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CMake/Modules/CMakeDetermineCompilerId.cmake
Stephen Kelly 9d285600d4 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.
2014-05-07 14:00:00 +02:00

619 lines
24 KiB
CMake
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#=============================================================================
# Copyright 2007-2009 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.)
# Function to compile a source file to identify the compiler. This is
# used internally by CMake and should not be included by user code.
# If successful, sets CMAKE_<lang>_COMPILER_ID and CMAKE_<lang>_PLATFORM_ID
function(CMAKE_DETERMINE_COMPILER_ID lang flagvar src)
# Make sure the compiler arguments are clean.
string(STRIP "${CMAKE_${lang}_COMPILER_ARG1}" CMAKE_${lang}_COMPILER_ID_ARG1)
string(REGEX REPLACE " +" ";" CMAKE_${lang}_COMPILER_ID_ARG1 "${CMAKE_${lang}_COMPILER_ID_ARG1}")
# Make sure user-specified compiler flags are used.
if(CMAKE_${lang}_FLAGS)
set(CMAKE_${lang}_COMPILER_ID_FLAGS ${CMAKE_${lang}_FLAGS})
else()
set(CMAKE_${lang}_COMPILER_ID_FLAGS $ENV{${flagvar}})
endif()
string(REPLACE " " ";" CMAKE_${lang}_COMPILER_ID_FLAGS_LIST "${CMAKE_${lang}_COMPILER_ID_FLAGS}")
# Compute the directory in which to run the test.
set(CMAKE_${lang}_COMPILER_ID_DIR ${CMAKE_PLATFORM_INFO_DIR}/CompilerId${lang})
# Try building with no extra flags and then try each set
# of helper flags. Stop when the compiler is identified.
foreach(flags "" ${CMAKE_${lang}_COMPILER_ID_TEST_FLAGS})
if(NOT CMAKE_${lang}_COMPILER_ID)
CMAKE_DETERMINE_COMPILER_ID_BUILD("${lang}" "${flags}" "${src}")
foreach(file ${COMPILER_${lang}_PRODUCED_FILES})
CMAKE_DETERMINE_COMPILER_ID_CHECK("${lang}" "${CMAKE_${lang}_COMPILER_ID_DIR}/${file}" "${src}")
endforeach()
endif()
endforeach()
# If the compiler is still unknown, try to query its vendor.
if(CMAKE_${lang}_COMPILER AND NOT CMAKE_${lang}_COMPILER_ID)
CMAKE_DETERMINE_COMPILER_ID_VENDOR(${lang})
endif()
if (COMPILER_QNXNTO AND CMAKE_${lang}_COMPILER_ID STREQUAL GNU)
execute_process(
COMMAND "${CMAKE_${lang}_COMPILER}"
-V
OUTPUT_VARIABLE output ERROR_VARIABLE output
RESULT_VARIABLE result
TIMEOUT 10
)
if (output MATCHES "targets available")
set(CMAKE_${lang}_COMPILER_ID QCC)
# http://community.qnx.com/sf/discussion/do/listPosts/projects.community/discussion.qnx_momentics_community_support.topc3555?_pagenum=2
# The qcc driver does not itself have a version.
endif()
endif()
# if the format is unknown after all files have been checked, put "Unknown" in the cache
if(NOT CMAKE_EXECUTABLE_FORMAT)
set(CMAKE_EXECUTABLE_FORMAT "Unknown" CACHE INTERNAL "Executable file format")
endif()
# Display the final identification result.
if(CMAKE_${lang}_COMPILER_ID)
if(CMAKE_${lang}_COMPILER_VERSION)
set(_version " ${CMAKE_${lang}_COMPILER_VERSION}")
else()
set(_version "")
endif()
message(STATUS "The ${lang} compiler identification is "
"${CMAKE_${lang}_COMPILER_ID}${_version}")
else()
message(STATUS "The ${lang} compiler identification is unknown")
endif()
# Check if compiler id detection gave us the compiler tool.
if(CMAKE_${lang}_COMPILER_ID_TOOL)
set(CMAKE_${lang}_COMPILER "${CMAKE_${lang}_COMPILER_ID_TOOL}" PARENT_SCOPE)
elseif(NOT CMAKE_${lang}_COMPILER)
set(CMAKE_${lang}_COMPILER "CMAKE_${lang}_COMPILER-NOTFOUND" PARENT_SCOPE)
endif()
set(CMAKE_${lang}_COMPILER_ID "${CMAKE_${lang}_COMPILER_ID}" PARENT_SCOPE)
set(CMAKE_${lang}_PLATFORM_ID "${CMAKE_${lang}_PLATFORM_ID}" PARENT_SCOPE)
set(MSVC_${lang}_ARCHITECTURE_ID "${MSVC_${lang}_ARCHITECTURE_ID}"
PARENT_SCOPE)
set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
set(CMAKE_${lang}_SIMULATE_ID "${CMAKE_${lang}_SIMULATE_ID}" PARENT_SCOPE)
set(CMAKE_${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}")
endfunction()
#-----------------------------------------------------------------------------
# Function to build the compiler id source file and look for output
# files.
function(CMAKE_DETERMINE_COMPILER_ID_BUILD lang testflags src)
# Create a clean working directory.
file(REMOVE_RECURSE ${CMAKE_${lang}_COMPILER_ID_DIR})
file(MAKE_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR})
CMAKE_DETERMINE_COMPILER_ID_WRITE("${lang}" "${src}")
# Construct a description of this test case.
set(COMPILER_DESCRIPTION
"Compiler: ${CMAKE_${lang}_COMPILER} ${CMAKE_${lang}_COMPILER_ID_ARG1}
Build flags: ${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
Id flags: ${testflags}
")
# Compile the compiler identification source.
if(CMAKE_GENERATOR STREQUAL "Visual Studio 6" AND
lang STREQUAL "Fortran")
set(CMAKE_${lang}_COMPILER_ID_RESULT 1)
set(CMAKE_${lang}_COMPILER_ID_OUTPUT "No Intel Fortran in VS 6")
elseif("${CMAKE_GENERATOR}" MATCHES "Visual Studio ([0-9]+)")
set(vs_version ${CMAKE_MATCH_1})
set(id_platform ${CMAKE_VS_PLATFORM_NAME})
set(id_lang "${lang}")
set(id_cl cl.exe)
if(lang STREQUAL Fortran)
set(v Intel)
set(ext vfproj)
set(id_cl ifort.exe)
elseif(NOT "${vs_version}" VERSION_LESS 10)
set(v 10)
set(ext vcxproj)
elseif(NOT "${vs_version}" VERSION_LESS 7)
set(id_version ${vs_version}.00)
set(v 7)
set(ext vcproj)
else()
set(v 6)
set(ext dsp)
endif()
if("${id_platform}" STREQUAL "Itanium")
set(id_platform ia64)
endif()
if(CMAKE_VS_PLATFORM_TOOLSET)
set(id_toolset "<PlatformToolset>${CMAKE_VS_PLATFORM_TOOLSET}</PlatformToolset>")
if(CMAKE_VS_PLATFORM_TOOLSET MATCHES "Intel")
set(id_cl icl.exe)
endif()
else()
set(id_toolset "")
endif()
if(CMAKE_VS_WINCE_VERSION)
set(id_entrypoint "mainACRTStartup")
if("${vs_version}" VERSION_LESS 9)
set(id_subsystem 9)
else()
set(id_subsystem 8)
endif()
else()
set(id_subsystem 1)
endif()
set(id_dir ${CMAKE_${lang}_COMPILER_ID_DIR})
get_filename_component(id_src "${src}" NAME)
configure_file(${CMAKE_ROOT}/Modules/CompilerId/VS-${v}.${ext}.in
${id_dir}/CompilerId${lang}.${ext} @ONLY)
if(CMAKE_VS_MSBUILD_COMMAND AND NOT lang STREQUAL "Fortran")
set(command "${CMAKE_VS_MSBUILD_COMMAND}" "CompilerId${lang}.${ext}"
"/p:Configuration=Debug" "/p:Platform=${id_platform}" "/p:VisualStudioVersion=${vs_version}.0"
)
elseif(CMAKE_VS_DEVENV_COMMAND)
set(command "${CMAKE_VS_DEVENV_COMMAND}" "CompilerId${lang}.${ext}" "/build" "Debug")
elseif(CMAKE_VS_MSDEV_COMMAND)
set(command "${CMAKE_VS_MSDEV_COMMAND}" "CompilerId${lang}.${ext}" "/make")
else()
set(command "")
endif()
if(command)
execute_process(
COMMAND ${command}
WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
ERROR_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
RESULT_VARIABLE CMAKE_${lang}_COMPILER_ID_RESULT
)
else()
set(CMAKE_${lang}_COMPILER_ID_RESULT 1)
set(CMAKE_${lang}_COMPILER_ID_OUTPUT "VS environment not known to support ${lang}")
endif()
# Match the compiler location line printed out.
if("${CMAKE_${lang}_COMPILER_ID_OUTPUT}" MATCHES "CMAKE_${lang}_COMPILER=([^%\r\n]+)[\r\n]")
# Strip VS diagnostic output from the end of the line.
string(REGEX REPLACE " \\(TaskId:[0-9]*\\)$" "" _comp "${CMAKE_MATCH_1}")
if(EXISTS "${_comp}")
file(TO_CMAKE_PATH "${_comp}" _comp)
set(CMAKE_${lang}_COMPILER_ID_TOOL "${_comp}" PARENT_SCOPE)
endif()
endif()
elseif("${CMAKE_GENERATOR}" MATCHES "Xcode")
set(id_lang "${lang}")
set(id_type ${CMAKE_${lang}_COMPILER_XCODE_TYPE})
set(id_dir ${CMAKE_${lang}_COMPILER_ID_DIR})
get_filename_component(id_src "${src}" NAME)
if(CMAKE_XCODE_PLATFORM_TOOLSET)
set(id_toolset "GCC_VERSION = ${CMAKE_XCODE_PLATFORM_TOOLSET};")
else()
set(id_toolset "")
endif()
if(CMAKE_OSX_DEPLOYMENT_TARGET)
set(id_deployment_target
"MACOSX_DEPLOYMENT_TARGET = \"${CMAKE_OSX_DEPLOYMENT_TARGET}\";")
else()
set(id_deployment_target "")
endif()
if(CMAKE_OSX_SYSROOT)
set(id_sdkroot "SDKROOT = \"${CMAKE_OSX_SYSROOT}\";")
else()
set(id_sdkroot "")
endif()
if(NOT ${XCODE_VERSION} VERSION_LESS 3)
set(v 3)
set(ext xcodeproj)
elseif(NOT ${XCODE_VERSION} VERSION_LESS 2)
set(v 2)
set(ext xcodeproj)
else()
set(v 1)
set(ext xcode)
endif()
configure_file(${CMAKE_ROOT}/Modules/CompilerId/Xcode-${v}.pbxproj.in
${id_dir}/CompilerId${lang}.${ext}/project.pbxproj @ONLY)
unset(_ENV_MACOSX_DEPLOYMENT_TARGET)
if(DEFINED ENV{MACOSX_DEPLOYMENT_TARGET})
set(_ENV_MACOSX_DEPLOYMENT_TARGET "$ENV{MACOSX_DEPLOYMENT_TARGET}")
set(ENV{MACOSX_DEPLOYMENT_TARGET} "")
endif()
execute_process(COMMAND xcodebuild
WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
ERROR_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
RESULT_VARIABLE CMAKE_${lang}_COMPILER_ID_RESULT
)
if(DEFINED _ENV_MACOSX_DEPLOYMENT_TARGET)
set(ENV{MACOSX_DEPLOYMENT_TARGET} "${_ENV_MACOSX_DEPLOYMENT_TARGET}")
endif()
# Match the link line from xcodebuild output of the form
# Ld ...
# ...
# /path/to/cc ...CompilerId${lang}/...
# to extract the compiler front-end for the language.
if("${CMAKE_${lang}_COMPILER_ID_OUTPUT}" MATCHES "\nLd[^\n]*(\n[ \t]+[^\n]*)*\n[ \t]+([^ \t\r\n]+)[^\r\n]*-o[^\r\n]*CompilerId${lang}/(\\./)?CompilerId${lang}[ \t\n\\\"]")
set(_comp "${CMAKE_MATCH_2}")
if(EXISTS "${_comp}")
set(CMAKE_${lang}_COMPILER_ID_TOOL "${_comp}" PARENT_SCOPE)
endif()
endif()
else()
if(COMMAND EXECUTE_PROCESS)
execute_process(
COMMAND "${CMAKE_${lang}_COMPILER}"
${CMAKE_${lang}_COMPILER_ID_ARG1}
${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
${testflags}
"${src}"
WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
ERROR_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
RESULT_VARIABLE CMAKE_${lang}_COMPILER_ID_RESULT
)
else()
exec_program(
"${CMAKE_${lang}_COMPILER}" ${CMAKE_${lang}_COMPILER_ID_DIR}
ARGS ${CMAKE_${lang}_COMPILER_ID_ARG1}
${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
${testflags}
\"${src}\"
OUTPUT_VARIABLE CMAKE_${lang}_COMPILER_ID_OUTPUT
RETURN_VALUE CMAKE_${lang}_COMPILER_ID_RESULT
)
endif()
endif()
# Check the result of compilation.
if(CMAKE_${lang}_COMPILER_ID_RESULT
# Intel Fortran warns and ignores preprocessor lines without /fpp
OR CMAKE_${lang}_COMPILER_ID_OUTPUT MATCHES "Bad # preprocessor line"
)
# Compilation failed.
set(MSG
"Compiling the ${lang} compiler identification source file \"${src}\" failed.
${COMPILER_DESCRIPTION}
The output was:
${CMAKE_${lang}_COMPILER_ID_RESULT}
${CMAKE_${lang}_COMPILER_ID_OUTPUT}
")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "${MSG}")
#if(NOT CMAKE_${lang}_COMPILER_ID_ALLOW_FAIL)
# message(FATAL_ERROR "${MSG}")
#endif()
# No output files should be inspected.
set(COMPILER_${lang}_PRODUCED_FILES)
else()
# Compilation succeeded.
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Compiling the ${lang} compiler identification source file \"${src}\" succeeded.
${COMPILER_DESCRIPTION}
The output was:
${CMAKE_${lang}_COMPILER_ID_RESULT}
${CMAKE_${lang}_COMPILER_ID_OUTPUT}
")
# Find the executable produced by the compiler, try all files in the
# binary dir.
file(GLOB files
RELATIVE ${CMAKE_${lang}_COMPILER_ID_DIR}
${CMAKE_${lang}_COMPILER_ID_DIR}/*)
list(REMOVE_ITEM files "${src}")
set(COMPILER_${lang}_PRODUCED_FILES "")
foreach(file ${files})
if(NOT IS_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}/${file})
list(APPEND COMPILER_${lang}_PRODUCED_FILES ${file})
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Compilation of the ${lang} compiler identification source \""
"${src}\" produced \"${file}\"\n\n")
endif()
endforeach()
if(NOT COMPILER_${lang}_PRODUCED_FILES)
# No executable was found.
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Compilation of the ${lang} compiler identification source \""
"${src}\" did not produce an executable in \""
"${CMAKE_${lang}_COMPILER_ID_DIR}\".\n\n")
endif()
endif()
# Return the files produced by the compilation.
set(COMPILER_${lang}_PRODUCED_FILES "${COMPILER_${lang}_PRODUCED_FILES}" PARENT_SCOPE)
endfunction()
#-----------------------------------------------------------------------------
# Function to extract the compiler id from an executable.
function(CMAKE_DETERMINE_COMPILER_ID_CHECK lang file)
# Look for a compiler id if not yet known.
if(NOT CMAKE_${lang}_COMPILER_ID)
# Read the compiler identification string from the executable file.
set(COMPILER_ID)
set(COMPILER_VERSION)
set(PLATFORM_ID)
set(ARCHITECTURE_ID)
set(SIMULATE_ID)
set(SIMULATE_VERSION)
file(STRINGS ${file}
CMAKE_${lang}_COMPILER_ID_STRINGS LIMIT_COUNT 6 REGEX "INFO:")
set(COMPILER_ID_TWICE)
foreach(info ${CMAKE_${lang}_COMPILER_ID_STRINGS})
if("${info}" MATCHES "INFO:compiler\\[([^]\"]*)\\]")
if(COMPILER_ID)
set(COMPILER_ID_TWICE 1)
endif()
set(COMPILER_ID "${CMAKE_MATCH_1}")
endif()
if("${info}" MATCHES "INFO:platform\\[([^]\"]*)\\]")
set(PLATFORM_ID "${CMAKE_MATCH_1}")
endif()
if("${info}" MATCHES "INFO:arch\\[([^]\"]*)\\]")
set(ARCHITECTURE_ID "${CMAKE_MATCH_1}")
endif()
if("${info}" MATCHES "INFO:compiler_version\\[([^]\"]*)\\]")
string(REGEX REPLACE "^0+([0-9])" "\\1" COMPILER_VERSION "${CMAKE_MATCH_1}")
string(REGEX REPLACE "\\.0+([0-9])" ".\\1" COMPILER_VERSION "${COMPILER_VERSION}")
endif()
if("${info}" MATCHES "INFO:simulate\\[([^]\"]*)\\]")
set(SIMULATE_ID "${CMAKE_MATCH_1}")
endif()
if("${info}" MATCHES "INFO:simulate_version\\[([^]\"]*)\\]")
string(REGEX REPLACE "^0+([0-9])" "\\1" SIMULATE_VERSION "${CMAKE_MATCH_1}")
string(REGEX REPLACE "\\.0+([0-9])" ".\\1" SIMULATE_VERSION "${SIMULATE_VERSION}")
endif()
if("${info}" MATCHES "INFO:qnxnto")
set(COMPILER_QNXNTO 1)
endif()
endforeach()
# Detect the exact architecture from the PE header.
if(WIN32)
# The offset to the PE signature is stored at 0x3c.
file(READ ${file} peoffsethex LIMIT 1 OFFSET 60 HEX)
string(SUBSTRING "${peoffsethex}" 0 1 peoffsethex1)
string(SUBSTRING "${peoffsethex}" 1 1 peoffsethex2)
set(peoffsetexpression "${peoffsethex1} * 16 + ${peoffsethex2}")
string(REPLACE "a" "10" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "b" "11" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "c" "12" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "d" "13" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "e" "14" peoffsetexpression "${peoffsetexpression}")
string(REPLACE "f" "15" peoffsetexpression "${peoffsetexpression}")
math(EXPR peoffset "${peoffsetexpression}")
file(READ ${file} peheader LIMIT 6 OFFSET ${peoffset} HEX)
if(peheader STREQUAL "50450000a201")
set(ARCHITECTURE_ID "SH3")
elseif(peheader STREQUAL "50450000a301")
set(ARCHITECTURE_ID "SH3DSP")
elseif(peheader STREQUAL "50450000a601")
set(ARCHITECTURE_ID "SH4")
elseif(peheader STREQUAL "50450000a801")
set(ARCHITECTURE_ID "SH5")
elseif(peheader STREQUAL "50450000c201")
set(ARCHITECTURE_ID "THUMB")
endif()
endif()
# Check if a valid compiler and platform were found.
if(COMPILER_ID AND NOT COMPILER_ID_TWICE)
set(CMAKE_${lang}_COMPILER_ID "${COMPILER_ID}")
set(CMAKE_${lang}_PLATFORM_ID "${PLATFORM_ID}")
set(MSVC_${lang}_ARCHITECTURE_ID "${ARCHITECTURE_ID}")
set(CMAKE_${lang}_COMPILER_VERSION "${COMPILER_VERSION}")
set(CMAKE_${lang}_SIMULATE_ID "${SIMULATE_ID}")
set(CMAKE_${lang}_SIMULATE_VERSION "${SIMULATE_VERSION}")
endif()
# Check the compiler identification string.
if(CMAKE_${lang}_COMPILER_ID)
# The compiler identification was found.
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"The ${lang} compiler identification is ${CMAKE_${lang}_COMPILER_ID}, found in \""
"${file}\"\n\n")
else()
# The compiler identification could not be found.
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"The ${lang} compiler identification could not be found in \""
"${file}\"\n\n")
endif()
endif()
# try to figure out the executable format: ELF, COFF, Mach-O
if(NOT CMAKE_EXECUTABLE_FORMAT)
file(READ ${file} CMAKE_EXECUTABLE_MAGIC LIMIT 4 HEX)
# ELF files start with 0x7f"ELF"
if("${CMAKE_EXECUTABLE_MAGIC}" STREQUAL "7f454c46")
set(CMAKE_EXECUTABLE_FORMAT "ELF" CACHE INTERNAL "Executable file format")
endif()
# # COFF (.exe) files start with "MZ"
# if("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "4d5a....")
# set(CMAKE_EXECUTABLE_FORMAT "COFF" CACHE STRING "Executable file format")
# endif()
#
# # Mach-O files start with CAFEBABE or FEEDFACE, according to http://radio.weblogs.com/0100490/2003/01/28.html
# if("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "cafebabe")
# set(CMAKE_EXECUTABLE_FORMAT "MACHO" CACHE STRING "Executable file format")
# endif()
# if("${CMAKE_EXECUTABLE_MAGIC}" MATCHES "feedface")
# set(CMAKE_EXECUTABLE_FORMAT "MACHO" CACHE STRING "Executable file format")
# endif()
endif()
if(NOT DEFINED CMAKE_EXECUTABLE_FORMAT)
set(CMAKE_EXECUTABLE_FORMAT)
endif()
# Return the information extracted.
set(CMAKE_${lang}_COMPILER_ID "${CMAKE_${lang}_COMPILER_ID}" PARENT_SCOPE)
set(CMAKE_${lang}_PLATFORM_ID "${CMAKE_${lang}_PLATFORM_ID}" PARENT_SCOPE)
set(MSVC_${lang}_ARCHITECTURE_ID "${MSVC_${lang}_ARCHITECTURE_ID}"
PARENT_SCOPE)
set(CMAKE_${lang}_COMPILER_VERSION "${CMAKE_${lang}_COMPILER_VERSION}" PARENT_SCOPE)
set(CMAKE_${lang}_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)
set(COMPILER_QNXNTO "${COMPILER_QNXNTO}" PARENT_SCOPE)
endfunction()
#-----------------------------------------------------------------------------
# Function to query the compiler vendor.
# This uses a table with entries of the form
# list(APPEND CMAKE_${lang}_COMPILER_ID_VENDORS ${vendor})
# set(CMAKE_${lang}_COMPILER_ID_VENDOR_FLAGS_${vendor} -some-vendor-flag)
# set(CMAKE_${lang}_COMPILER_ID_VENDOR_REGEX_${vendor} "Some Vendor Output")
# We try running the compiler with the flag for each vendor and
# matching its regular expression in the output.
function(CMAKE_DETERMINE_COMPILER_ID_VENDOR lang)
if(NOT CMAKE_${lang}_COMPILER_ID_DIR)
# We get here when this function is called not from within CMAKE_DETERMINE_COMPILER_ID()
# This is done e.g. for detecting the compiler ID for assemblers.
# Compute the directory in which to run the test and Create a clean working directory.
set(CMAKE_${lang}_COMPILER_ID_DIR ${CMAKE_PLATFORM_INFO_DIR}/CompilerId${lang})
file(REMOVE_RECURSE ${CMAKE_${lang}_COMPILER_ID_DIR})
file(MAKE_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR})
endif()
foreach(vendor ${CMAKE_${lang}_COMPILER_ID_VENDORS})
set(flags ${CMAKE_${lang}_COMPILER_ID_VENDOR_FLAGS_${vendor}})
set(regex ${CMAKE_${lang}_COMPILER_ID_VENDOR_REGEX_${vendor}})
execute_process(
COMMAND "${CMAKE_${lang}_COMPILER}"
${CMAKE_${lang}_COMPILER_ID_ARG1}
${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}
${flags}
WORKING_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}
OUTPUT_VARIABLE output ERROR_VARIABLE output
RESULT_VARIABLE result
TIMEOUT 10
)
if("${output}" MATCHES "${regex}")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
"matched \"${regex}\":\n${output}")
set(CMAKE_${lang}_COMPILER_ID "${vendor}" PARENT_SCOPE)
break()
else()
if("${result}" MATCHES "timeout")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
"terminated after 10 s due to timeout.")
else()
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Checking whether the ${lang} compiler is ${vendor} using \"${flags}\" "
"did not match \"${regex}\":\n${output}")
endif()
endif()
endforeach()
endfunction()
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