2016-10-31 20:46:46

by Ken Moffat

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Subject: Makefile race in 4.9-rc3 (generated/autoksyms.h: No such file or directory)

I just tried to build 4.9 (rc3) for the first time (x86_64, i7 haswell)
After making my choices in make oldconfig, make -j8 failed in
less than 2 sec.

CC scripts/mod/empty.o
HOSTCC scripts/mod/mk_elfconfig
HOSTCC scripts/sortextable
CC scripts/mod/devicetable-offsets.s
In file included from ./include/linux/linkage.h:6:0,
from ./include/linux/kernel.h:6,
from ./include/asm-generic/bug.h:13,
from ./arch/x86/include/asm/bug.h:35,
from ./include/linux/bug.h:4,
from ./include/linux/jump_label.h:170,
from ./arch/x86/include/asm/string_64.h:5,
from ./arch/x86/include/asm/string.h:4,
from ./include/linux/string.h:18,
from ./include/uapi/linux/uuid.h:21,
from ./include/linux/uuid.h:19,
from ./include/linux/mod_devicetable.h:12,
from scripts/mod/devicetable-offsets.c:2:
./include/linux/export.h:81:33: fatal error: generated/autoksyms.h: No
such file or directory
#include <generated/autoksyms.h>
^
compilation terminated.
make[2]: *** [scripts/Makefile.build:154:
scripts/mod/devicetable-offsets.s] Error 1
make[1]: *** [scripts/Makefile.build:475: scripts/mod] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:559: scripts] Error 2
make: *** Waiting for unfinished jobs....

I then ran make clean and gave it another try, again using -j8.
This time i t worked, so I guess there is a race in a Makefile.

ĸen


2016-11-07 19:11:27

by Randy Dunlap

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Subject: Re: Makefile race in 4.9-rc3 (generated/autoksyms.h: No such file or directory)

[adding linux-kbuild and Michal]
[trying again]

On 10/31/16 13:46, Ken Moffat wrote:
> I just tried to build 4.9 (rc3) for the first time (x86_64, i7 haswell)
> After making my choices in make oldconfig, make -j8 failed in
> less than 2 sec.
>
> CC scripts/mod/empty.o
> HOSTCC scripts/mod/mk_elfconfig
> HOSTCC scripts/sortextable
> CC scripts/mod/devicetable-offsets.s
> In file included from ./include/linux/linkage.h:6:0,
> from ./include/linux/kernel.h:6,
> from ./include/asm-generic/bug.h:13,
> from ./arch/x86/include/asm/bug.h:35,
> from ./include/linux/bug.h:4,
> from ./include/linux/jump_label.h:170,
> from ./arch/x86/include/asm/string_64.h:5,
> from ./arch/x86/include/asm/string.h:4,
> from ./include/linux/string.h:18,
> from ./include/uapi/linux/uuid.h:21,
> from ./include/linux/uuid.h:19,
> from ./include/linux/mod_devicetable.h:12,
> from scripts/mod/devicetable-offsets.c:2:
> ./include/linux/export.h:81:33: fatal error: generated/autoksyms.h: No
> such file or directory
> #include <generated/autoksyms.h>
> ^
> compilation terminated.
> make[2]: *** [scripts/Makefile.build:154:
> scripts/mod/devicetable-offsets.s] Error 1
> make[1]: *** [scripts/Makefile.build:475: scripts/mod] Error 2
> make[1]: *** Waiting for unfinished jobs....
> make: *** [Makefile:559: scripts] Error 2
> make: *** Waiting for unfinished jobs....
>
> I then ran make clean and gave it another try, again using -j8.
> This time i t worked, so I guess there is a race in a Makefile.


--
~Randy