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- # Distributed under the OSI-approved BSD 3-Clause License. See accompanying
- # file Copyright.txt or https://cmake.org/licensing for details.
- #.rst:
- # CheckCXXSymbolExists
- # --------------------
- #
- # Check if a symbol exists as a function, variable, or macro in C++
- #
- # CHECK_CXX_SYMBOL_EXISTS(<symbol> <files> <variable>)
- #
- # Check that the <symbol> is available after including given header
- # <files> and store the result in a <variable>. Specify the list of
- # files in one argument as a semicolon-separated list.
- # CHECK_CXX_SYMBOL_EXISTS() can be used to check in C++ files, as
- # opposed to CHECK_SYMBOL_EXISTS(), which works only for C.
- #
- # If the header files define the symbol as a macro it is considered
- # available and assumed to work. If the header files declare the symbol
- # as a function or variable then the symbol must also be available for
- # linking. If the symbol is a type or enum value it will not be
- # recognized (consider using CheckTypeSize or CheckCSourceCompiles).
- #
- # The following variables may be set before calling this macro to modify
- # the way the check is run:
- #
- # ::
- #
- # CMAKE_REQUIRED_FLAGS = string of compile command line flags
- # CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
- # CMAKE_REQUIRED_INCLUDES = list of include directories
- # CMAKE_REQUIRED_LIBRARIES = list of libraries to link
- # CMAKE_REQUIRED_QUIET = execute quietly without messages
- include_guard(GLOBAL)
- include(CheckSymbolExists)
- macro(CHECK_CXX_SYMBOL_EXISTS SYMBOL FILES VARIABLE)
- __CHECK_SYMBOL_EXISTS_IMPL("${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.cxx" "${SYMBOL}" "${FILES}" "${VARIABLE}" )
- endmacro()
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