71 lines
3.2 KiB
CMake
71 lines
3.2 KiB
CMake
# - 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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# ARGCOUNT - number of arguments for stdcall functions
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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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MACRO(CHECK_SHARED_LIBRARY_EXISTS LIBRARY FUNCTION ARGCOUNT LOCATION VARIABLE)
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IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
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SET(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION
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"-DCHECK_SHARED_FUNCTION_EXISTS=${FUNCTION} ${CMAKE_REQUIRED_FLAGS}")
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IF(WIN32)
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IF(${ARGCOUNT} GREATER 0)
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SET(ARGSTACK "void*")
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SET(CALLSTACK "NULL")
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SET(CURARG 1)
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WHILE(${ARGCOUNT} GREATER ${CURARG})
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SET(ARGSTACK "${ARGSTACK},void*")
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SET(CALLSTACK "${CALLSTACK},NULL")
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MATH(EXPR CURARG "${CURARG} + 1")
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ENDWHILE(${ARGCOUNT} GREATER ${CURARG})
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SET(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION
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"-D_WIN32 -DARGSTACK=\"${ARGSTACK}\" -DCALLSTACK=\"${CALLSTACK}\" ${MACRO_CHECK_LIBRARY_EXISTS_DEFINITION}")
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ELSE(${ARGCOUNT} GREATER 0)
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SET(MACRO_CHECK_LIBRARY_EXISTS_DEFINITION
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"-D_WIN32 ${MACRO_CHECK_LIBRARY_EXISTS_DEFINITION}")
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ENDIF(${ARGCOUNT} GREATER 0)
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ENDIF(WIN32)
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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_SOURCE_DIR}/cmake/CheckSharedFunctionExists.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_SHARED_LIBRARY_EXISTS)
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