CMake/CurlCheckCSourceRuns.cmake

   1 # - Check if the source code provided in the SOURCE argument compiles and runs.
   2 # CURL_CHECK_C_SOURCE_RUNS(SOURCE VAR)
   3 # - macro which checks if the source code runs
   4 #  SOURCE   - source code to try to compile
   5 #  VAR - variable to store size if the type exists.
   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(CURL_CHECK_C_SOURCE_RUNS SOURCE VAR)
  16   if("${VAR}" MATCHES "^${VAR}$" OR "${VAR}" MATCHES "UNKNOWN")
  17     set(message "${VAR}")
  18     # If the number of arguments is greater than 2 (SOURCE VAR)
  19     if(${ARGC} GREATER 2)
  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)
  37     set(src "")
  38     foreach(def ${EXTRA_DEFINES})
  39       set(src "${src}#define ${def} 1\n")
  40     endforeach(def)
  41     foreach(inc ${HEADER_INCLUDES})
  42       set(src "${src}#include <${inc}>\n")
  43     endforeach(inc)
  44
  45     set(src "${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"
  49       IMMEDIATE)
  50     message(STATUS "Performing Test ${message}")
  51     try_run(${VAR} ${VAR}_COMPILED
  52       ${CMAKE_BINARY_DIR}
  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)
  59     # if it did not compile make the return value fail code of 1
  60     if(NOT ${VAR}_COMPILED)
  61       set(${VAR} 1)
  62     endif(NOT ${VAR}_COMPILED)
  63     # if the return value was 0 then it worked
  64     set(result_var ${${VAR}})
  65     if("${result_var}" EQUAL 0)
  66       set(${VAR} 1 CACHE INTERNAL "Test ${message}")
  67       message(STATUS "Performing Test ${message} - Success")
  68       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
  69         "Performing C SOURCE FILE Test ${message} succeded with the following output:\n"
  70         "${OUTPUT}\n"
  71         "Return value: ${${VAR}}\n"
  72         "Source file was:\n${src}\n")
  73     else("${result_var}" EQUAL 0)
  74       message(STATUS "Performing Test ${message} - Failed")
  75       set(${VAR} "" CACHE INTERNAL "Test ${message}")
  76       file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
  77         "Performing C SOURCE FILE Test ${message} failed with the following output:\n"
  78         "${OUTPUT}\n"
  79         "Return value: ${result_var}\n"
  80         "Source file was:\n${src}\n")
  81     endif("${result_var}" EQUAL 0)
  82   endif("${VAR}" MATCHES "^${VAR}$" OR "${VAR}" MATCHES "UNKNOWN")
  83 endmacro(CURL_CHECK_C_SOURCE_RUNS)