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Date: Tue, 13 Feb 2018 15:51:38 +0100
From: Matúš Olekšák <oleksak.matus@...il.com>
To: musl@...ts.openwall.com
Subject: Re: shmctl not found when compiling compiler-rt

Oh, now I read it again and I realize you try to compile compiler-rt and
not musl. I'm so sorry for misunderstanding. I had a rough day.

PS: Sorry for spam

2018-02-13 15:36 GMT+01:00 Matúš Olekšák <oleksak.matus@...il.com>:

> 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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