Messages in this thread | | | Subject | Re: Conflict between sparse and commit cafa0010cd51f ("Raise the minimum required gcc version to 4.6") | From | Christophe LEROY <> | Date | Mon, 10 Sep 2018 16:05:34 +0200 |
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Le 10/09/2018 à 15:56, Luc Van Oostenryck a écrit : > On Mon, Sep 10, 2018 at 01:19:07PM +0000, Christophe Leroy wrote: >> >> >> 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 > > OK. Using cgcc creates more problems that it solves and this file > scripts/mod/empty.c is weird. > Dropping cgcc and simply giving the GCC version to sparse works for > me here (the needed defines are given by arch/powerpc/Makefile) but > for sure I don't have the same environment as you have: > $ make CHECK="sparse -D__GNUC__=5 -D__GNUC_MINOR__=4" ...
This time it works, thanks for your help.
Should we find a may to automate that in the Makefile when CROSS_COMPILE is defined ?
> > Bonne chance,
Merci
Christophe
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