e3a091fb3c9fbf127006178b553723376de5d01d
[platform/upstream/cmake.git] / Modules / CheckCSourceRuns.cmake
1 # - Check if the given C source code compiles and runs.
2 # CHECK_C_SOURCE_RUNS(<code> <var>)
3 #  <code>   - source code to try to compile
4 #  <var>    - variable to store the result
5 #             (1 for success, empty for failure)
6 # The following variables may be set before calling this macro to
7 # modify the way the check is run:
8 #
9 #  CMAKE_REQUIRED_FLAGS = string of compile command line flags
10 #  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
11 #  CMAKE_REQUIRED_INCLUDES = list of include directories
12 #  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
13
14 #=============================================================================
15 # Copyright 2006-2009 Kitware, Inc.
16 #
17 # Distributed under the OSI-approved BSD License (the "License");
18 # see accompanying file Copyright.txt for details.
19 #
20 # This software is distributed WITHOUT ANY WARRANTY; without even the
21 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
22 # See the License for more information.
23 #=============================================================================
24 # (To distribute this file outside of CMake, substitute the full
25 #  License text for the above reference.)
26
27
28
29 macro(CHECK_C_SOURCE_RUNS SOURCE VAR)
30   if("${VAR}" MATCHES "^${VAR}$")
31     set(MACRO_CHECK_FUNCTION_DEFINITIONS
32       "-D${VAR} ${CMAKE_REQUIRED_FLAGS}")
33     if(CMAKE_REQUIRED_LIBRARIES)
34       set(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES
35         LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
36     else()
37       set(CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES)
38     endif()
39     if(CMAKE_REQUIRED_INCLUDES)
40       set(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES
41         "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
42     else()
43       set(CHECK_C_SOURCE_COMPILES_ADD_INCLUDES)
44     endif()
45     file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c"
46       "${SOURCE}\n")
47
48     message(STATUS "Performing Test ${VAR}")
49     try_run(${VAR}_EXITCODE ${VAR}_COMPILED
50       ${CMAKE_BINARY_DIR}
51       ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
52       COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
53       ${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}
54       CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
55       -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
56       "${CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
57       COMPILE_OUTPUT_VARIABLE OUTPUT)
58     # if it did not compile make the return value fail code of 1
59     if(NOT ${VAR}_COMPILED)
60       set(${VAR}_EXITCODE 1)
61     endif()
62     # if the return value was 0 then it worked
63     if("${${VAR}_EXITCODE}" EQUAL 0)
64       set(${VAR} 1 CACHE INTERNAL "Test ${VAR}")
65       message(STATUS "Performing Test ${VAR} - Success")
66       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
67         "Performing C SOURCE FILE Test ${VAR} succeded with the following output:\n"
68         "${OUTPUT}\n"
69         "Return value: ${${VAR}}\n"
70         "Source file was:\n${SOURCE}\n")
71     else()
72       if(CMAKE_CROSSCOMPILING AND "${${VAR}_EXITCODE}" MATCHES  "FAILED_TO_RUN")
73         set(${VAR} "${${VAR}_EXITCODE}")
74       else()
75         set(${VAR} "" CACHE INTERNAL "Test ${VAR}")
76       endif()
77
78       message(STATUS "Performing Test ${VAR} - Failed")
79       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
80         "Performing C SOURCE FILE Test ${VAR} failed with the following output:\n"
81         "${OUTPUT}\n"
82         "Return value: ${${VAR}_EXITCODE}\n"
83         "Source file was:\n${SOURCE}\n")
84
85     endif()
86   endif()
87 endmacro()
88