CMake/Modules/CMakeDetermineCompilerABI.c...

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#=============================================================================
# Copyright 2008-2009 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 ABI.
# This is used internally by CMake and should not be included by user
# code.
include(${CMAKE_ROOT}/Modules/CMakeParseImplicitLinkInfo.cmake)
function(CMAKE_DETERMINE_COMPILER_ABI lang src)
if(NOT DEFINED CMAKE_${lang}_ABI_COMPILED)
message(STATUS "Detecting ${lang} compiler ABI info")
# Compile the ABI identification source.
Make platform information files specific to the CMake version At the top of a build tree we configure inside the CMakeFiles directory files such as "CMakeSystem.cmake" and "CMake<lang>Compiler.cmake" to save information detected about the system and compilers in use. The method of detection and the exact results store varies across CMake versions as things improve. This leads to problems when loading files configured by a different version of CMake. Previously we ignored such existing files only if the major.minor part of the CMake version component changed, and depended on the CMakeCache.txt to tell us the last version of CMake that wrote the files. This led to problems if the user deletes the CMakeCache.txt or we add required information to the files in a patch-level release of CMake (still a "feature point" release by modern CMake versioning convention). Ensure that we always have version-consistent platform information files by storing them in a subdirectory named with the CMake version. Every version of CMake will do its own system and compiler identification checks even when a build tree has already been configured by another version of CMake. Stored results will not clobber those from other versions of CMake which may be run again on the same tree in the future. Loaded results will match what the system and language modules expect. Rename the undocumented variable CMAKE_PLATFORM_ROOT_BIN to CMAKE_PLATFORM_INFO_DIR to clarify its purpose. The new variable points at the version-specific directory while the old variable did not.
2012-08-24 16:48:59 +04:00
set(BIN "${CMAKE_PLATFORM_INFO_DIR}/CMakeDetermineCompilerABI_${lang}.bin")
set(CMAKE_FLAGS )
if(DEFINED CMAKE_${lang}_VERBOSE_FLAG)
set(CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${CMAKE_${lang}_VERBOSE_FLAG}")
endif()
if(NOT "x${CMAKE_${lang}_COMPILER_ID}" STREQUAL "xMSVC")
# Avoid adding our own platform standard libraries for compilers
# from which we might detect implicit link libraries.
list(APPEND CMAKE_FLAGS "-DCMAKE_${lang}_STANDARD_LIBRARIES=")
endif()
try_compile(CMAKE_${lang}_ABI_COMPILED
${CMAKE_BINARY_DIR} ${src}
CMAKE_FLAGS ${CMAKE_FLAGS}
# Ignore unused flags when we are just determining the ABI.
"--no-warn-unused-cli"
OUTPUT_VARIABLE OUTPUT
COPY_FILE "${BIN}"
COPY_FILE_ERROR _copy_error
)
# Move result from cache to normal variable.
set(CMAKE_${lang}_ABI_COMPILED ${CMAKE_${lang}_ABI_COMPILED})
unset(CMAKE_${lang}_ABI_COMPILED CACHE)
set(CMAKE_${lang}_ABI_COMPILED ${CMAKE_${lang}_ABI_COMPILED} PARENT_SCOPE)
# Load the resulting information strings.
if(CMAKE_${lang}_ABI_COMPILED AND NOT _copy_error)
message(STATUS "Detecting ${lang} compiler ABI info - done")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Detecting ${lang} compiler ABI info compiled with the following output:\n${OUTPUT}\n\n")
file(STRINGS "${BIN}" ABI_STRINGS LIMIT_COUNT 2 REGEX "INFO:[A-Za-z0-9_]+\\[[^]]*\\]")
foreach(info ${ABI_STRINGS})
if("${info}" MATCHES "INFO:sizeof_dptr\\[0*([^]]*)\\]")
set(ABI_SIZEOF_DPTR "${CMAKE_MATCH_1}")
endif()
if("${info}" MATCHES "INFO:abi\\[([^]]*)\\]")
set(ABI_NAME "${CMAKE_MATCH_1}")
endif()
endforeach()
if(ABI_SIZEOF_DPTR)
set(CMAKE_${lang}_SIZEOF_DATA_PTR "${ABI_SIZEOF_DPTR}" PARENT_SCOPE)
elseif(CMAKE_${lang}_SIZEOF_DATA_PTR_DEFAULT)
set(CMAKE_${lang}_SIZEOF_DATA_PTR "${CMAKE_${lang}_SIZEOF_DATA_PTR_DEFAULT}" PARENT_SCOPE)
endif()
if(ABI_NAME)
set(CMAKE_${lang}_COMPILER_ABI "${ABI_NAME}" PARENT_SCOPE)
endif()
# Parse implicit linker information for this language, if available.
set(implicit_dirs "")
set(implicit_libs "")
set(implicit_fwks "")
if(CMAKE_${lang}_VERBOSE_FLAG)
CMAKE_PARSE_IMPLICIT_LINK_INFO("${OUTPUT}" implicit_libs implicit_dirs implicit_fwks log
"${CMAKE_${lang}_IMPLICIT_OBJECT_REGEX}")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"Parsed ${lang} implicit link information from above output:\n${log}\n\n")
endif()
# for VS IDE Intel Fortran we have to figure out the
# implicit link path for the fortran run time using
# a try-compile
if("${lang}" MATCHES "Fortran"
AND "${CMAKE_GENERATOR}" MATCHES "Visual Studio")
set(_desc "Determine Intel Fortran Compiler Implicit Link Path")
message(STATUS "${_desc}")
# Build a sample project which reports symbols.
try_compile(IFORT_LIB_PATH_COMPILED
${CMAKE_BINARY_DIR}/CMakeFiles/IntelVSImplicitPath
${CMAKE_ROOT}/Modules/IntelVSImplicitPath
IntelFortranImplicit
CMAKE_FLAGS
"-DCMAKE_Fortran_FLAGS:STRING=${CMAKE_Fortran_FLAGS}"
OUTPUT_VARIABLE _output)
file(WRITE
"${CMAKE_BINARY_DIR}/CMakeFiles/IntelVSImplicitPath/output.txt"
"${_output}")
include(${CMAKE_BINARY_DIR}/CMakeFiles/IntelVSImplicitPath/output.cmake OPTIONAL)
set(_desc "Determine Intel Fortran Compiler Implicit Link Path -- done")
message(STATUS "${_desc}")
endif()
# Implicit link libraries cannot be used explicitly for multiple
# OS X architectures, so we skip it.
if(DEFINED CMAKE_OSX_ARCHITECTURES)
if("${CMAKE_OSX_ARCHITECTURES}" MATCHES ";")
set(implicit_libs "")
endif()
endif()
set(CMAKE_${lang}_IMPLICIT_LINK_LIBRARIES "${implicit_libs}" PARENT_SCOPE)
set(CMAKE_${lang}_IMPLICIT_LINK_DIRECTORIES "${implicit_dirs}" PARENT_SCOPE)
set(CMAKE_${lang}_IMPLICIT_LINK_FRAMEWORK_DIRECTORIES "${implicit_fwks}" PARENT_SCOPE)
# Detect library architecture directory name.
if(CMAKE_LIBRARY_ARCHITECTURE_REGEX)
foreach(dir ${implicit_dirs})
if("${dir}" MATCHES "/lib/${CMAKE_LIBRARY_ARCHITECTURE_REGEX}$")
get_filename_component(arch "${dir}" NAME)
set(CMAKE_${lang}_LIBRARY_ARCHITECTURE "${arch}" PARENT_SCOPE)
break()
endif()
endforeach()
endif()
else()
message(STATUS "Detecting ${lang} compiler ABI info - failed")
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Detecting ${lang} compiler ABI info failed to compile with the following output:\n${OUTPUT}\n${_copy_error}\n\n")
endif()
endif()
endfunction()