blob: 0bd65f7a37e7b76ec6acddcc3de372a656ddb870 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
#
# 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)
|
