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Date: Tue, 13 Feb 2018 15:15:24 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: shmctl not found when compiling compiler-rt

* 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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