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plplot/plplot-5.9.9/cmake/modules/CheckPrototypeExists.cmake

 

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# AWI, downloaded from KDE repository since has not yet been transferred

 

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# to cmake repository as of 2006-07-31.

 

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# http://websvn.kde.org/trunk/KDE/kdelibs/cmake/modules/CheckPrototypeExists.cmake?rev=505849&view=markup

 

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#

 

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# - Check if the prototype for a function exists.

 

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# CHECK_PROTOTYPE_EXISTS (FUNCTION HEADER VARIABLE)

 

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#

 

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#  FUNCTION - the name of the function you are looking for

 

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#  HEADER - the header(s) where the prototype should be declared

 

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#  VARIABLE - variable to store the result

 

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#

 

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# AWI further change from C++ to C since that is the core PLplot language.

 

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INCLUDE(CheckCSourceCompiles)

 

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MACRO(CHECK_PROTOTYPE_EXISTS _SYMBOL _HEADER _RESULT)

 

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   SET(_INCLUDE_FILES)

 

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   FOREACH(it ${_HEADER})

 

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      SET(_INCLUDE_FILES "${_INCLUDE_FILES}#include <${it}>\n")

 

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   ENDFOREACH(it)

 

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   SET(_CHECK_PROTO_EXISTS_SOURCE_CODE "

 

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${_INCLUDE_FILES}

 

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void cmakeRequireSymbol(int dummy,...){(void)dummy;}

 

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int main()

 

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{

 

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#ifndef ${_SYMBOL}

 

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#ifndef _MSC_VER

 

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  cmakeRequireSymbol(0,&${_SYMBOL});

 

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#else

 

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  char i = sizeof(&${_SYMBOL});

 

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#endif

 

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#endif

 

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  return 0;

 

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}

 

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")

 

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   CHECK_C_SOURCE_COMPILES("${_CHECK_PROTO_EXISTS_SOURCE_CODE}" ${_RESULT})

 

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ENDMACRO(CHECK_PROTOTYPE_EXISTS _SYMBOL _HEADER _RESULT)

 

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