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
