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Re: [hurd,commited] hurd sendmsg: Fix warning on calling CMSG_*HDR
- From: Andreas Schwab <schwab at linux-m68k dot org>
- To: libc-alpha at sourceware dot org
- Cc: bug-hurd at gnu dot org, commit-hurd at gnu dot org
- Date: Sun, 29 Dec 2019 19:08:37 +0100
- Subject: Re: [hurd,commited] hurd sendmsg: Fix warning on calling CMSG_*HDR
- References: <20191229165108.2856915-1-samuel.thibault@ens-lyon.org> <87imlz83a5.fsf@igel.home> <20191229172134.4krdvteczuxf5y64@function>
On Dez 29 2019, Samuel Thibault wrote:
> Andreas Schwab, le dim. 29 déc. 2019 18:12:02 +0100, a ecrit:
>> > - for (; cmsg; cmsg = CMSG_NXTHDR (message, cmsg))
>> > + for (; cmsg; cmsg = CMSG_NXTHDR ((struct msghdr *) message, cmsg))
>>
>> Why is the first argument of __cmsg_nxthdr not const?
>
> I don't know, it is so on other systems as well.
>
> I guess an issue is that if it was const, CMSG_NXTHDR would only
> be allowed to return a const,
The return value is not based on the first argument.
Andreas.
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Andreas Schwab, schwab@linux-m68k.org
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