diff --git a/CMakeModules/CheckCXXSymbolExists.cmake b/CMakeModules/CheckCXXSymbolExists.cmake new file mode 100644 index 0000000000..f5968bf2d2 --- /dev/null +++ b/CMakeModules/CheckCXXSymbolExists.cmake @@ -0,0 +1,42 @@ +# - Check if a symbol exists as a function, variable, or macro in C++ +# CHECK_CXX_SYMBOL_EXISTS( ) +# +# Check that the is available after including given header +# and store the result in a . 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 + +#============================================================================= +# Copyright 2003-2011 Kitware, Inc. +# +# Distributed under the OSI-approved BSD License (the "License"); +# see accompanying file Copyright.txt for details. +# +# This software is distributed WITHOUT ANY WARRANTY; without even the +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +# See the License for more information. +#============================================================================= +# (To distribute this file outside of CMake, substitute the full +# License text for the above reference.) + +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()