patch trunk: seek plugin also in a language specific directory when given a short name

[Basile Starynkevitch]

Hello All,

Reference http://gcc.gnu.org/ml/gcc-patches/2011-06/msg00477.html - I
am essentially pinging it, but improving the ChangeLog entry.

The attached patch to trunk 175201 makes cc1, cc1plus, ... lto1 also
search a language specific subdirectory.

##### gcc/ChangeLog entry ######
2011-06-20  Basile Starynkevitch  <basile@starynkevitch.net>

	* plugin.c: Update copyright year.
	(PLUGIN_FILE_SUFFIX): New macro.
	(add_new_plugin): Short-named plugins are also searched in a
	language-specific sub-directory.

	* doc/plugins.texi (Loading Plugins): Document how short-named
	plugins are searched in a language-specific sub-directory.
	(Plugin callbacks): Remind that PLUGIN_PRAGMAS event is not
	possible from lto1.
################################

Ok for trunk? With what changes?

Regards.

-- 
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/
email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359
8, rue de la Faiencerie, 92340 Bourg La Reine, France
*** opinions {are only mine, sont seulement les miennes} ***
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