From: Michal Marek <mmarek@suse.cz>
Date: Mon, 2 May 2011 10:51:15 +0000 (+0200)
Subject: kbuild: Fix passing -Wno-* options to gcc 4.4+
X-Git-Tag: v3.0-rc1~310^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8417da6f2128008c431c7d130af6cd3d9079922e;p=pandora-kernel.git

kbuild: Fix passing -Wno-* options to gcc 4.4+

Starting with 4.4, gcc will happily accept -Wno-<anything> in the
cc-option test and complain later when compiling a file that has some
other warning. This rather unexpected behavior is intentional as per
http://gcc.gnu.org/PR28322, so work around it by testing for support of
the opposite option (without the no-). Introduce a new Makefile function
cc-disable-warning that does this and update two uses of cc-option in
the toplevel Makefile.

Reported-and-tested-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Michal Marek <mmarek@suse.cz>
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