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Date: Sat, 26 Nov 2016 17:24:43 -0500
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Cc: Sebastian Kemper <sebastian_ml@....net>
Subject: Re: Robust shared mutexes?
On Sat, Nov 26, 2016 at 10:49:44PM +0100, Sebastian Kemper wrote:
> Hello all,
>
> I'm cross-compiling for OpenWRT/LEDE and have this variable
> apr_cv_mutex_robust_shared. Should I set it to yes or no with musl? I've
> searched around but found conflicting infos. One post said there's no
> shared mutex support in musl
Do you have a link for that? If there's incorrect information I'd like
to reply and see if it can be corrected.
> and the other said there is. And if there
> is support for it then I'm not sure how robust it is :D
musl fully supports robust mutexes, process-shared or not. They are a
requirement for current POSIX.
> Other variables that I think are set correctly but if you disagreed I'd
> be happy to hear about:
>
> ac_cv_va_copy=yes
Yes. This is true for any conforming C implementation.
> ac_cv_func_realloc_0_nonnull=yes
> ac_cv_func_malloc_0_nonnull=yes
Yes. These are not strict requirements, but if malloc(0) returns a
null pointer, behavior of realloc becomes a huge mess. All reasonable
implementations should return a unique pointer for each malloc(0)
call.
> ac_cv_func_setpgrp_void=yes
Yes, this is a POSIX requirement.
> ac_cv_func_pthread_rwlock_init=yes
Yes. So is this.
> Please keep me on CC if you reply as I'm not subscribed to this list.
OK.
Rich
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