55 lines
2.4 KiB
CMake
55 lines
2.4 KiB
CMake
# - Check if the function exists.
|
|
# CHECK_FUNCTION_EXISTS(FUNCTION VARIABLE)
|
|
# - macro which checks if the function exists
|
|
# FUNCTION - the name of the function
|
|
# VARIABLE - variable to store the result
|
|
#
|
|
# The following variables may be set before calling this macro to
|
|
# modify the way the check is run:
|
|
#
|
|
# CMAKE_REQUIRED_FLAGS = string of compile command line flags
|
|
# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
|
|
# CMAKE_REQUIRED_INCLUDES = list of include directories
|
|
# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
|
|
|
|
MACRO(CHECK_FUNCTION_EXISTS FUNCTION VARIABLE)
|
|
IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
SET(MACRO_CHECK_FUNCTION_DEFINITIONS
|
|
"-DCHECK_FUNCTION_EXISTS=${FUNCTION} ${CMAKE_REQUIRED_FLAGS}")
|
|
MESSAGE(STATUS "Looking for ${FUNCTION}")
|
|
IF(CMAKE_REQUIRED_LIBRARIES)
|
|
SET(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES
|
|
"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
|
|
ELSE(CMAKE_REQUIRED_LIBRARIES)
|
|
SET(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES)
|
|
ENDIF(CMAKE_REQUIRED_LIBRARIES)
|
|
IF(CMAKE_REQUIRED_INCLUDES)
|
|
SET(CHECK_FUNCTION_EXISTS_ADD_INCLUDES
|
|
"-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
|
|
ELSE(CMAKE_REQUIRED_INCLUDES)
|
|
SET(CHECK_FUNCTION_EXISTS_ADD_INCLUDES)
|
|
ENDIF(CMAKE_REQUIRED_INCLUDES)
|
|
TRY_COMPILE(${VARIABLE}
|
|
${CMAKE_BINARY_DIR}
|
|
${CMAKE_ROOT}/Modules/CheckFunctionExists.c
|
|
COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
|
|
CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
|
|
"${CHECK_FUNCTION_EXISTS_ADD_LIBRARIES}"
|
|
"${CHECK_FUNCTION_EXISTS_ADD_INCLUDES}"
|
|
OUTPUT_VARIABLE OUTPUT)
|
|
IF(${VARIABLE})
|
|
SET(${VARIABLE} 1 CACHE INTERNAL "Have function ${FUNCTION}")
|
|
MESSAGE(STATUS "Looking for ${FUNCTION} - found")
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
|
|
"Determining if the function ${FUNCTION} exists passed with the following output:\n"
|
|
"${OUTPUT}\n\n")
|
|
ELSE(${VARIABLE})
|
|
MESSAGE(STATUS "Looking for ${FUNCTION} - not found")
|
|
SET(${VARIABLE} "" CACHE INTERNAL "Have function ${FUNCTION}")
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
|
|
"Determining if the function ${FUNCTION} exists failed with the following output:\n"
|
|
"${OUTPUT}\n\n")
|
|
ENDIF(${VARIABLE})
|
|
ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
ENDMACRO(CHECK_FUNCTION_EXISTS)
|