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#
# Check if the function exists.
#
# CHECK_LIBRARY_EXISTS - macro which checks if the function exists
# FUNCTION - the name of the function
# VARIABLE - variable to store the result
#
MACRO(CHECK_LIBRARY_EXISTS LIBRARY FUNCTION LOCATION VARIABLE)
SET(CHECK_LIBRARY_EXISTS_LIBRARY ${LIBRARY})
SET(CHECK_LIBRARY_EXISTS_FUNCTION ${FUNCTION})
SET(CHECK_LIBRARY_EXISTS_LOCATION ${LOCATION})
SET(CHECK_LIBRARY_EXISTS_VARIABLE ${VARIABLE})
SET(CHECK_LIBRARY_EXISTS_SOURCE ${CMAKE_ROOT}/Modules/CheckFunctionExists.c)
CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CheckLibraryExists.lists.in
${PROJECT_BINARY_DIR}/CMakeTmp/CheckLibraryExists/CMakeLists.txt
IMMEDIATE)
TRY_COMPILE(${VARIABLE}
${PROJECT_BINARY_DIR}/CMakeTmp/CheckLibraryExists
${PROJECT_BINARY_DIR}/CMakeTmp/CheckLibraryExists
CHECK_LIBRARY_EXISTS OUTPUT_VARIABLE OUTPUT)
IF(NOT ${VARIABLE})
WRITE_FILE(${PROJECT_BINARY_DIR}/CMakeError.log
"Determining if the function ${FUNCTION} exists failed with the following output:\n"
"${OUTPUT}\n")
ENDIF(NOT ${VARIABLE})
ENDMACRO(CHECK_LIBRARY_EXISTS)
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