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43 lines
2.0 KiB
43 lines
2.0 KiB
13 years ago
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# - Check if a symbol exists as a function, variable, or macro in C++
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# CHECK_CXX_SYMBOL_EXISTS(<symbol> <files> <variable>)
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#
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# Check that the <symbol> is available after including given header
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# <files> and store the result in a <variable>. Specify the list
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# of files in one argument as a semicolon-separated list.
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# CHECK_CXX_SYMBOL_EXISTS() can be used to check in C++ files, as opposed
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# to CHECK_SYMBOL_EXISTS(), which works only for C.
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#
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# If the header files define the symbol as a macro it is considered
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# available and assumed to work. If the header files declare the
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# symbol as a function or variable then the symbol must also be
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# available for linking. If the symbol is a type or enum value
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# it will not be recognized (consider using CheckTypeSize or
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# CheckCSourceCompiles).
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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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# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
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#=============================================================================
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# Copyright 2003-2011 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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INCLUDE(CheckSymbolExists)
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MACRO(CHECK_CXX_SYMBOL_EXISTS SYMBOL FILES VARIABLE)
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_CHECK_SYMBOL_EXISTS("${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.cxx" "${SYMBOL}" "${FILES}" "${VARIABLE}" )
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ENDMACRO(CHECK_CXX_SYMBOL_EXISTS)
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