Provides a macro to check if a header file can be included in CXX.
CHECK_INCLUDE_FILE_CXX CHECK_INCLUDE_FILE_CXX(<include> <variable> [<flags>])
Check if the given <include> file may be included in a CXX source file and store the result in an internal cache entry named <variable>. The optional third argument may be used to add compilation flags to the check (or use CMAKE_REQUIRED_FLAGS below).
The following variables may be set before calling this macro to modify the way the check is run:
CMAKE_REQUIRED_FLAGS CMAKE_REQUIRED_DEFINITIONS CMAKE_REQUIRED_INCLUDES CMAKE_REQUIRED_LIBRARIES CMP0075.CMAKE_REQUIRED_QUIET See modules CheckIncludeFile and CheckIncludeFiles to check for one or more C headers.
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Licensed under the BSD 3-clause License.
https://cmake.org/cmake/help/v3.12/module/CheckIncludeFileCXX.html