# 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 () | |
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) | |
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 "${_defines}" CACHE INTERNAL "C compiler system defined macros") | |
elseif ("${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 "${CMAKE_CXX_COMPILER_ID}" MATCHES Intel OR "${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}) |