* ainclude.m4 (GLIBCPP_CHEC_MATH_DECLS_AND_LINKAGE_1): New macro.
	(GLIBCPP_CHECK_MATH_SUPPORT): Use it.
	(GLIBCPP_CHECK_TYPE_SUPPORT): Don't autoconf ctype information if
	its already provided in config.target.
	* aclocal.m4: Regenerated.
	* configure: Likewise.
	* configure.target: Set ctype_include_dir for lots of systems.
	* libsupc++/Makefile.am: Explicitly include --tag disable-shared.
	* libsupc++/Makefile.in: Regenerated.

From-SVN: r39196