}" MATCHES "Fortran"
+          AND "${CMAKE_GENERATOR}" MATCHES "Visual Studio")
+        SET(_desc "Determine Intel Fortran Compiler Implicit Link Path")
+        MESSAGE(STATUS "${_desc}")
+        # Build a sample project which reports symbols.
+        TRY_COMPILE(IFORT_LIB_PATH_COMPILED
+          ${CMAKE_BINARY_DIR}/CMakeFiles/IntelVSImplicitPath
+          ${CMAKE_ROOT}/Modules/FortranCInterface/IntelVSImplicitPath
+          IntelFortranImplicit
+          CMAKE_FLAGS
+          "-DCMAKE_Fortran_FLAGS:STRING=${CMAKE_Fortran_FLAGS}"
+          OUTPUT_VARIABLE _output)
+        FILE(READ
+          ${CMAKE_BINARY_DIR}/CMakeFiles/IntelVSImplicitPath/implict_link.txt
+          dir)
+        LIST(APPEND implicit_dirs "${dir}")
+        FILE(WRITE
+          "${CMAKE_BINARY_DIR}/CMakeFiles/IntelVSImplicitPath/output.txt"
+          "${_output}")
+        SET(_desc "Determine Intel Fortran Compiler Implicit Link Path -- done")
+        MESSAGE(STATUS "${_desc}")
+      ENDIF()
+
       SET(CMAKE_${lang}_IMPLICIT_LINK_LIBRARIES "${implicit_libs}" PARENT_SCOPE)
       SET(CMAKE_${lang}_IMPLICIT_LINK_DIRECTORIES "${implicit_dirs}" PARENT_SCOPE)
 
diff --git a/Modules/FortranCInterface/IntelVSImplicitPath/CMakeLists.txt b/Modules/FortranCInterface/IntelVSImplicitPath/CMakeLists.txt
new file mode 100644
index 0000000..e2a4b3f
--- /dev/null
+++ b/Modules/FortranCInterface/IntelVSImplicitPath/CMakeLists.txt
@@ -0,0 +1,11 @@
+cmake_minimum_required (VERSION 2.8)
+project(IntelFortranImplicit Fortran)
+add_custom_command(OUTPUT ${IntelFortranImplicit_BINARY_DIR}/env.txt
+  COMMAND set > ${IntelFortranImplicit_BINARY_DIR}/env.txt)
+add_library(FortranLib hello.f
+  ${IntelFortranImplicit_BINARY_DIR}/env.txt)
+add_custom_target(ExtractLibPath ALL
+  COMMAND ${CMAKE_COMMAND} -P ${IntelFortranImplicit_SOURCE_DIR}/extract.cmake
+  WORKING_DIRECTORY ${IntelFortranImplicit_BINARY_DIR}
+)
+add_dependencies(ExtractLibPath FortranLib)
diff --git a/Modules/FortranCInterface/IntelVSImplicitPath/extract.cmake b/Modules/FortranCInterface/IntelVSImplicitPath/extract.cmake
new file mode 100644
index 0000000..055247c
--- /dev/null
+++ b/Modules/FortranCInterface/IntelVSImplicitPath/extract.cmake
@@ -0,0 +1,12 @@
+file(STRINGS env.txt LIB REGEX "^LIB=.*$")
+string(REPLACE "LIB=" "" LIB "${LIB}" )
+# change LIB from a string to a ; separated list of paths
+set(LIB ${LIB})
+# look at each path and try to find ifconsol.lib
+foreach( dir ${LIB})
+  file(TO_CMAKE_PATH "${dir}" dir)
+  if(EXISTS "${dir}/ifconsol.lib")
+    file(WRITE implict_link.txt ${dir})
+    return()
+  endif()
+endforeach()
diff --git a/Modules/FortranCInterface/IntelVSImplicitPath/hello.f b/Modules/FortranCInterface/IntelVSImplicitPath/hello.f
new file mode 100644
index 0000000..e69de29
-- 
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