1 # - Check if the source code provided in the SOURCE argument compiles.
2 # CURL_CHECK_C_SOURCE_COMPILES(SOURCE VAR)
3 # - macro which checks if the source code compiles
4 # SOURCE - source code to try to compile
5 # VAR - variable to store whether the source code compiled
7 # The following variables may be set before calling this macro to
8 # modify the way the check is run:
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
15 macro(CURL_CHECK_C_SOURCE_COMPILES SOURCE VAR)
16 if("${VAR}" MATCHES "^${VAR}$" OR "${VAR}" MATCHES "UNKNOWN")
18 # If the number of arguments is greater than 2 (SOURCE VAR)
20 # then add the third argument as a message
21 set(message "${ARGV2} (${VAR})")
22 endif(${ARGC} GREATER 2)
23 set(MACRO_CHECK_FUNCTION_DEFINITIONS
24 "-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
25 if(CMAKE_REQUIRED_LIBRARIES)
26 set(CURL_CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
27 "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
28 else(CMAKE_REQUIRED_LIBRARIES)
29 set(CURL_CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES)
30 endif(CMAKE_REQUIRED_LIBRARIES)
31 if(CMAKE_REQUIRED_INCLUDES)
32 set(CURL_CHECK_C_SOURCE_COMPILES_ADD_INCLUDES
33 "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
34 else(CMAKE_REQUIRED_INCLUDES)
35 set(CURL_CHECK_C_SOURCE_COMPILES_ADD_INCLUDES)
36 endif(CMAKE_REQUIRED_INCLUDES)
38 foreach(def ${EXTRA_DEFINES})
39 set(src "${src}#define ${def} 1\n")
41 foreach(inc ${HEADER_INCLUDES})
42 set(src "${src}#include <${inc}>\n")
45 set(src "${src}\nint main() { ${SOURCE} ; return 0; }")
46 set(CMAKE_CONFIGURABLE_FILE_CONTENT "${src}")
47 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CMake/CMakeConfigurableFile.in
48 "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
50 message(STATUS "Performing Test ${message}")
53 ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
54 COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
55 CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
56 "${CURL_CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
57 "${CURL_CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
58 OUTPUT_VARIABLE OUTPUT)
60 set(${VAR} 1 CACHE INTERNAL "Test ${message}")
61 message(STATUS "Performing Test ${message} - Success")
62 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
63 "Performing C SOURCE FILE Test ${message} succeded with the following output:\n"
65 "Source file was:\n${src}\n")
67 message(STATUS "Performing Test ${message} - Failed")
68 set(${VAR} "" CACHE INTERNAL "Test ${message}")
69 file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
70 "Performing C SOURCE FILE Test ${message} failed with the following output:\n"
72 "Source file was:\n${src}\n")
74 endif("${VAR}" MATCHES "^${VAR}$" OR "${VAR}" MATCHES "UNKNOWN")
75 endmacro(CURL_CHECK_C_SOURCE_COMPILES)