Move CMAKE_<LANG>_COMPILER_WORKS to compiler information files

Since the parent commit this test result is specific to the version of
CMake.  Store it in the version-specific compiler information files
instead of CMakeCache.txt so testing can be re-done to meet the
requirements of the current version of CMake even if another version of
CMake was already used to configure the build tree.

1 files changed, 47 insertions, 37 deletions

diff --git a/Modules/CMakeTestFortranCompiler.cmake b/Modules/CMakeTestFortranCompiler.cmake
index 574dfee..e263345 100644
--- a/Modules/CMakeTestFortranCompiler.cmake
+++ b/Modules/CMakeTestFortranCompiler.cmake
@@ -1,6 +1,6 @@
 
 #=============================================================================
-# Copyright 2004-2009 Kitware, Inc.
+# Copyright 2004-2012 Kitware, Inc.
 #
 # Distributed under the OSI-approved BSD License (the "License");
 # see accompanying file Copyright.txt for details.
@@ -12,8 +12,19 @@
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
+if(CMAKE_Fortran_COMPILER_FORCED)
+  # The compiler configuration was forced by the user.
+  # Assume the user has configured all compiler information.
+  set(CMAKE_Fortran_COMPILER_WORKS TRUE)
+  return()
+endif()
+
 include(CMakeTestCompilerCommon)
 
+# Remove any cached result from an older CMake version.
+# We now store this in CMakeFortranCompiler.cmake.
+unset(CMAKE_Fortran_COMPILER_WORKS CACHE)
+
 # This file is used by EnableLanguage in cmGlobalGenerator to
 # determine that that selected Fortran compiler can actually compile
 # and link the most basic of programs.   If not, a fatal error
@@ -29,6 +40,9 @@ if(NOT CMAKE_Fortran_COMPILER_WORKS)
   try_compile(CMAKE_Fortran_COMPILER_WORKS ${CMAKE_BINARY_DIR}
     ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompiler.f
     OUTPUT_VARIABLE OUTPUT)
+  # Move result from cache to normal variable.
+  set(CMAKE_Fortran_COMPILER_WORKS ${CMAKE_Fortran_COMPILER_WORKS})
+  unset(CMAKE_Fortran_COMPILER_WORKS CACHE)
   set(FORTRAN_TEST_WAS_RUN 1)
 endif()
 
@@ -48,50 +62,46 @@ else()
       "Determining if the Fortran compiler works passed with "
       "the following output:\n${OUTPUT}\n\n")
   endif()
-  set(CMAKE_Fortran_COMPILER_WORKS 1 CACHE INTERNAL "")
 
-  if(CMAKE_Fortran_COMPILER_FORCED)
-    # The compiler configuration was forced by the user.
-    # Assume the user has configured all compiler information.
-  else()
-    # Try to identify the ABI and configure it into CMakeFortranCompiler.cmake
-    include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
-    CMAKE_DETERMINE_COMPILER_ABI(Fortran ${CMAKE_ROOT}/Modules/CMakeFortranCompilerABI.F)
+  # Try to identify the ABI and configure it into CMakeFortranCompiler.cmake
+  include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
+  CMAKE_DETERMINE_COMPILER_ABI(Fortran ${CMAKE_ROOT}/Modules/CMakeFortranCompilerABI.F)
 
-    # Test for Fortran 90 support by using an f90-specific construct.
-    if(NOT DEFINED CMAKE_Fortran_COMPILER_SUPPORTS_F90)
-      message(STATUS "Checking whether ${CMAKE_Fortran_COMPILER} supports Fortran 90")
-      file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompilerF90.f90 "
+  # Test for Fortran 90 support by using an f90-specific construct.
+  if(NOT DEFINED CMAKE_Fortran_COMPILER_SUPPORTS_F90)
+    message(STATUS "Checking whether ${CMAKE_Fortran_COMPILER} supports Fortran 90")
+    file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompilerF90.f90 "
       PROGRAM TESTFortran90
       stop = 1 ; do while ( stop .eq. 0 ) ; end do
       END PROGRAM TESTFortran90
 ")
-      try_compile(CMAKE_Fortran_COMPILER_SUPPORTS_F90 ${CMAKE_BINARY_DIR}
-        ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompilerF90.f90
-        OUTPUT_VARIABLE OUTPUT)
-      if(CMAKE_Fortran_COMPILER_SUPPORTS_F90)
-        message(STATUS "Checking whether ${CMAKE_Fortran_COMPILER} supports Fortran 90 -- yes")
-        file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-          "Determining if the Fortran compiler supports Fortran 90 passed with "
-          "the following output:\n${OUTPUT}\n\n")
-        set(CMAKE_Fortran_COMPILER_SUPPORTS_F90 1)
-      else()
-        message(STATUS "Checking whether ${CMAKE_Fortran_COMPILER} supports Fortran 90 -- no")
-        file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-          "Determining if the Fortran compiler supports Fortran 90 failed with "
-          "the following output:\n${OUTPUT}\n\n")
-        set(CMAKE_Fortran_COMPILER_SUPPORTS_F90 0)
-      endif()
-      unset(CMAKE_Fortran_COMPILER_SUPPORTS_F90 CACHE)
+    try_compile(CMAKE_Fortran_COMPILER_SUPPORTS_F90 ${CMAKE_BINARY_DIR}
+      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompilerF90.f90
+      OUTPUT_VARIABLE OUTPUT)
+    if(CMAKE_Fortran_COMPILER_SUPPORTS_F90)
+      message(STATUS "Checking whether ${CMAKE_Fortran_COMPILER} supports Fortran 90 -- yes")
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+        "Determining if the Fortran compiler supports Fortran 90 passed with "
+        "the following output:\n${OUTPUT}\n\n")
+      set(CMAKE_Fortran_COMPILER_SUPPORTS_F90 1)
+    else()
+      message(STATUS "Checking whether ${CMAKE_Fortran_COMPILER} supports Fortran 90 -- no")
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+        "Determining if the Fortran compiler supports Fortran 90 failed with "
+        "the following output:\n${OUTPUT}\n\n")
+      set(CMAKE_Fortran_COMPILER_SUPPORTS_F90 0)
     endif()
-
-    configure_file(
-      ${CMAKE_ROOT}/Modules/CMakeFortranCompiler.cmake.in
-      ${CMAKE_PLATFORM_INFO_DIR}/CMakeFortranCompiler.cmake
-      @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
-      )
-    include(${CMAKE_PLATFORM_INFO_DIR}/CMakeFortranCompiler.cmake)
+    unset(CMAKE_Fortran_COMPILER_SUPPORTS_F90 CACHE)
   endif()
+
+  # Re-configure to save learned information.
+  configure_file(
+    ${CMAKE_ROOT}/Modules/CMakeFortranCompiler.cmake.in
+    ${CMAKE_PLATFORM_INFO_DIR}/CMakeFortranCompiler.cmake
+    @ONLY IMMEDIATE # IMMEDIATE must be here for compatibility mode <= 2.0
+    )
+  include(${CMAKE_PLATFORM_INFO_DIR}/CMakeFortranCompiler.cmake)
+
   if(CMAKE_Fortran_SIZEOF_DATA_PTR)
     foreach(f ${CMAKE_Fortran_ABI_FILES})
       include(${f})