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

@@ -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)
 

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)

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()