2000-08-23  Phil Edwards  <pme@sourceware.cygnus.com>

	* acconfig.h:  _GLIBCPP_USING_THREADS and some workaround types added.
	* acinclude.m4:  New macro, GLIBCPP_ENABLE_WCHAR.  Set the threads
	  definition as well, and some minor spelling/spacing fixes.  If
	  building libio, check for certain typedefs.
	* libio/_G_config.h:  Wrap _IO_MTSAFE_IO in _GLIBCPP_USING_THREADS.
	  Conditionally define _LARGEFILE64_SOURCE, otherwise the 64-bit types
	  will never be there.
	* libio/libio.h:  In the null case, _IO_lock_t can't just be void.
	* src/string-inst.cc:  Use _GLIBCPP_USE_WCHAR_T.

	* configure.in:  Update the cache a bit more often.

	* mkcheck.in:  For check-install, also need to -I the testsuite dir.

From-SVN: r35901