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66 lines
2.9 KiB
66 lines
2.9 KiB
# - Check if the function exists.
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# CHECK_LIBRARY_EXISTS (LIBRARY FUNCTION LOCATION VARIABLE)
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#
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# LIBRARY - the name of the library you are looking for
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# FUNCTION - the name of the function
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# LOCATION - location where the library should be found
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# VARIABLE - variable to store the result
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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_LIBRARIES = list of libraries to link
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#=============================================================================
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# Copyright 2002-2009 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 distributed this file outside of CMake, substitute the full
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# License text for the above reference.)
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MACRO(CHECK_LIBRARY_EXISTS LIBRARY FUNCTION LOCATION VARIABLE)
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IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
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SET(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION
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"-DCHECK_FUNCTION_EXISTS=${FUNCTION} ${CMAKE_REQUIRED_FLAGS}")
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MESSAGE(STATUS "Looking for ${FUNCTION} in ${LIBRARY}")
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SET(CHECK_LIBRARY_EXISTS_LIBRARIES ${LIBRARY})
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IF(CMAKE_REQUIRED_LIBRARIES)
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SET(CHECK_LIBRARY_EXISTS_LIBRARIES
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${CHECK_LIBRARY_EXISTS_LIBRARIES} ${CMAKE_REQUIRED_LIBRARIES})
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ENDIF(CMAKE_REQUIRED_LIBRARIES)
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TRY_COMPILE(${VARIABLE}
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${CMAKE_BINARY_DIR}
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${CMAKE_ROOT}/Modules/CheckFunctionExists.c
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COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
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CMAKE_FLAGS
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-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_LIBRARY_EXISTS_DEFINITION}
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-DLINK_DIRECTORIES:STRING=${LOCATION}
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"-DLINK_LIBRARIES:STRING=${CHECK_LIBRARY_EXISTS_LIBRARIES}"
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OUTPUT_VARIABLE OUTPUT)
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IF(${VARIABLE})
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MESSAGE(STATUS "Looking for ${FUNCTION} in ${LIBRARY} - found")
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SET(${VARIABLE} 1 CACHE INTERNAL "Have library ${LIBRARY}")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the function ${FUNCTION} exists in the ${LIBRARY} "
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"passed with the following output:\n"
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"${OUTPUT}\n\n")
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ELSE(${VARIABLE})
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MESSAGE(STATUS "Looking for ${FUNCTION} in ${LIBRARY} - not found")
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SET(${VARIABLE} "" CACHE INTERNAL "Have library ${LIBRARY}")
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FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the function ${FUNCTION} exists in the ${LIBRARY} "
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"failed with the following output:\n"
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"${OUTPUT}\n\n")
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ENDIF(${VARIABLE})
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ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
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ENDMACRO(CHECK_LIBRARY_EXISTS)
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