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Document handling of unrecognized -Wno- options

Message ID alpine.LNX.2.00.1008151847091.10053@acrux.dbai.tuwien.ac.at
State New
Headers show

Commit Message

Gerald Pfeifer Aug. 15, 2010, 6:26 p.m. UTC 
On Thu, 15 Apr 2010, Diego Novillo wrote:
> +When an unrecognized warning label is requested (e.g.,
> +@option{-Wunknown-warning}), GCC will emit a diagnostic stating
> +that the option is not recognized.  However, if the @samp{-Wno-} form
> +is used, the behavior is slightly different: No diagnostic will be
> +produced for @option{-Wno-unknown-warning} unless other diagnostics
> +are being produced.  This allows the use of new @option{-Wno-} options
> +with old compilers, but if something goes wrong, the compiler will
> +warn that an unrecognized option was used.

I noticed that the committed patch has "warning label", not "warning
option" so it looks like you committed the older version of the patch
without this change, Diego?  (Cf. 
http://gcc.gnu.org/ml/gcc-patches/2010-04/msg00905.html)

Also, I changed @samp to @option in one instance to be consistent.

Installed.

Gerald


2010-08-15  Gerald Pfeifer  <gerald@pfeifer.com>

	* doc/invoke.texi (Warning Options): Fix terminology and markup
	in the description of how unknown warning options are handled.
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Patch

Index: doc/invoke.texi
===================================================================
--- doc/invoke.texi	(revision 163027)
+++ doc/invoke.texi	(working copy)
@@ -2863,9 +2863,9 @@ 
 language-specific options also refer to @ref{C++ Dialect Options} and
 @ref{Objective-C and Objective-C++ Dialect Options}.
 
-When an unrecognized warning label is requested (e.g.,
+When an unrecognized warning option is requested (e.g.,
 @option{-Wunknown-warning}), GCC will emit a diagnostic stating
-that the option is not recognized.  However, if the @samp{-Wno-} form
+that the option is not recognized.  However, if the @option{-Wno-} form
 is used, the behavior is slightly different: No diagnostic will be
 produced for @option{-Wno-unknown-warning} unless other diagnostics
 are being produced.  This allows the use of new @option{-Wno-} options