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comparison cmake/CheckCCompilerFlag.cmake @ 0:f9476ff7637e

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initial forking of open-al to create multiple listeners
author Robert McIntyre <rlm@mit.edu>
date Tue, 25 Oct 2011 13:02:31 -0700
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-1:000000000000 0:f9476ff7637e
1 # - Check if the C source code provided in the SOURCE argument compiles.
2 # CHECK_C_SOURCE_COMPILES(SOURCE VAR)
3 #
4 # FLAG - compiler flag to check
5 # VAR - variable to store whether the source code compiled
6 #
7 # The following variables may be set before calling this macro to
8 # modify the way the check is run:
9 #
10 # CMAKE_REQUIRED_FLAGS = string of compile command line flags
11 # CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
12 # CMAKE_REQUIRED_INCLUDES = list of include directories
13 # CMAKE_REQUIRED_LIBRARIES = list of libraries to link
14
15 MACRO(CHECK_C_COMPILER_FLAG FLAG VAR)
16 IF("${VAR}" MATCHES "^${VAR}$")
17 SET(MACRO_CHECK_FUNCTION_DEFINITIONS
18 "${FLAG} ${CMAKE_REQUIRED_FLAGS}")
19 IF(CMAKE_REQUIRED_LIBRARIES)
20 SET(CHECK_C_COMPILER_FLAG_ADD_LIBRARIES
21 "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
22 ELSE(CMAKE_REQUIRED_LIBRARIES)
23 SET(CHECK_C_COMPILER_FLAG_ADD_LIBRARIES)
24 ENDIF(CMAKE_REQUIRED_LIBRARIES)
25 IF(CMAKE_REQUIRED_INCLUDES)
26 SET(CHECK_C_COMPILER_FLAG_ADD_INCLUDES
27 "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
28 ELSE(CMAKE_REQUIRED_INCLUDES)
29 SET(CHECK_C_COMPILER_FLAG_ADD_INCLUDES)
30 ENDIF(CMAKE_REQUIRED_INCLUDES)
31 FILE(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
32 "int main() {return 0;}\n")
33
34 MESSAGE(STATUS "Checking if C compiler supports ${FLAG}")
35 TRY_COMPILE(${VAR}
36 ${CMAKE_BINARY_DIR}
37 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
38 COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
39 CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
40 "${CHECK_C_COMPILER_FLAG_ADD_LIBRARIES}"
41 "${CHECK_C_COMPILER_FLAG_ADD_INCLUDES}"
42 OUTPUT_VARIABLE OUTPUT)
43 IF(${VAR})
44 SET(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
45 MESSAGE(STATUS "Checking if C compiler supports ${FLAG} - Success")
46 FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
47 "Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
48 "${OUTPUT}\n"
49 "Source file was:\n${SOURCE}\n")
50 ELSE(${VAR})
51 MESSAGE(STATUS "Checking if C compiler supports ${FLAG} - Failed")
52 SET(${VAR} "" CACHE INTERNAL "Test ${VAR}")
53 FILE(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
54 "Performing C SOURCE FILE Test ${VAR} failed with the following output:\n"
55 "${OUTPUT}\n"
56 "Source file was:\n${SOURCE}\n")
57 ENDIF(${VAR})
58 ENDIF("${VAR}" MATCHES "^${VAR}$")
59 ENDMACRO(CHECK_C_COMPILER_FLAG)