2012-10-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/54465
	* lang.opt (Wextra):  Add.
	* invoke.texi:  Document that -Wc-binding-type, -Wconversion
	and -Wline-truncation are implied by -Wall.  Document that
	-Wcompare-reals is implied by -Wextra.  Document -Wextra.
	* options.c (set_Wextra):  New function.
	(gfc_handle_option):  Handle -Wextra.

2012-10-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/54465
	* gfortran.dg/wextra_1.f:  New test.

From-SVN: r192649