configure.ac: Check for more headers, functions.

2004-10-12  Frank Ch. Eigler  <fche@redhat.com>

	* configure.ac: Check for more headers, functions.
	* mf-hooks2.c (mkbuffer, unmkbuffer): New helper functions for
	tracking overridden FILE buffers.
	(fopen, setvbuf): New/revised hook functions for buffer overriding.
	(setbuf,setlinebuf,fdopen,freopen,fopen64,freopen64,fclose): Ditto.
	(fflush): Accept given NULL stream (means "all streams").
	* mf-runtime.h.in:
	* mf-runtime.c (__mfu_check): Accept accesses that span adjacent
	HEAP/GUESS objects.
	(LOOKUP_CACHE_SIZE_MAX): Raise to 64K entries tentatively.
	(__mf_adapt_cache): Use them all.
	* testsuite/libmudflap.c/pass35-frag.c: Update warning message.
	* testsuite/libmudflap.c++/ctors.exp: Ditto.
	* testsuite/libmudflap.c/{pass51,pass52}-frag.c: New tests.
	* configure, config.h.in: Regenerated.

From-SVN: r88996