On Fri, Sep 07, 2018 at 10:22:56AM -0700, Nick Desaulniers wrote:
> On Fri, Sep 7, 2018 at 7:34 AM Christophe LEROY <christophe.leroy@xxxxxx> wrote:
> >
> > Cc linux-sparse@xxxxxxxxxxxxxxx
> >
> > Le 07/09/2018 à 14:22, Christophe Leroy a écrit :
> > > Since commit cafa0010cd51f ("Raise the minimum required gcc version to
> > > 4.6"), sparse check fails as follows:
> > >
> > > [root@pc16082vm linux-powerpc]# make C=2 arch/powerpc/kernel/process.o
> > > CALL scripts/checksyscalls.sh
> > > CHECK scripts/mod/empty.c
> > > ./include/linux/compiler-gcc.h:14:3: error: Sorry, your compiler is too
> > > old - please upgrade it.
> > > CHECK arch/powerpc/kernel/process.c
> > > ./include/linux/compiler-gcc.h:14:3: error: Sorry, your compiler is too
> > > old - please upgrade it.
> > >
> > >
> > > I have sparse version 0.5.2
> > >
> > > What can be done to fix that ?
> > >
> > > Christophe
>
> Oof, sorry Christophe. Looks like that's the latest version of sparse:
> https://sparse.wiki.kernel.org/index.php/Main_Page#News
>
> I'm curious what sparse expands __GNUC__, __GNUC_MINOR__, and
> __GNUC_PATCHLEVEL__ to? Pre commit cafa0010cd51f, it MUST be
> expanding them to something, otherwise you'd have seen the error then,
> too. The previous check was GCC < 3.3, now it's GCC < 4.6.
Sparse expand these macros to the same version than the compiler used
to compile GCC. I find a bit strange though to have sparse v0.5.2 but
using an old compiler.
Also, it's worth to look at what is said in this email:
https://lore.kernel.org/lkml/CA+55aFzYEnZR2GZLR-DwpONjMNYGYoDy+6AWLCVNayWiaZuqoA@xxxxxxxxxxxxxx/
-- Luc
