linux-kernel - OOT build fails on x86_64 due to missing asm/unisd

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Message-ID: <8992619.mp1cFCuObR@al>
Date:	Mon, 15 Jul 2013 21:36:12 +0200
From:	Peter Wu <lekensteyn@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	"H. Peter Anvin" <hpa@...or.com>
Subject: OOT build fails on x86_64 due to missing asm/unisd_64.h

Hi,

When I tried to build v3.11-rc1-8-g47188d3 out-of-tree, I get an error about a
missing asm/unistd_64.h file. The full build output (`git clean -xfd` was ran
before baking the kernel):

/home/me/Linux-src/build$ make O=$PWD -C ../linux -j8
make: Entering directory `/home/me/Linux-src/linux'
/home/me/Linux-src/linux/arch/x86/Makefile:107: CONFIG_X86_X32 enabled but no binutils support
make[2]: Nothing to be done for `all'.
  GEN     /tmp/build/Makefile
  CHK     include/generated/uapi/linux/version.h
make[2]: Nothing to be done for `relocs'.
  Using /home/me/Linux-src/linux as source for kernel
  CHK     include/generated/utsrelease.h
  UPD     include/generated/utsrelease.h
  CC      kernel/bounds.s
  GEN     include/generated/bounds.h
  CC      arch/x86/kernel/asm-offsets.s
In file included from /home/me/Linux-src/linux/include/uapi/linux/unistd.h:7:0,
                 from /home/me/Linux-src/linux/arch/x86/include/asm/seccomp_64.h:4,
                 from /home/me/Linux-src/linux/arch/x86/include/asm/seccomp.h:4,
                 from /home/me/Linux-src/linux/include/linux/seccomp.h:9,
                 from /home/me/Linux-src/linux/include/linux/sched.h:39,
                 from /home/me/Linux-src/linux/arch/x86/kernel/asm-offsets.c:9:
/home/me/Linux-src/linux/arch/x86/include/asm/unistd.h:23:29: fatal error: asm/unistd_64.h: No such file or directory
compilation terminated.
make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
make[1]: *** [prepare0] Error 2
make: *** [sub-make] Error 2
make: Leaving directory `/home/me/Linux-src/linux'

As a workaround, I rsync the files that are placed in the source tree:

~/Linux-src/linux/arch/x86/include/generated$ rsync -av . /tmp/build/arch/x86/include/generated/
sending incremental file list
./
asm/
asm/syscalls_32.h
uapi/
uapi/asm/
uapi/asm/unistd_32.h
uapi/asm/unistd_64.h                                                                                                                                                                                                             
uapi/asm/unistd_x32.h

I have encountered this error some releases back, and some others reported
this before[1]. If you need more details (.config?), please ask.

Regards,
Peter

 [1]: http://lkml.org/lkml/2012/3/19/680
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