Compiler: Add infrastructure for detecting compiler wrappers

Modules/CMakeCCompiler.cmake.in

@@ -2,6 +2,7 @@ set(CMAKE_C_COMPILER "@CMAKE_C_COMPILER@")
 set(CMAKE_C_COMPILER_ARG1 "@CMAKE_C_COMPILER_ARG1@")
 set(CMAKE_C_COMPILER_ID "@CMAKE_C_COMPILER_ID@")
 set(CMAKE_C_COMPILER_VERSION "@CMAKE_C_COMPILER_VERSION@")
+set(CMAKE_C_COMPILER_WRAPPER "@CMAKE_C_COMPILER_WRAPPER@")
 set(CMAKE_C_STANDARD_COMPUTED_DEFAULT "@CMAKE_C_STANDARD_COMPUTED_DEFAULT@")
 set(CMAKE_C_COMPILE_FEATURES "@CMAKE_C_COMPILE_FEATURES@")
 set(CMAKE_C90_COMPILE_FEATURES "@CMAKE_C90_COMPILE_FEATURES@")

Modules/CMakeCInformation.cmake

@@ -18,6 +18,8 @@
 # It also loads a system - compiler - processor (or target hardware)
 # specific file, which is mainly useful for crosscompiling and embedded systems.
 
+include(CMakeLanguageInformation)
+
 # some compilers use different extensions (e.g. sdcc uses .rel)
 # so set the extension here first so it can be overridden by the compiler specific file
 if(UNIX)
@@ -60,6 +62,12 @@ if (NOT _INCLUDED_FILE)
   include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME}
     OPTIONAL RESULT_VARIABLE _INCLUDED_FILE)
 endif ()
+
+# load any compiler-wrapper specific information
+if (CMAKE_C_COMPILER_WRAPPER)
+  __cmake_include_compiler_wrapper(C)
+endif ()
+
 # We specify the compiler information in the system file for some
 # platforms, but this language may not have been enabled when the file
 # was first included.  Include it again to get the language info.

Modules/CMakeCXXCompiler.cmake.in

@@ -2,6 +2,7 @@ set(CMAKE_CXX_COMPILER "@CMAKE_CXX_COMPILER@")
 set(CMAKE_CXX_COMPILER_ARG1 "@CMAKE_CXX_COMPILER_ARG1@")
 set(CMAKE_CXX_COMPILER_ID "@CMAKE_CXX_COMPILER_ID@")
 set(CMAKE_CXX_COMPILER_VERSION "@CMAKE_CXX_COMPILER_VERSION@")
+set(CMAKE_CXX_COMPILER_WRAPPER "@CMAKE_CXX_COMPILER_WRAPPER@")
 set(CMAKE_CXX_STANDARD_COMPUTED_DEFAULT "@CMAKE_CXX_STANDARD_COMPUTED_DEFAULT@")
 set(CMAKE_CXX_COMPILE_FEATURES "@CMAKE_CXX_COMPILE_FEATURES@")
 set(CMAKE_CXX98_COMPILE_FEATURES "@CMAKE_CXX98_COMPILE_FEATURES@")

Modules/CMakeCXXInformation.cmake

@@ -18,6 +18,8 @@
 # It also loads a system - compiler - processor (or target hardware)
 # specific file, which is mainly useful for crosscompiling and embedded systems.
 
+include(CMakeLanguageInformation)
+
 # some compilers use different extensions (e.g. sdcc uses .rel)
 # so set the extension here first so it can be overridden by the compiler specific file
 if(UNIX)
@@ -59,6 +61,12 @@ if (NOT _INCLUDED_FILE)
   include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL
           RESULT_VARIABLE _INCLUDED_FILE)
 endif ()
+
+# load any compiler-wrapper specific information
+if (CMAKE_CXX_COMPILER_WRAPPER)
+  __cmake_include_compiler_wrapper(CXX)
+endif ()
+
 # We specify the compiler information in the system file for some
 # platforms, but this language may not have been enabled when the file
 # was first included.  Include it again to get the language info.

Modules/CMakeDetermineCompilerId.cmake

@@ -107,6 +107,7 @@ function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
     PARENT_SCOPE)
   set(CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX "${CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX}" PARENT_SCOPE)
   set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
+  set(CMAKE_${lang}_COMPILER_WRAPPER "${CMAKE_${lang}_COMPILER_WRAPPER}" PARENT_SCOPE)
   set(CMAKE_${lang}_SIMULATE_ID "${CMAKE_${lang}_SIMULATE_ID}" PARENT_SCOPE)
   set(CMAKE_${lang}_SIMULATE_VERSION "${CMAKE_${lang}_SIMULATE_VERSION}" PARENT_SCOPE)
   set(CMAKE_${lang}_STANDARD_COMPUTED_DEFAULT "${CMAKE_${lang}_STANDARD_COMPUTED_DEFAULT}" PARENT_SCOPE)
@@ -435,6 +436,7 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
     set(HAVE_COMPILER_VERSION_MINOR 0)
     set(HAVE_COMPILER_VERSION_PATCH 0)
     set(HAVE_COMPILER_VERSION_TWEAK 0)
+    set(COMPILER_WRAPPER)
     set(DIGIT_VALUE_1 1)
     set(DIGIT_VALUE_2 10)
     set(DIGIT_VALUE_3 100)
@@ -476,6 +478,9 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
           endif()
         endforeach()
       endforeach()
+      if("${info}" MATCHES "INFO:compiler_wrapper\\[([^]\"]*)\\]")
+        set(COMPILER_WRAPPER "${CMAKE_MATCH_1}")
+      endif()
       if("${info}" MATCHES "INFO:simulate\\[([^]\"]*)\\]")
         set(SIMULATE_ID "${CMAKE_MATCH_1}")
       endif()
@@ -588,6 +593,7 @@ function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
   set(MSVC_${lang}_ARCHITECTURE_ID "${MSVC_${lang}_ARCHITECTURE_ID}"
     PARENT_SCOPE)
   set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
+  set(CMAKE_${lang}_COMPILER_WRAPPER "${COMPILER_WRAPPER}" PARENT_SCOPE)
   set(CMAKE_${lang}_SIMULATE_ID "${CMAKE_${lang}_SIMULATE_ID}" PARENT_SCOPE)
   set(CMAKE_${lang}_SIMULATE_VERSION "${CMAKE_${lang}_SIMULATE_VERSION}" PARENT_SCOPE)
   set(CMAKE_EXECUTABLE_FORMAT "${CMAKE_EXECUTABLE_FORMAT}" PARENT_SCOPE)

Modules/CMakeFortranCompiler.cmake.in

@@ -2,6 +2,7 @@ set(CMAKE_Fortran_COMPILER "@CMAKE_Fortran_COMPILER@")
 set(CMAKE_Fortran_COMPILER_ARG1 "@CMAKE_Fortran_COMPILER_ARG1@")
 set(CMAKE_Fortran_COMPILER_ID "@CMAKE_Fortran_COMPILER_ID@")
 set(CMAKE_Fortran_COMPILER_VERSION "@CMAKE_Fortran_COMPILER_VERSION@")
+set(CMAKE_Fortran_COMPILER_WRAPPER "@CMAKE_Fortran_COMPILER_WRAPPER@")
 set(CMAKE_Fortran_PLATFORM_ID "@CMAKE_Fortran_PLATFORM_ID@")
 set(CMAKE_Fortran_SIMULATE_ID "@CMAKE_Fortran_SIMULATE_ID@")
 set(CMAKE_Fortran_SIMULATE_VERSION "@CMAKE_Fortran_SIMULATE_VERSION@")

Modules/CMakeFortranInformation.cmake

@@ -12,6 +12,8 @@
 # (To distribute this file outside of CMake, substitute the full
 #  License text for the above reference.)
 
+include(CMakeLanguageInformation)
+
 # This file sets the basic flags for the Fortran language in CMake.
 # It also loads the available platform file for the system-compiler
 # if it exists.
@@ -36,6 +38,12 @@ if (NOT _INCLUDED_FILE)
   include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_BASE_NAME} OPTIONAL
           RESULT_VARIABLE _INCLUDED_FILE)
 endif ()
+
+# load any compiler-wrapper specific information
+if (CMAKE_Fortran_COMPILER_WRAPPER)
+  __cmake_include_compiler_wrapper(Fortran)
+endif ()
+
 # We specify the compiler information in the system file for some
 # platforms, but this language may not have been enabled when the file
 # was first included.  Include it again to get the language info.

Modules/CMakeLanguageInformation.cmake

@@ -0,0 +1,37 @@
+
+#=============================================================================
+# Copyright 2015 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# This file contains common code blocks used by all the language information
+# files
+
+# load any compiler-wrapper specific information
+macro(__cmake_include_compiler_wrapper lang)
+  set(_INCLUDED_WRAPPER_FILE 0)
+  if (CMAKE_${lang}_COMPILER_ID)
+    include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_${lang}_COMPILER_WRAPPER}-${CMAKE_${lang}_COMPILER_ID}-${lang} OPTIONAL RESULT_VARIABLE _INCLUDED_WRAPPER_FILE)
+  endif()
+  if (NOT _INCLUDED_WRAPPER_FILE)
+    include(Platform/${CMAKE_SYSTEM_NAME}-${CMAKE_${lang}_COMPILER_WRAPPER}-${lang} OPTIONAL RESULT_VARIABLE _INCLUDED_WRAPPER_FILE)
+  endif ()
+
+  # No platform - wrapper - lang information so maybe there's just wrapper - lang information
+  if(NOT _INCLUDED_WRAPPER_FILE)
+    if (CMAKE_${lang}_COMPILER_ID)
+      include(Compiler/${CMAKE_${lang}_COMPILER_WRAPPER}-${CMAKE_${lang}_COMPILER_ID}-${lang} OPTIONAL RESULT_VARIABLE _INCLUDED_WRAPPER_FILE)
+    endif()
+    if (NOT _INCLUDED_WRAPPER_FILE)
+      include(Compiler/${CMAKE_${lang}_COMPILER_WRAPPER}-${lang} OPTIONAL RESULT_VARIABLE _INCLUDED_WRAPPER_FILE)
+    endif ()
+  endif ()
+endmacro ()