#============================================================================= # Copyright 2009 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 is included by CMakeFindEclipseCDT4.cmake and CMakeFindCodeBlocks.cmake # The Eclipse and the CodeBlocks generators need to know the standard include path # so that they can find the headers at runtime and parsing etc. works better # This is done here by actually running gcc with the options so it prints its # system include directories, which are parsed then and stored in the cache. macro(_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang _resultIncludeDirs _resultDefines) set(${_resultIncludeDirs}) set(_gccOutput) file(WRITE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy" "\n" ) if (${_lang} STREQUAL "c++") set(_compilerExecutable "${CMAKE_CXX_COMPILER}") set(_arg1 "${CMAKE_CXX_COMPILER_ARG1}") else () set(_compilerExecutable "${CMAKE_C_COMPILER}") set(_arg1 "${CMAKE_C_COMPILER_ARG1}") endif () execute_process(COMMAND ${_compilerExecutable} ${_arg1} -v -E -x ${_lang} -dD dummy WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/CMakeFiles ERROR_VARIABLE _gccOutput OUTPUT_VARIABLE _gccStdout ) file(REMOVE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy") # First find the system include dirs: if( "${_gccOutput}" MATCHES "> search starts here[^\n]+\n *(.+ *\n) *End of (search) list" ) # split the output into lines and then remove leading and trailing spaces from each of them: string(REGEX MATCHALL "[^\n]+\n" _includeLines "${CMAKE_MATCH_1}") foreach(nextLine ${_includeLines}) # on OSX, gcc says things like this: "/System/Library/Frameworks (framework directory)", strip the last part string(REGEX REPLACE "\\(framework directory\\)" "" nextLineNoFramework "${nextLine}") # strip spaces at the beginning and the end string(STRIP "${nextLineNoFramework}" _includePath) list(APPEND ${_resultIncludeDirs} "${_includePath}") endforeach() endif() # now find the builtin macros: string(REGEX MATCHALL "#define[^\n]+\n" _defineLines "${_gccStdout}") # A few example lines which the regexp below has to match properly: # #define MAX(a,b) ((a) > (b) ? (a) : (b)) # #define __fastcall __attribute__((__fastcall__)) # #define FOO (23) # #define __UINTMAX_TYPE__ long long unsigned int # #define __UINTMAX_TYPE__ long long unsigned int # #define __i386__ 1 foreach(nextLine ${_defineLines}) string(REGEX MATCH "^#define +([A-Za-z_][A-Za-z0-9_]*)(\\([^\\)]+\\))? +(.+) *$" _dummy "${nextLine}") set(_name "${CMAKE_MATCH_1}${CMAKE_MATCH_2}") string(STRIP "${CMAKE_MATCH_3}" _value) #message(STATUS "m1: -${CMAKE_MATCH_1}- m2: -${CMAKE_MATCH_2}- m3: -${CMAKE_MATCH_3}-") list(APPEND ${_resultDefines} "${_name}") if(_value) list(APPEND ${_resultDefines} "${_value}") else() list(APPEND ${_resultDefines} " ") endif() endforeach() endmacro() # Save the current LC_ALL, LC_MESSAGES, and LANG environment variables and set them # to "C" that way GCC's "search starts here" text is in English and we can grok it. set(_orig_lc_all $ENV{LC_ALL}) set(_orig_lc_messages $ENV{LC_MESSAGES}) set(_orig_lang $ENV{LANG}) set(ENV{LC_ALL} C) set(ENV{LC_MESSAGES} C) set(ENV{LANG} C) # Now check for C, works for gcc and Intel compiler at least if (NOT CMAKE_EXTRA_GENERATOR_C_SYSTEM_INCLUDE_DIRS) if ("${CMAKE_C_COMPILER_ID}" MATCHES GNU OR "${CMAKE_C_COMPILER_ID}" MATCHES Intel OR "${CMAKE_C_COMPILER_ID}" MATCHES Clang) _DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c _dirs _defines) set(CMAKE_EXTRA_GENERATOR_C_SYSTEM_INCLUDE_DIRS "${_dirs}" CACHE INTERNAL "C compiler system include directories") set(CMAKE_EXTRA_GENERATOR_C_SYSTEM_DEFINED_MACROS "${_defines}" CACHE INTERNAL "C compiler system defined macros") endif () endif () # And now the same for C++ if (NOT CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_INCLUDE_DIRS) if ("${CMAKE_CXX_COMPILER_ID}" MATCHES GNU OR "${CMAKE_CXX_COMPILER_ID}" MATCHES Intel OR "${CMAKE_CXX_COMPILER_ID}" MATCHES Clang) _DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c++ _dirs _defines) set(CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_INCLUDE_DIRS "${_dirs}" CACHE INTERNAL "CXX compiler system include directories") set(CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_DEFINED_MACROS "${_defines}" CACHE INTERNAL "CXX compiler system defined macros") endif () endif () # Restore original LC_ALL, LC_MESSAGES, and LANG set(ENV{LC_ALL} ${_orig_lc_all}) set(ENV{LC_MESSAGES} ${_orig_lc_messages}) set(ENV{LANG} ${_orig_lang})