From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>,
joe@perches.com, Kees Cook <keescook@chromium.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-sparse@vger.kernel.org, sparse@chrisli.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: Conflict between sparse and commit cafa0010cd51f ("Raise the minimum required gcc version to 4.6")
Date: Mon, 10 Sep 2018 13:19:07 +0000 [thread overview]
Message-ID: <9409138a-dc14-2b12-edc0-cfa0b471da6e@c-s.fr> (raw)
In-Reply-To: <20180910113448.dxnfvznyimtj3tkv@ltop.local>
On 09/10/2018 11:34 AM, Luc Van Oostenryck wrote:
> On Mon, Sep 10, 2018 at 09:56:33AM +0000, Christophe Leroy wrote:
>>
>> # 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
>
> OK. Clearly nobody has ever used it so :(
> There is an infinite loop because cgcc use the env var CHECK
> to call sparse while kbuild use CHECK to call cgcc here.
>
> The following seems to work here.
> $ export REAL_CC=ppc-linux-gcc
> $ make CHECK="CHECK=sparse cgcc -target=ppc ...
Not yet ...
[root@pc16082vm linux-powerpc]# export REAL_CC=ppc-linux-gcc
[root@pc16082vm linux-powerpc]# make CHECK="CHECK=sparse cgcc
-target=ppc -D_CALL_ELF=2 -D__GNUC__=5 -D__GNUC_MINOR__=4" C=2
arch/powerpc/kernel/process.o
CALL scripts/checksyscalls.sh
CHECK scripts/mod/empty.c
<command-line>:0:0: warning: "__STDC__" redefined
<built-in>: note: this is the location of the previous definition
/opt/cldk-1.4.0/lib/gcc/ppc-linux/5.4.0/../../../../ppc-linux/lib/crt1.o:(.rodata+0x4):
undefined reference to `main'
collect2: error: ld returned 1 exit status
make[2]: *** [scripts/mod/empty.o] Error 1
make[1]: *** [scripts/mod] Error 2
make: *** [scripts] Error 2
Christophe
>
> It's a bit kludgy, I admit.
>
> -- Luc
>
next prev parent reply other threads:[~2018-09-10 13:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <81a5fd11-366c-0897-4143-d8d041420a41@c-s.fr>
2018-09-07 14:33 ` Conflict between sparse and commit cafa0010cd51f ("Raise the minimum required gcc version to 4.6") Christophe LEROY
2018-09-07 17:22 ` Nick Desaulniers
2018-09-07 18:13 ` Luc Van Oostenryck
2018-09-07 18:19 ` Nick Desaulniers
2018-09-07 18:37 ` Luc Van Oostenryck
2018-09-10 6:49 ` Christophe LEROY
2018-09-10 9:28 ` Luc Van Oostenryck
2018-09-10 9:56 ` Christophe Leroy
2018-09-10 11:34 ` Luc Van Oostenryck
2018-09-10 13:19 ` Christophe Leroy [this message]
2018-09-10 13:56 ` Luc Van Oostenryck
2018-09-10 14:05 ` Christophe LEROY
2018-09-10 15:15 ` Luc Van Oostenryck
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