On 09/10/2018 09:28 AM, Luc Van Oostenryck wrote:
On Mon, Sep 10, 2018 at 08:49:07AM +0200, Christophe LEROY wrote:
Le 07/09/2018 à 20:19, Nick Desaulniers a écrit :
On Fri, Sep 7, 2018 at 11:13 AM Luc Van Oostenryck wrote:
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.
OK, I see.
Is there a way to get sparse in line with my cross compiler version
and not with the local native version ?
When cross-compiling, there is also things like the machine word-size
and the endianness to take in account (they also default to the
native compiler used to compile sparse itself) as well as a few
defines (like __PPC64__). To be in line with your cross-compiler
you can use to the wrapper 'cgcc' (installed with sparse) and call
it, for example, like this:
$ export REAL_CC=ppc-linux-gcc
$ cgcc -target=ppcc64 -D_CALL_ELF=2 -D__GCC__=5 -D__GCC_MINOR__=4 ...
or, since this is for the kernel:
$ export REAL_CC=ppc-linux-gcc
$ make CHECK='cgcc -target=ppcc64 ...
I think this should solve it. Do not hesitate to report any
difficulties you may encounter.
# export REAL_CC=ppc-linux-gcc
# make CHECK="cgcc -target=ppc -D_CALL_ELF=2 -D__GCC__=5
-D__GCC_MINOR__=4" C=2 arch/powerpc/kernel/process.o
scripts/kconfig/conf --syncconfig Kconfig
#
# configuration written to .config
#
UPD include/config/kernel.release
UPD include/generated/utsrelease.h
CC kernel/bounds.s
CC arch/powerpc/kernel/asm-offsets.s
CALL scripts/checksyscalls.sh
CHECK scripts/mod/empty.c
Can't exec "/bin/sh": Argument list too long at /usr/local/bin/cgcc line 86.
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2
Christophe
-- Luc
