Le 07/09/2018 à 20:19, Nick Desaulniers a écrit :
On Fri, Sep 7, 2018 at 11:13 AM Luc Van Oostenryck
<luc.vanoostenr...@gmail.com> wrote:
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.le...@c-s.fr> wrote:
Cc linux-spa...@vger.kernel.org
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.
So Christophe must have a version of gcc < 4.6 installed somewhere?
Does sparse use `cc`? If so, Christophe, does your `ls -l $(which cc)`
point to an old version of gcc maybe?
Indeed it looks like sparse expand these macros to the version of the
compiler it was compiled with.
I'm building kernels for a powerpc platforms, with CROSS_COMPILE set to
ppc-linux- and ppc-linux-gcc being version 5.4
However my build machine is a CentOS6 and the native gcc has version
4.4.7, so sparse expands that version.
Is there a way to get sparse in line with my cross compiler version and
not with the local native version ?
Christophe
Also, it's worth to look at what is said in this email:
https://lore.kernel.org/lkml/ca+55afzyenzr2gzlr-dwponjmnygyody+6awlcvnaywiazu...@mail.gmail.com/
-- Luc
