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Date: Mon, 10 Sep 2018 13:19:07 +0000 From: Christophe Leroy <christophe.leroy@....fr> To: Luc Van Oostenryck <luc.vanoostenryck@...il.com> Cc: Nick Desaulniers <ndesaulniers@...gle.com>, joe@...ches.com, Kees Cook <keescook@...omium.org>, LKML <linux-kernel@...r.kernel.org>, linux-sparse@...r.kernel.org, sparse@...isli.org, linuxppc-dev@...ts.ozlabs.org Subject: Re: Conflict between sparse and commit cafa0010cd51f ("Raise the minimum required gcc version to 4.6") 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@...6082vm linux-powerpc]# export REAL_CC=ppc-linux-gcc [root@...6082vm 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 >
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