Wold-style-declaration (PR7651 Define -Wextra strictly in terms of other warning flags)

["Manuel LÃpez-IbÃÃez" <lopezibanez at gmail dot com>]

:ADDPATCH c:

This patch continues the effort to fix PR7651 [1].

A new option -Wold-style-declaration takes over the warning about
storage-class specifiers like "static" that are not the first things
in a declaration. I have generalized the description a bit more, so it
could encompass any other obsolescent usage in a declaration. This
patch also updates the documentation to reflect that the warning only
applies to C. The new option is enabled by -Wextra, so we keep the
current behaviour but add the ability to enable/disable this
individual warning.

Bootstrapped and regression tested with --enable-languages=all on
i686-pc-linux-gnu.

OK for mainline?

[1] http://gcc.gnu.org/ml/gcc-patches/2006-12/msg01103.html


2006-12-29  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

 PR middle-end/7651
 * c.opt (Wold-style-declaration): New.
 * doc/invoke.texi (C-only Warning Options): New.
 (Wold-style-declaration): Document it.
 (Wextra): Enabled by -Wextra.
 * c-opts.c (c_common_post_options): Enabled by -Wextra.
 * c-decl.c (declspecs_add_scspec): Replace -Wextra with
-Wold-style-declaration.

testsuite/
2006-12-29  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

 PR middle-end/7651
 * gcc.dg/declspec-3.c: Replace -W with -Wold-style-declaration.
 * gcc.dg/declspec-3-Wextra.c: New.
 * gcc.dg/declspec-3-no.c: New

Attachment: wold-style-declaration.diff
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