Project: Generate the CXX compiler Id test from multiple files.

This will allow sharing of the logic of the order to test compilers in
and the preprocessor macros used to do that and to determine the
version components.

1 files changed, 77 insertions, 0 deletions

diff --git a/Modules/CMakeDetermineCompilerId.cmake b/Modules/CMakeDetermineCompilerId.cmake
index 17f27b3..ddaa8ef 100644
--- a/Modules/CMakeDetermineCompilerId.cmake
+++ b/Modules/CMakeDetermineCompilerId.cmake
@@ -97,11 +97,88 @@ function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
   set(CMAKE_${lang}_SIMULATE_VERSION "${CMAKE_${lang}_SIMULATE_VERSION}" PARENT_SCOPE)
 endfunction()
 
+function(_readFile file)
+  include(${file})
+  get_filename_component(name ${file} NAME_WE)
+  string(REGEX REPLACE "-.*" "" CompilerId ${name})
+  set(_compiler_id_version_compute_${CompilerId} ${_compiler_id_version_compute} PARENT_SCOPE)
+  set(_compiler_id_pp_test_${CompilerId} ${_compiler_id_pp_test} PARENT_SCOPE)
+endfunction()
+
 #-----------------------------------------------------------------------------
 # Function to write the compiler id source file.
 function(CMAKE_DETERMINE_COMPILER_ID_WRITE lang src)
   find_file(src_in ${src}.in PATHS ${CMAKE_ROOT}/Modules ${CMAKE_MODULE_PATH} NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
   file(READ ${src_in} ID_CONTENT_IN)
+
+  file(GLOB lang_files
+    "${CMAKE_ROOT}/Modules/Compiler/*-${lang}-DetermineCompiler.cmake")
+
+  if (NOT lang STREQUAL Fortran)
+    file(GLOB non_lang_files
+      "${CMAKE_ROOT}/Modules/Compiler/*-${lang}-DetermineCompiler.cmake")
+  endif()
+
+  set(files ${lang_files} ${non_lang_files})
+  if (files)
+    foreach(file ${files})
+      _readFile(${file})
+    endforeach()
+    set(pp_if "#if")
+    set(CMAKE_CXX_COMPILER_ID_CONTENT "/* Version number components: V=Version, R=Revision, P=Patch
+   Version date components:   YYYY=Year, MM=Month,   DD=Day  */\n")
+
+    foreach(Id
+        Comeau
+        Intel
+        PathScale
+        AppleClang
+        Clang
+        Embarcadero
+        Borland
+        Watcom
+        OpenWatcom
+        SunPro
+        HP
+        Compaq
+        zOS
+        XL
+        VisualAge
+        PGI
+        Cray
+        TI
+        SCO
+        GNU
+        MSVC
+        ADSP
+        IAR
+        MIPSpro)
+      if (NOT _compiler_id_pp_test_${Id})
+        message(FATAL_ERROR "No test for \"${Id}\"")
+      endif()
+      set(id_content "${pp_if} ${_compiler_id_pp_test_${Id}}\n# define COMPILER_ID \"${Id}\"${_compiler_id_version_compute_${Id}}\n")
+      set(CMAKE_CXX_COMPILER_ID_CONTENT "${CMAKE_CXX_COMPILER_ID_CONTENT}\n${id_content}")
+      set(pp_if "#elif")
+    endforeach()
+
+    set(platform_compiler_detection "
+/* These compilers are either not known or too old to define an
+  identification macro.  Try to identify the platform and guess that
+  it is the native compiler.  */
+#elif defined(__sgi)
+# define COMPILER_ID \"MIPSpro\"
+
+#elif defined(__hpux) || defined(__hpua)
+# define COMPILER_ID \"HP\"
+
+#else /* unknown compiler */
+# define COMPILER_ID \"\"
+
+#endif")
+
+    set(CMAKE_CXX_COMPILER_ID_CONTENT "${CMAKE_CXX_COMPILER_ID_CONTENT}\n${platform_compiler_detection}")
+  endif()
+
   unset(src_in CACHE)
   string(CONFIGURE "${ID_CONTENT_IN}" ID_CONTENT_OUT @ONLY)
   file(WRITE ${CMAKE_${lang}_COMPILER_ID_DIR}/${src} "${ID_CONTENT_OUT}")