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
75 lines
3.3 KiB
CMake
75 lines
3.3 KiB
CMake
# - Check if a C function can be linked
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# CHECK_FUNCTION_EXISTS(<function> <variable>)
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#
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# Check that the <function> is provided by libraries on the system and
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# store the result in a <variable>. This does not verify that any
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# system header file declares the function, only that it can be found
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# at link time (considure using CheckSymbolExists).
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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 2002-2011 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_FUNCTION_EXISTS FUNCTION VARIABLE)
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if("${VARIABLE}" MATCHES "^${VARIABLE}$")
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set(MACRO_CHECK_FUNCTION_DEFINITIONS
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"-DCHECK_FUNCTION_EXISTS=${FUNCTION} ${CMAKE_REQUIRED_FLAGS}")
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message(STATUS "Looking for ${FUNCTION}")
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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_FUNCTION_EXISTS_ADD_LIBRARIES
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"-DLINK_LIBRARIES:STRING=${_ADJUSTED_CMAKE_REQUIRED_LIBRARIES}")
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else()
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set(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES)
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endif()
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if(CMAKE_REQUIRED_INCLUDES)
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set(CHECK_FUNCTION_EXISTS_ADD_INCLUDES
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"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
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else()
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set(CHECK_FUNCTION_EXISTS_ADD_INCLUDES)
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endif()
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try_compile(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_ROOT}/Modules/CheckFunctionExists.c
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
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"${CHECK_FUNCTION_EXISTS_ADD_LIBRARIES}"
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"${CHECK_FUNCTION_EXISTS_ADD_INCLUDES}"
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OUTPUT_VARIABLE OUTPUT)
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if(${VARIABLE})
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set(${VARIABLE} 1 CACHE INTERNAL "Have function ${FUNCTION}")
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message(STATUS "Looking for ${FUNCTION} - found")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the function ${FUNCTION} exists passed with the following output:\n"
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"${OUTPUT}\n\n")
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else()
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message(STATUS "Looking for ${FUNCTION} - not found")
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set(${VARIABLE} "" CACHE INTERNAL "Have function ${FUNCTION}")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the function ${FUNCTION} exists failed with the following output:\n"
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"${OUTPUT}\n\n")
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endif()
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endif()
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endmacro()
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