9db3116226
Ancient versions of CMake required else(), endif(), and similar block
termination commands to have arguments matching the command starting the
block. This is no longer the preferred style.
Run the following shell code:
for c in else endif endforeach endfunction endmacro endwhile; do
echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/'
done >convert.sed &&
git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' |
egrep -z -v '^(Utilities/cm|Source/kwsys/)' |
egrep -z -v 'Tests/CMakeTests/While-Endwhile-' |
xargs -0 sed -i -f convert.sed &&
rm convert.sed
102 lines
4.5 KiB
CMake
102 lines
4.5 KiB
CMake
# - Check if a symbol exists as a function, variable, or macro
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# CHECK_SYMBOL_EXISTS(<symbol> <files> <variable>)
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#
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# Check that the <symbol> is available after including given header
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# <files> and store the result in a <variable>. Specify the list
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# of files in one argument as a semicolon-separated list.
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#
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# If the header files define the symbol as a macro it is considered
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# available and assumed to work. If the header files declare the
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# symbol as a function or variable then the symbol must also be
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# available for linking. If the symbol is a type or enum value
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# it will not be recognized (consider using CheckTypeSize or
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# CheckCSourceCompiles).
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# If the check needs to be done in C++, consider using CHECK_CXX_SYMBOL_EXISTS(),
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# which does the same as CHECK_SYMBOL_EXISTS(), but in C++.
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#
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# The following variables may be set before calling this macro to
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# modify the way the check is run:
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#
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# CMAKE_REQUIRED_FLAGS = string of compile command line flags
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# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
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# CMAKE_REQUIRED_INCLUDES = list of include directories
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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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#=============================================================================
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# Copyright 2003-2011 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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include("${CMAKE_CURRENT_LIST_DIR}/CMakeExpandImportedTargets.cmake")
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macro(CHECK_SYMBOL_EXISTS SYMBOL FILES VARIABLE)
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_CHECK_SYMBOL_EXISTS("${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.c" "${SYMBOL}" "${FILES}" "${VARIABLE}" )
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endmacro()
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macro(_CHECK_SYMBOL_EXISTS SOURCEFILE SYMBOL FILES VARIABLE)
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if("${VARIABLE}" MATCHES "^${VARIABLE}$")
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set(CMAKE_CONFIGURABLE_FILE_CONTENT "/* */\n")
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set(MACRO_CHECK_SYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
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if(CMAKE_REQUIRED_LIBRARIES)
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# this one translates potentially used imported library targets to their files on disk
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CMAKE_EXPAND_IMPORTED_TARGETS(_ADJUSTED_CMAKE_REQUIRED_LIBRARIES LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} CONFIGURATION "${CMAKE_TRY_COMPILE_CONFIGURATION}")
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set(CHECK_SYMBOL_EXISTS_LIBS
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"-DLINK_LIBRARIES:STRING=${_ADJUSTED_CMAKE_REQUIRED_LIBRARIES}")
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else()
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set(CHECK_SYMBOL_EXISTS_LIBS)
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endif()
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if(CMAKE_REQUIRED_INCLUDES)
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set(CMAKE_SYMBOL_EXISTS_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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else()
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set(CMAKE_SYMBOL_EXISTS_INCLUDES)
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endif()
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foreach(FILE ${FILES})
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set(CMAKE_CONFIGURABLE_FILE_CONTENT
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}#include <${FILE}>\n")
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endforeach()
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set(CMAKE_CONFIGURABLE_FILE_CONTENT
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\nint main(int argc, char** argv)\n{\n (void)argv;\n#ifndef ${SYMBOL}\n return ((int*)(&${SYMBOL}))[argc];\n#else\n (void)argc;\n return 0;\n#endif\n}\n")
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configure_file("${CMAKE_ROOT}/Modules/CMakeConfigurableFile.in"
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"${SOURCEFILE}" @ONLY IMMEDIATE)
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message(STATUS "Looking for ${SYMBOL}")
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try_compile(${VARIABLE}
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${CMAKE_BINARY_DIR}
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"${SOURCEFILE}"
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS
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-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_SYMBOL_EXISTS_FLAGS}
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"${CHECK_SYMBOL_EXISTS_LIBS}"
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"${CMAKE_SYMBOL_EXISTS_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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if(${VARIABLE})
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message(STATUS "Looking for ${SYMBOL} - found")
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set(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the ${SYMBOL} "
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"exist passed with the following output:\n"
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"${OUTPUT}\nFile ${SOURCEFILE}:\n"
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
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else()
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message(STATUS "Looking for ${SYMBOL} - not found.")
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set(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the ${SYMBOL} "
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"exist failed with the following output:\n"
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"${OUTPUT}\nFile ${SOURCEFILE}:\n"
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"${CMAKE_CONFIGURABLE_FILE_CONTENT}\n")
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endif()
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endif()
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endmacro()
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