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	* configure.in (gxx_include_dir): Handle it.
	* Makefile.in: Likewise.
	* libio/configure.in (gxx_include_dir): Handle it.
	* libio/Makefile.in: Likewise.
	* libstdc++/configure.in (gxx_include_dir): Handle it.
	* libstdc++/Makefile.in: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@26126 138bc75d-0d04-0410-961f-82ee72b054a4