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42 lines
1.2 KiB
CMake
42 lines
1.2 KiB
CMake
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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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# The following variables may be set before calling this macro to
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# modify the way the check is run:
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#
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# CMAKE_REQUIRED_FLAGS = string of compile command line flags
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# CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
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# CMAKE_REQUIRED_INCLUDES = list of include directories
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# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
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#
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# Redistribution and use is allowed according to the terms of the BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
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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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int main()
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{
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#ifndef ${_SYMBOL}
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int i = sizeof(&${_SYMBOL});
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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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