mirror of
https://github.com/reactos/CMake.git
synced 2024-11-26 13:00:25 +00:00
55 lines
2.3 KiB
CMake
55 lines
2.3 KiB
CMake
#
|
|
# Check if the symbol exists in include files
|
|
#
|
|
# CHECK_SYMBOL_EXISTS - macro which checks the symbol exists in include files.
|
|
# SYMBOL - symbol
|
|
# FILES - include files to check
|
|
# VARIABLE - variable to return result
|
|
#
|
|
|
|
MACRO(CHECK_SYMBOL_EXISTS SYMBOL FILES VARIABLE)
|
|
IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
SET(CHECK_SYMBOL_EXISTS_CONTENT "/* */\n")
|
|
SET(MACRO_CHECK_SYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
|
|
IF(CMAKE_REQUIRED_LIBRARIES)
|
|
SET(CHECK_SYMBOL_EXISTS_LIBS
|
|
"-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
|
|
ENDIF(CMAKE_REQUIRED_LIBRARIES)
|
|
FOREACH(FILE ${FILES})
|
|
SET(CHECK_SYMBOL_EXISTS_CONTENT
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}#include <${FILE}>\n")
|
|
ENDFOREACH(FILE)
|
|
SET(CHECK_SYMBOL_EXISTS_CONTENT
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}\nvoid cmakeRequireSymbol(int dummy,...){(void)dummy;}\nint main()\n{\n#ifndef ${SYMBOL}\n cmakeRequireSymbol(0,&${SYMBOL});\n#endif\n return 0;\n}\n")
|
|
|
|
FILE(WRITE ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}")
|
|
|
|
MESSAGE(STATUS "Looking for ${SYMBOL}")
|
|
TRY_COMPILE(${VARIABLE}
|
|
${CMAKE_BINARY_DIR}
|
|
${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c
|
|
CMAKE_FLAGS
|
|
-DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_SYMBOL_EXISTS_FLAGS}
|
|
"${CHECK_SYMBOL_EXISTS_LIBS}"
|
|
OUTPUT_VARIABLE OUTPUT)
|
|
IF(${VARIABLE})
|
|
MESSAGE(STATUS "Looking for ${SYMBOL} - found")
|
|
SET(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL}")
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
|
|
"Determining if the ${SYMBOL} "
|
|
"exist passed with the following output:\n"
|
|
"${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}\n")
|
|
ELSE(${VARIABLE})
|
|
MESSAGE(STATUS "Looking for ${SYMBOL} - not found.")
|
|
SET(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}")
|
|
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
|
|
"Determining if the ${SYMBOL} "
|
|
"exist failed with the following output:\n"
|
|
"${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
|
|
"${CHECK_SYMBOL_EXISTS_CONTENT}\n")
|
|
ENDIF(${VARIABLE})
|
|
ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
|
|
ENDMACRO(CHECK_SYMBOL_EXISTS)
|