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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
# 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 "${CMAKE_CXX_COMPILER_ARG1}")
if (CMAKE_CXX_FLAGS MATCHES "(-stdlib=[^ ]+)")
set(_stdlib "${CMAKE_MATCH_1}")
endif ()
if (CMAKE_CXX_FLAGS MATCHES "(-std=[^ ]+)")
set(_stdver "${CMAKE_MATCH_1}")
endif ()
else ()
set(_compilerExecutable "${CMAKE_C_COMPILER}")
set(_arg1 "${CMAKE_C_COMPILER_ARG1}")
endif ()
separate_arguments(_arg1 NATIVE_COMMAND "${_arg1}")
execute_process(COMMAND ${_compilerExecutable} ${_arg1} ${_stdver} ${_stdlib} -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}" STREQUAL "")
list(APPEND ${_resultDefines} " ")
else()
list(APPEND ${_resultDefines} "${_value}")
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 $ENV{LANG})
set(ENV{LC_ALL} C)
set(ENV{LC_MESSAGES} C)
set(ENV{LANG} C)
# Now check for C, works for gcc and Intel compiler at least
if (NOT CMAKE_EXTRA_GENERATOR_C_SYSTEM_INCLUDE_DIRS)
if (CMAKE_C_COMPILER_ID MATCHES GNU OR CMAKE_C_COMPILER_ID MATCHES "LCC" OR CMAKE_C_COMPILER_ID MATCHES "Intel" OR CMAKE_C_COMPILER_ID MATCHES Clang)
_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c _dirs _defines)
set(CMAKE_EXTRA_GENERATOR_C_SYSTEM_INCLUDE_DIRS "${_dirs}" CACHE INTERNAL "C compiler system include directories")
set(CMAKE_EXTRA_GENERATOR_C_SYSTEM_DEFINED_MACROS "${_defines}" CACHE INTERNAL "C compiler system defined macros")
elseif ("${CMAKE_C_COMPILER_ID}" MATCHES MSVC)
set(CMAKE_EXTRA_GENERATOR_C_SYSTEM_INCLUDE_DIRS "$ENV{INCLUDE}" CACHE INTERNAL "C compiler system include directories")
endif ()
endif ()
# And now the same for C++
if (NOT CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_INCLUDE_DIRS)
if ("${CMAKE_CXX_COMPILER_ID}" MATCHES GNU OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "LCC" OR "${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 "${_defines}" CACHE INTERNAL "CXX compiler system defined macros")
elseif ("${CMAKE_CXX_COMPILER_ID}" MATCHES MSVC)
set(CMAKE_EXTRA_GENERATOR_CXX_SYSTEM_INCLUDE_DIRS "$ENV{INCLUDE}" CACHE INTERNAL "CXX compiler system include directories")
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})