|
|
|
|
# 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()
|
