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Date: Tue, 13 Feb 2018 15:33:10 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: Re: shmctl not found when compiling compiler-rt

* Matúš Olekšák <oleksak.matus@...il.com> [2018-02-13 15:30:45 +0100]:
> Try this patch to correctly link compiler-rt.
> 

why would a linker flag change fix a compile time issue?

> 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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