* Commit fc72ae40e303 broke x86-64 build environment.
@ 2018-01-14 5:13 Rob Landley
2018-01-14 5:31 ` vcaputo
0 siblings, 1 reply; 2+ messages in thread
From: Rob Landley @ 2018-01-14 5:13 UTC (permalink / raw)
To: linux-kernel
You've made the ORC unwinder part of allnoconfig, which means trying to
build "make ARCH=x86_64 allnoconfig" requires installing a new package
(libelf-dev) or else the build breaks.
What's worse, if I go into menuconfig and switch it back to frame
pointer, the build STILL breaks:
$ make -j 8
Makefile:932: *** "Cannot generate ORC metadata for
CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or
elfutils-libelf-devel". Stop.
$ grep UNWIND .config
# CONFIG_UNWINDER_ORC is not set
CONFIG_UNWINDER_FRAME_POINTER=y
# CONFIG_UNWINDER_GUESS is not set
As far as I can tell, x86-64 doesn't build anymore without libelf-dev.
It's a new hard requirement for the build.
Why?
Rob
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Commit fc72ae40e303 broke x86-64 build environment.
2018-01-14 5:13 Commit fc72ae40e303 broke x86-64 build environment Rob Landley
@ 2018-01-14 5:31 ` vcaputo
0 siblings, 0 replies; 2+ messages in thread
From: vcaputo @ 2018-01-14 5:31 UTC (permalink / raw)
To: Rob Landley; +Cc: linux-kernel
On Sat, Jan 13, 2018 at 11:13:13PM -0600, Rob Landley wrote:
> You've made the ORC unwinder part of allnoconfig, which means trying to
> build "make ARCH=x86_64 allnoconfig" requires installing a new package
> (libelf-dev) or else the build breaks.
>
> What's worse, if I go into menuconfig and switch it back to frame
> pointer, the build STILL breaks:
>
> $ make -j 8
> Makefile:932: *** "Cannot generate ORC metadata for
> CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or
> elfutils-libelf-devel". Stop.
> $ grep UNWIND .config
> # CONFIG_UNWINDER_ORC is not set
> CONFIG_UNWINDER_FRAME_POINTER=y
> # CONFIG_UNWINDER_GUESS is not set
>
> As far as I can tell, x86-64 doesn't build anymore without libelf-dev.
> It's a new hard requirement for the build.
>
FYI this has already been brought up on lkml:
https://patchwork.kernel.org/patch/10137237/
IIRC you can get things working by deleting include/config/auto.conf
when you've switched back to CONFIG_UNWINDER_FRAME_POINTER.
I don't believe anything other than making CONFIG_UNWINDER_ORC the
default was intentional. The frustration is just a consequence of some
build system bug.
Regards,
Vito Caputo
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2018-01-14 5:31 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-01-14 5:13 Commit fc72ae40e303 broke x86-64 build environment Rob Landley
2018-01-14 5:31 ` vcaputo
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).