[2.6 patch] add -Werror-implicit-function-declaration to CFLAGS

[Sam Ravnborg]

On Fri, Nov 11, 2005 at 01:24:43PM -0800, Andrew Morton wrote:
> Adrian Bunk <bunk at stusta.de> wrote:
> >
> > > > > 
> > > > > Sorry, I need to build allmodconfig kernels on wacky architectures (eg
> > > > > ppc64) and this patch is killing me.
> > > > 
> > > > Can you send me the list of compile errors so that I can work on fixing 
> > > > them?
> > > > 
> > > 
> > > No handily, sorry.   Missing virt_to_bus() is the typical problem.
> > >
> > 
> > But in this case -Werror-implicit-function-declaration doesn't create 
> > new compile errors, it only moves compile errors from compile time to 
> > link or depmod time - which is IMHO not a bad change.
> 
> It is a quite inconvenient change if you want to get full coverage with
> `make allmodconfig'.

It could be a Kconfig item if enabled or not.
Then you could use the new mechanishm in kconfig to disable it for your
allmodconfig builds.

cat allmod.config
CONFIG_CC_ERROR_IMPLICIT_FUNCTION_DECLARATION = 0


That should do the trick, but maybe too inconvinient??

	Sam