PR libstdc++/14775
	* acconfig.h: Rename _GLIBCXX_MEM_LIMITS to _GLIBCXX_RES_LIMITS.
	* acinclude.m4 (GLIBCXX_CHECK_SETRLIMIT): Call
	GLIBCXX_CHECK_SETRLIMIT_ancilliary for FSIZE too, adjust define
	to _GLIBCXX_RES_LIMITS.
	(GLIBCXX_CHECK_SETRLIMIT_ancilliary): Rename HAVE_MEMLIMIT_* to
	HAVE_LIMIT_*.
	* testsuite/testsuite_hooks.h: Declare set_file_limit.
	* testsuite/testsuite_hooks.cc: Define it, using getrlimit
	and setrlimit(RLIMIT_FSIZE).
	* testsuite/27_io/fpos/14775.cc: New.
	* config.h.in: Regenerate.
	* configure: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@80289 138bc75d-0d04-0410-961f-82ee72b054a4