| # 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(CheckSymbolExists) |
| |
| macro(CHECK_CXX_SYMBOL_EXISTS SYMBOL FILES VARIABLE) |
| _CHECK_SYMBOL_EXISTS("${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckSymbolExists.cxx" "${SYMBOL}" "${FILES}" "${VARIABLE}" ) |
| endmacro() |