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Date: Tue, 13 Feb 2018 15:36:34 +0100
From: Matúš Olekšák <oleksak.matus@...il.com>
To: musl@...ts.openwall.com
Subject: Re: shmctl not found when compiling compiler-rt

I assumed it's the same problem a had last week on pure llvm environment
and I discovered bug in compiler-rt detection which solves my patch.

2018-02-13 15:33 GMT+01:00 Dmitry Golovin <dima@...ovin.in>:

> Thank you for the patch, but I don't think it is relevant to this problem.
>
> If you take a look at my build script, you'll see that I don't need it:
> https://github.com/tpimh/ngtc/blob/alpine/build.sh#L73
>
> Regards,
> Dmitry
>
> 13.02.2018, 16:31, "Matúš Olekšák" <oleksak.matus@...il.com>:
> > Try this patch to correctly link compiler-rt.
> >
> > 2018-02-13 15:15 GMT+01:00 Szabolcs Nagy <nsz@...t70.net>:
> >> * Dmitry Golovin <dima@...ovin.in> [2018-02-13 15:34:34 +0200]:
> >>> I'm trying to compile compiler-rt with musl and it used to be fine,
> but I can't succeed with recent versions of compiler-rt.
> >>>
> >>> The compilation fails because of the lack of real_shmctl while musl
> clearly has shmctl: http://git.musl-libc.org/cgit/
> musl/tree/src/ipc/shmctl.c
> >>>
> >>> Here is the complete output:
> >>>
> >>>     llvm/projects/compiler-rt/lib/msan/msan_interceptors.cc:1446:15:
> error: no member named 'real_shmctl' in namespace '__interception'; did you
> mean 'real_ioctl'?
> >>>         int res = REAL(shmctl)(shmid, shmctl_ipc_stat, &ds);
> >>>                   ^~~~~~~~~~~~
> >>
> >> there should be a
> >>
> >> DECLARE_REAL(int, shmctl, int shmid, int cmd, void *buf)
> >>
> >> in that file which defines __interception::real_shmctl.
> >>
> >>> To compile without glibc on linux using this patch:
> >>> https://github.com/tpimh/ngtc/blob/alpine/patch/compiler-rt-
> 01-sanitizer-nongnu.patch
> >>>
> >>> Regards,
> >>> Dmitry
>

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