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cmake/Modules/CMakeDetermineCompilerId.cmake

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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.
# 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(userflags "${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}" "")
foreach(testflags ${CMAKE_${lang}_COMPILER_ID_TEST_FLAGS_FIRST}
""
${CMAKE_${lang}_COMPILER_ID_TEST_FLAGS})
CMAKE_DETERMINE_COMPILER_ID_BUILD("${lang}" "${testflags}" "${userflags}" "${src}")
CMAKE_DETERMINE_COMPILER_ID_MATCH_VENDOR("${lang}" "${COMPILER_${lang}_PRODUCED_OUTPUT}")
if(CMAKE_${lang}_COMPILER_ID)
break()
endif()
foreach(file ${COMPILER_${lang}_PRODUCED_FILES})
CMAKE_DETERMINE_COMPILER_ID_CHECK("${lang}" "${CMAKE_${lang}_COMPILER_ID_DIR}/${file}" "${src}")
endforeach()
if(CMAKE_${lang}_COMPILER_ID)
break()
endif()
endforeach()
if(CMAKE_${lang}_COMPILER_ID)
break()
endif()
endforeach()
# If the compiler is still unknown, try to query its vendor.
if(CMAKE_${lang}_COMPILER AND NOT CMAKE_${lang}_COMPILER_ID)
foreach(userflags "${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}" "")
CMAKE_DETERMINE_COMPILER_ID_VENDOR(${lang} "${userflags}")
endforeach()
endif()
if (COMPILER_QNXNTO AND CMAKE_${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_${lang}_COMPILER_ID QCC)
# http://community.qnx.com/sf/discussion/do/listPosts/projects.community/discussion.qnx_momentics_community_support.topc3555?_pagenum=2
# The qcc driver does not itself have a version.
endif()
endif()
# if the format is unknown after all files have been checked, put "Unknown" in the cache
if(NOT CMAKE_EXECUTABLE_FORMAT)
set(CMAKE_EXECUTABLE_FORMAT "Unknown" CACHE INTERNAL "Executable file format")
endif()
if(CMAKE_GENERATOR STREQUAL "Ninja" AND MSVC_${lang}_ARCHITECTURE_ID)
foreach(userflags "${CMAKE_${lang}_COMPILER_ID_FLAGS_LIST}" "")
CMAKE_DETERMINE_MSVC_SHOWINCLUDES_PREFIX(${lang} "${userflags}")
endforeach()
else()
set(CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX "")
endif()
# Display the final identification result.
if(CMAKE_${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}_XCODE_CURRENT_ARCH "${CMAKE_${lang}_XCODE_CURRENT_ARCH}" 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)
set(CMAKE_${lang}_COMPILER_PRODUCED_OUTPUT "${COMPILER_${lang}_PRODUCED_OUTPUT}" PARENT_SCOPE)
set(CMAKE_${lang}_COMPILER_PRODUCED_FILES "${COMPILER_${lang}_PRODUCED_FILES}" PARENT_SCOPE)
endfunction()
include(CMakeCompilerIdDetection)
#-----------------------------------------------------------------------------
# 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 ${src_in} ID_CONTENT_IN)
compiler_id_detection(CMAKE_${lang}_COMPILER_ID_CONTENT ${lang}
ID_STRING
VERSION_STRINGS
PLATFORM_DEFAULT_COMPILER
)
unset(src_in CACHE)
string(CONFIGURE "${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 userflags src)
# Create a clean working directory.
file(REMOVE_RECURSE ${CMAKE_${lang}_COMPILER_ID_DIR})
file(MAKE_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR})
file(MAKE_DIRECTORY ${CMAKE_${lang}_COMPILER_ID_DIR}/tmp)
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: ${userflags}
Id flags: ${testflags} ${CMAKE_${lang}_COMPILER_ID_FLAGS_ALWAYS}
")
# Compile the compiler identification source.
if("${CMAKE_GENERATOR}" MATCHES "Visual Studio ([0-9]+)")
set(vs_version ${CMAKE_MATCH_1})
set(id_platform ${CMAKE_VS_PLATFORM_NAME})
set(id_lang "${lang}")
if(CMAKE_VS_PLATFORM_TOOLSET MATCHES "v[0-9]+_clang_.*")
set(id_cl clang.exe)
else()
set(id_cl cl.exe)
endif()
if(CMAKE_VS_PLATFORM_NAME STREQUAL "Tegra-Android")
set(v NsightTegra)
set(ext vcxproj)
if(lang STREQUAL CXX)
set(id_gcc g++)
set(id_clang clang++)
else()
set(id_gcc gcc)
set(id_clang clang)
endif()
elseif(lang STREQUAL Fortran)
set(v Intel)
set(ext vfproj)
set(id_cl ifort.exe)
elseif(lang STREQUAL CSharp)
set(v 10)
set(ext csproj)
set(id_cl csc.exe)
elseif(NOT "${vs_version}" VERSION_LESS 10)
set(v 10)
set(ext vcxproj)
else()
set(id_version ${vs_version}.00)
set(v 7)
set(ext vcproj)
endif()
if(CMAKE_VS_PLATFORM_TOOLSET)
if(CMAKE_VS_PLATFORM_NAME STREQUAL "Tegra-Android")
set(id_toolset "<NdkToolchainVersion>${CMAKE_VS_PLATFORM_TOOLSET}</NdkToolchainVersion>")
else()
set(id_toolset "<PlatformToolset>${CMAKE_VS_PLATFORM_TOOLSET}</PlatformToolset>")
if(CMAKE_VS_PLATFORM_TOOLSET MATCHES "Intel")
set(id_cl icl.exe)
endif()
endif()
else()
set(id_toolset "")
endif()
if(CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE)
set(id_PreferredToolArchitecture "<PreferredToolArchitecture>${CMAKE_VS_PLATFORM_TOOLSET_HOST_ARCHITECTURE}</PreferredToolArchitecture>")
else()
set(id_PreferredToolArchitecture "")
endif()
if(CMAKE_SYSTEM_NAME STREQUAL "WindowsPhone")
set(id_system "<ApplicationType>Windows Phone</ApplicationType>")
elseif(CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
set(id_system "<ApplicationType>Windows Store</ApplicationType>")
else()
set(id_system "")
endif()
if(id_system AND CMAKE_SYSTEM_VERSION)
set(id_system_version "<ApplicationTypeRevision>${CMAKE_SYSTEM_VERSION}</ApplicationTypeRevision>")
else()
set(id_system_version "")
endif()
if(CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION)
set(id_WindowsTargetPlatformVersion "<WindowsTargetPlatformVersion>${CMAKE_VS_WINDOWS_TARGET_PLATFORM_VERSION}</WindowsTargetPlatformVersion>")
endif()
if(id_platform STREQUAL ARM)
set(id_WindowsSDKDesktopARMSupport "<WindowsSDKDesktopARMSupport>true</WindowsSDKDesktopARMSupport>")
else()
set(id_WindowsSDKDesktopARMSupport "")
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})
set(id_src "${src}")
set(id_compile "ClCompile")
set(id_PostBuildEvent_Command "for %%i in (${id_cl}) do %40echo CMAKE_${lang}_COMPILER=%%~$PATH:i")
set(id_Import_props "")
set(id_Import_targets "")
set(id_ItemDefinitionGroup_entry "")
set(id_Link_AdditionalDependencies "")
if(lang STREQUAL CUDA)
if(NOT CMAKE_VS_PLATFORM_TOOLSET_CUDA)
message(FATAL_ERROR "No CUDA toolset found.")
endif()
set(cuda_tools "CUDA ${CMAKE_VS_PLATFORM_TOOLSET_CUDA}")
set(id_compile "CudaCompile")
set(id_PostBuildEvent_Command [[echo CMAKE_CUDA_COMPILER=$(CudaToolkitBinDir)\nvcc.exe]])
string(CONCAT id_Import_props [[<Import Project="$(VCTargetsPath)\BuildCustomizations\]] "${cuda_tools}" [[.props" />]])
string(CONCAT id_Import_targets [[<Import Project="$(VCTargetsPath)\BuildCustomizations\]] "${cuda_tools}" [[.targets" />]])
if(CMAKE_VS_PLATFORM_NAME STREQUAL x64)
set(id_ItemDefinitionGroup_entry "<CudaCompile><TargetMachinePlatform>64</TargetMachinePlatform></CudaCompile>")
endif()
set(id_Link_AdditionalDependencies "<AdditionalDependencies>cudart.lib</AdditionalDependencies>")
endif()
configure_file(${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")
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})
set(id_src "${src}")
if(CMAKE_XCODE_PLATFORM_TOOLSET)
set(id_toolset "GCC_VERSION = ${CMAKE_XCODE_PLATFORM_TOOLSET};")
else()
set(id_toolset "")
endif()
if("${lang}" STREQUAL "Swift")
if(CMAKE_Swift_LANGUAGE_VERSION)
set(id_lang_version "SWIFT_VERSION = ${CMAKE_Swift_LANGUAGE_VERSION};")
elseif(XCODE_VERSION VERSION_GREATER_EQUAL 8.3)
set(id_lang_version "SWIFT_VERSION = 3.0;")
else()
set(id_lang_version "SWIFT_VERSION = 2.3;")
endif()
else()
set(id_lang_version "")
endif()
if(CMAKE_OSX_DEPLOYMENT_TARGET)
set(id_deployment_target
"MACOSX_DEPLOYMENT_TARGET = \"${CMAKE_OSX_DEPLOYMENT_TARGET}\";")
else()
set(id_deployment_target "")
endif()
set(id_product_type "com.apple.product-type.tool")
if(CMAKE_OSX_SYSROOT)
set(id_sdkroot "SDKROOT = \"${CMAKE_OSX_SYSROOT}\";")
if(CMAKE_OSX_SYSROOT MATCHES "(^|/)[Ii][Pp][Hh][Oo][Nn][Ee]")
set(id_product_type "com.apple.product-type.bundle.unit-test")
endif()
else()
set(id_sdkroot "")
endif()
configure_file(${CMAKE_ROOT}/Modules/CompilerId/Xcode-3.pbxproj.in
${id_dir}/CompilerId${lang}.xcodeproj/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()
if(DEFINED CMAKE_${lang}_COMPILER_ID_TOOL_MATCH_REGEX)
if("${CMAKE_${lang}_COMPILER_ID_OUTPUT}" MATCHES "${CMAKE_${lang}_COMPILER_ID_TOOL_MATCH_REGEX}")
set(_comp "${CMAKE_MATCH_${CMAKE_${lang}_COMPILER_ID_TOOL_MATCH_INDEX}}")
if(EXISTS "${_comp}")
set(CMAKE_${lang}_COMPILER_ID_TOOL "${_comp}" PARENT_SCOPE)
endif()
endif()
endif()
if("${CMAKE_${lang}_COMPILER_ID_OUTPUT}" MATCHES "CURRENT_ARCH=([^%\r\n]+)[\r\n]")
set(CMAKE_${lang}_XCODE_CURRENT_ARCH "${CMAKE_MATCH_1}" PARENT_SCOPE)
endif()
else()
execute_process(
COMMAND "${CMAKE_${lang}_COMPILER}"
${CMAKE_${lang}_COMPILER_ID_ARG1}
${userflags}
${testflags}
${CMAKE_${lang}_COMPILER_ID_FLAGS_ALWAYS}
"${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_${lang}_COMPILER_ID_RESULT
)
endif()
# Check the result of compilation.
if(CMAKE_${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)
set(COMPILER_${lang}_PRODUCED_OUTPUT)
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.
string(REGEX REPLACE "([][])" "[\\1]" _glob_id_dir "${CMAKE_${lang}_COMPILER_ID_DIR}")
file(GLOB files
RELATIVE ${CMAKE_${lang}_COMPILER_ID_DIR}
# normal case
${_glob_id_dir}/*
# com.apple.package-type.bundle.unit-test
${_glob_id_dir}/*.xctest/*
)
list(REMOVE_ITEM files "${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()
set(COMPILER_${lang}_PRODUCED_OUTPUT "${CMAKE_${lang}_COMPILER_ID_OUTPUT}")
endif()
# Return the files produced by the compilation.
set(COMPILER_${lang}_PRODUCED_FILES "${COMPILER_${lang}_PRODUCED_FILES}" PARENT_SCOPE)
set(COMPILER_${lang}_PRODUCED_OUTPUT "${COMPILER_${lang}_PRODUCED_OUTPUT}" PARENT_SCOPE)
endfunction()
#-----------------------------------------------------------------------------
# Function to extract the compiler id from compiler output.
function(CMAKE_DETERMINE_COMPILER_ID_MATCH_VENDOR lang output)
foreach(vendor ${CMAKE_${lang}_COMPILER_ID_MATCH_VENDORS})
if(output MATCHES "${CMAKE_${lang}_COMPILER_ID_MATCH_VENDOR_REGEX_${vendor}}")
set(CMAKE_${lang}_COMPILER_ID "${vendor}")
endif()
endforeach()
set(CMAKE_${lang}_COMPILER_ID "${CMAKE_${lang}_COMPILER_ID}" 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(COMPILER_VERSION_MAJOR 0)
set(COMPILER_VERSION_MINOR 0)
set(COMPILER_VERSION_PATCH 0)
set(COMPILER_VERSION_TWEAK 0)
set(HAVE_COMPILER_VERSION_MAJOR 0)
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)
set(DIGIT_VALUE_4 1000)
set(DIGIT_VALUE_5 10000)
set(DIGIT_VALUE_6 100000)
set(DIGIT_VALUE_7 1000000)
set(DIGIT_VALUE_8 10000000)
set(PLATFORM_ID)
set(ARCHITECTURE_ID)
set(SIMULATE_ID)
set(SIMULATE_VERSION)
file(STRINGS ${file}
CMAKE_${lang}_COMPILER_ID_STRINGS LIMIT_COUNT 38
${CMAKE_${lang}_COMPILER_ID_STRINGS_PARAMETERS}
REGEX "INFO:[A-Za-z0-9_]+\\[[^]]*\\]")
set(COMPILER_ID_TWICE)
# In C# binaries, some strings are found more than once.
list(REMOVE_DUPLICATES CMAKE_${lang}_COMPILER_ID_STRINGS)
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 "${COMPILER_VERSION}")
endif()
foreach(comp MAJOR MINOR PATCH TWEAK)
foreach(digit 1 2 3 4 5 6 7 8 9)
if("${info}" MATCHES "INFO:compiler_version_${comp}_digit_${digit}\\[([0-9])\\]")
set(value ${CMAKE_MATCH_1})
math(EXPR COMPILER_VERSION_${comp} "${COMPILER_VERSION_${comp}} + ${value} * ${DIGIT_VALUE_${digit}}")
set(HAVE_COMPILER_VERSION_${comp} 1)
endif()
endforeach()
endforeach()
if("${info}" MATCHES "INFO:compiler_wrapper\\[([^]\"]*)\\]")
set(COMPILER_WRAPPER "${CMAKE_MATCH_1}")
endif()
if("${info}" MATCHES "INFO:simulate\\[([^]\"]*)\\]")
set(SIMULATE_ID "${CMAKE_MATCH_1}")
endif()
if("${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("${info}" MATCHES "INFO:qnxnto\\[\\]")
set(COMPILER_QNXNTO 1)
endif()
if("${info}" MATCHES "INFO:dialect_default\\[([^]\"]*)\\]")
set(CMAKE_${lang}_STANDARD_COMPUTED_DEFAULT "${CMAKE_MATCH_1}")
endif()
endforeach()
# Construct compiler version from components if needed.
if(NOT DEFINED COMPILER_VERSION AND HAVE_COMPILER_VERSION_MAJOR)
set(COMPILER_VERSION "${COMPILER_VERSION_MAJOR}")
if(HAVE_COMPILER_VERSION_MINOR)
string(APPEND COMPILER_VERSION ".${COMPILER_VERSION_MINOR}")
if(HAVE_COMPILER_VERSION_PATCH)
string(APPEND COMPILER_VERSION ".${COMPILER_VERSION_PATCH}")
if(HAVE_COMPILER_VERSION_TWEAK)
string(APPEND COMPILER_VERSION ".${COMPILER_VERSION_TWEAK}")
endif()
endif()
endif()
endif()
# 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 ${peoffset} HEX)
if(peheader STREQUAL "50450000a201")
set(ARCHITECTURE_ID "SH3")
elseif(peheader STREQUAL "50450000a301")
set(ARCHITECTURE_ID "SH3DSP")
elseif(peheader STREQUAL "50450000a601")
set(ARCHITECTURE_ID "SH4")
elseif(peheader STREQUAL "50450000a801")
set(ARCHITECTURE_ID "SH5")
endif()
endif()
# Check if a valid compiler and platform were found.
if(COMPILER_ID AND NOT COMPILER_ID_TWICE)
set(CMAKE_${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}_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)
set(COMPILER_QNXNTO "${COMPILER_QNXNTO}" PARENT_SCOPE)
set(CMAKE_${lang}_STANDARD_COMPUTED_DEFAULT "${CMAKE_${lang}_STANDARD_COMPUTED_DEFAULT}" 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_${vendor} "Some Vendor Output")
# We try running the compiler with the flag for each vendor and
# matching its regular expression in the output.
function(CMAKE_DETERMINE_COMPILER_ID_VENDOR lang userflags)
if(NOT CMAKE_${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}
${userflags}
${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()
function(CMAKE_DETERMINE_MSVC_SHOWINCLUDES_PREFIX lang userflags)
# Run this MSVC-compatible compiler to detect what the /showIncludes
# option displays. We can use a C source even with the C++ compiler
# because MSVC-compatible compilers handle both and show the same output.
set(showdir ${CMAKE_BINARY_DIR}/CMakeFiles/ShowIncludes)
file(WRITE ${showdir}/foo.h "\n")
file(WRITE ${showdir}/main.c "#include \"foo.h\" \nint main(){}\n")
execute_process(
COMMAND "${CMAKE_${lang}_COMPILER}"
${CMAKE_${lang}_COMPILER_ID_ARG1}
${userflags}
/nologo /showIncludes /c main.c
WORKING_DIRECTORY ${showdir}
OUTPUT_VARIABLE out
ERROR_VARIABLE err
RESULT_VARIABLE res
ENCODING AUTO # cl prints in current code page
)
if(res EQUAL 0 AND "${out}" MATCHES "(^|\n)([^:\n]*:[^:\n]*:[ \t]*)")
set(CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX "${CMAKE_MATCH_2}" PARENT_SCOPE)
else()
set(CMAKE_${lang}_CL_SHOWINCLUDES_PREFIX "" PARENT_SCOPE)
endif()
endfunction()
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