Modules/CheckIncludeFileCXX.cmake

   1 #
   2 # Check if the include file exists.
   3 #
   4 # CHECK_INCLUDE_FILE - macro which checks the include file exists.
   5 # INCLUDE - name of include file
   6 # VARIABLE - variable to return result
   7 # OPTIONAL - a third argument can be extra flags which are passed to the compiler
   8 #
   9
  10 MACRO(CHECK_INCLUDE_FILE_CXX INCLUDE VARIABLE)
  11   IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
  12     MESSAGE(STATUS "Checking for CXX include file ${INCLUDE}")
  13     SET(CHECK_INCLUDE_FILE_VAR ${INCLUDE})
  14     CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CheckIncludeFile.cxx.in
  15       ${CMAKE_BINARY_DIR}/CMakeTmp/CheckIncludeFile.cxx IMMEDIATE)
  16     IF(${ARGC} EQUAL 3)
  17       SET(CMAKE_CXX_FLAGS_SAVE ${CMAKE_CXX_FLAGS})
  18       SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${ARGV2}")
  19     ENDIF(${ARGC} EQUAL 3)
  20
  21     TRY_COMPILE(${VARIABLE}
  22       ${CMAKE_BINARY_DIR}
  23       ${CMAKE_BINARY_DIR}/CMakeTmp/CheckIncludeFile.cxx
  24       OUTPUT_VARIABLE OUTPUT)
  25
  26     IF(${ARGC} EQUAL 3)
  27       SET(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS_SAVE})
  28     ENDIF(${ARGC} EQUAL 3)
  29
  30     IF(${VARIABLE})
  31       MESSAGE(STATUS "Checking for CXX include file ${INCLUDE} -- found")
  32       SET(${VARIABLE} 1 CACHE INTERNAL "Have include ${INCLUDE}")
  33       FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
  34         "Determining if the include file ${INCLUDE} "
  35         "exists passed with the following output:\n"
  36         "${OUTPUT}\n\n")
  37     ELSE(${VARIABLE})
  38       MESSAGE(STATUS "Checking for CXX include file ${INCLUDE} -- not found")
  39       SET(${VARIABLE} "" CACHE INTERNAL "Have include ${INCLUDE}")
  40       FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log
  41         "Determining if the include file ${INCLUDE} "
  42         "exists failed with the following output:\n"
  43         "${OUTPUT}\n\n")
  44     ENDIF(${VARIABLE})
  45   ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
  46 ENDMACRO(CHECK_INCLUDE_FILE_CXX)