[PATCH] Don't ignore packed on char bitfields (4.0 regression)

[Eric Botcazou]

> 	* c-decl.c (finish_struct): Move code to set DECL_PACKED after
> 	DECL_BIT_FIELD is alreay known.  Also inherit packed for bitfields
> 	regardless of their type.
> 	* c-common.c (handle_packed_attribute): Don't ignore packed on
> 	bitfields.
> 	* c.opt (Wpacked-bitfield-compat): New warning option.
> 	* stor-layout.c (place_field): Warn if offset of a field changed.
> 	* doc/extend.texi (packed): Mention the ABI change.
> 	* doc/invoke.texi (-Wpacked-bitfield-compat): Document.
> 	(Warning Options): Add it to the list.

Please make sure that the warning is only issued in the affected languages, 
the patch is responsible for the following regression in Ada:

FAIL: gnat.dg/rep_clause2.adb (test for excess errors)

Thanks in advance.

-- 
Eric Botcazou