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Viewing changes to CMake/CheckFunctionWithHeaderExists.cmake

  • Committer: Bazaar Package Importer
  • Author(s): Aaron M. Ucko
  • Date: 2004-12-04 12:59:54 UTC
  • mto: (2.1.1 hoary)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20041204125954-4792872ghx55a78w
Tags: upstream-1.1.6
Import upstream version 1.1.6

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Lines of Context:
CMake/CheckFunctionWithHeaderExists.cmake
 
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#
 
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# Check if the symbol exists in include files
 
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#
 
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# CHECK_FUNCTIONWITHHEADER_EXISTS - macro which checks the symbol exists in include files.
 
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# SYMBOL - symbol
 
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# FILES  - include files to check
 
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# VARIABLE - variable to return result
 
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#
 
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MACRO(CHECK_FUNCTIONWITHHEADER_EXISTS SYMBOL FILES VARIABLE)
 
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  IF("${VARIABLE}" MATCHES "^${VARIABLE}$")
 
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    SET(CHECK_SYMBOL_EXISTS_CONTENT "/* */\n")
 
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    SET(MACRO_CHECK_SYMBOL_EXISTS_FLAGS ${CMAKE_REQUIRED_FLAGS})
 
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    IF(CMAKE_REQUIRED_LIBRARIES)
 
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      SET(CHECK_SYMBOL_EXISTS_LIBS 
 
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        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
 
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    ENDIF(CMAKE_REQUIRED_LIBRARIES)
 
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    FOREACH(FILE ${FILES})
 
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      SET(CHECK_SYMBOL_EXISTS_CONTENT
 
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        "${CHECK_SYMBOL_EXISTS_CONTENT}#include <${FILE}>\n")
 
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    ENDFOREACH(FILE)
 
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    SET(CHECK_SYMBOL_EXISTS_CONTENT
 
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      "${CHECK_SYMBOL_EXISTS_CONTENT}\nint main()\n{\n${SYMBOL};return 0;\n}\n")
 
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    FILE(WRITE ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c 
 
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      "${CHECK_SYMBOL_EXISTS_CONTENT}")
 
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    MESSAGE(STATUS "Looking for ${SYMBOL}")
 
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    TRY_COMPILE(${VARIABLE}
 
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      ${CMAKE_BINARY_DIR}
 
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      ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c
 
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      CMAKE_FLAGS 
 
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      -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_SYMBOL_EXISTS_FLAGS}
 
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      "${CHECK_SYMBOL_EXISTS_LIBS}"
 
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      OUTPUT_VARIABLE OUTPUT)
 
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    IF(${VARIABLE})
 
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      MESSAGE(STATUS "Looking for ${SYMBOL} - found")
 
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      SET(${VARIABLE} 1 CACHE INTERNAL "Have symbol ${SYMBOL}")
 
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      FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log 
 
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        "Determining if the ${SYMBOL} "
 
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        "exist passed with the following output:\n"
 
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        "${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
 
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        "${CHECK_SYMBOL_EXISTS_CONTENT}\n")
 
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    ELSE(${VARIABLE})
 
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      MESSAGE(STATUS "Looking for ${SYMBOL} - not found.")
 
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      SET(${VARIABLE} "" CACHE INTERNAL "Have symbol ${SYMBOL}")
 
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      FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeError.log 
 
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        "Determining if the ${SYMBOL} "
 
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        "exist failed with the following output:\n"
 
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        "${OUTPUT}\nFile ${CMAKE_BINARY_DIR}/CMakeTmp/CheckSymbolExists.c:\n"
 
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        "${CHECK_SYMBOL_EXISTS_CONTENT}\n")
 
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    ENDIF(${VARIABLE})
 
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  ENDIF("${VARIABLE}" MATCHES "^${VARIABLE}$")
 
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ENDMACRO(CHECK_FUNCTIONWITHHEADER_EXISTS)