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Date: Thu, 26 Mar 2020 10:49:41 -0400
From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Cc: Baruch Siach <baruch@tkos.co.il>
Message-ID: <20200326144941.GB11469@brightrain.aerifal.cx>
References: <87lfnndzwv.fsf@tarshish>
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In-Reply-To: <87lfnndzwv.fsf@tarshish>
User-Agent: Mutt/1.5.21 (2010-09-15)
Subject: Re: [musl] Switch to 64-bit time_t breaks strace build

On Thu, Mar 26, 2020 at 03:11:12PM +0200, Baruch Siach wrote:
> Hi musl list,
> 
> Commit 381433396 (switch all existing 32-bit archs to 64-bit time_t)
> changed the IPC_STAT value on 32-bit arches from 2 to 0x102. This break
> strace build time assertion of IPC_STAT value:
> 
> In file included from ./static_assert.h:11,
>                  from xlat/msgctl_flags.h:4,
>                  from ipc_msgctl.c:32:
> xlat/msgctl_flags.h:22:1: error: static assertion failed: "IPC_STAT != 2"
>  static_assert((IPC_STAT) == (2), "IPC_STAT != 2");
> 
> I that a strace bug?

Yes, it's one of the things mentioned in the time64 release notes:

https://musl.libc.org/time64.html

The upstream bug is:

https://github.com/strace/strace/issues/116

and it's fixed in:

https://github.com/strace/strace/commit/ce2c968a614ae2a3cf2354620b3b8200f003e87c

There are also some other non-build-breaking bugs with decoding of
structs, such as:

https://github.com/strace/strace/issues/122

I suspect most if not all are fixed now but I haven't checked lately.

Rich