Modules/CheckIncludeFiles.cmake

   1 #
   2 # Check if the files can be included
   3 #
   4 # CHECK_INCLUDE_FILES - macro which checks the include file exists.
   5 # INCLUDE - list of files to include
   6 # VARIABLE - variable to return result
   7 #
   8
   9 MACRO(CHECK_INCLUDE_FILES INCLUDE VARIABLE)
  10   IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
  11     SET(CHECK_INCLUDE_FILES_CONTENT "/* */\n")
  12     SET(MACRO_CHECK_INCLUDE_FILES_FLAGS ${CMAKE_REQUIRED_FLAGS})
  13     FOREACH(FILE ${INCLUDE})
  14       SET(CHECK_INCLUDE_FILES_CONTENT
  15         "${CHECK_INCLUDE_FILES_CONTENT}#include <${FILE}>\n")
  16     ENDFOREACH(FILE)
  17     SET(CHECK_INCLUDE_FILES_CONTENT
  18       "${CHECK_INCLUDE_FILES_CONTENT}\n\nint main(){return 0;}\n")
  19     FILE(WRITE ${CMAKE_BINARY_DIR}/CMakeTmp/CheckIncludeFiles.c
  20       "${CHECK_INCLUDE_FILES_CONTENT}")
  21
  22     MESSAGE(STATUS "Looking for include files ${VARIABLE}")
  23     TRY_COMPILE(${VARIABLE}
  24       ${CMAKE_BINARY_DIR}
  25       ${CMAKE_BINARY_DIR}/CMakeTmp/CheckIncludeFiles.c
  26       CMAKE_FLAGS
  27       -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_INCLUDE_FILES_FLAGS}
  28       OUTPUT_VARIABLE OUTPUT)
  29     IF(${VARIABLE})
  30       MESSAGE(STATUS "Looking for include files ${VARIABLE} - found")
  31       SET(${VARIABLE} 1 CACHE INTERNAL "Have include ${VARIABLE}")
  32       FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
  33         "Determining if files ${INCLUDE} "
  34         "exist passed with the following output:\n"
  35         "${OUTPUT}\n\n")
  36     ELSE(${VARIABLE})
  37       MESSAGE(STATUS "Looking for include files ${VARIABLE} - not found.")
  38       SET(${VARIABLE} "" CACHE INTERNAL "Have includes ${VARIABLE}")
  39       FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
  40         "Determining if files ${INCLUDE} "
  41         "exist failed with the following output:\n"
  42         "${OUTPUT}\nSource:\n${CHECK_INCLUDE_FILES_CONTENT}\n")
  43     ENDIF(${VARIABLE})
  44   ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
  45 ENDMACRO(CHECK_INCLUDE_FILES)