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From: Andreas Schwab <schwab@suse.de>
To: Florian Weimer <fweimer@redhat.com>
Cc: Florian Weimer via Libc-alpha <libc-alpha@sourceware.org>
Subject: Re: [PATCH] <time.h>: Make strptime available by default
References: <87lenvrzey.fsf@oldenburg.str.redhat.com>
	<mvmlenv89q1.fsf@suse.de> <878rjvrv1n.fsf@oldenburg.str.redhat.com>
X-Yow: Does someone from PEORIA have a SHORTER ATTENTION span than me?
Date: Mon, 28 Nov 2022 16:37:56 +0100
In-Reply-To: <878rjvrv1n.fsf@oldenburg.str.redhat.com> (Florian Weimer's
	message of "Mon, 28 Nov 2022 15:52:04 +0100")
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On Nov 28 2022, Florian Weimer wrote:

> * Andreas Schwab:
>
>> On Nov 28 2022, Florian Weimer via Libc-alpha wrote:
>>
>>> This matches what FreeBSD does.
>>
>> Does it?  What I see is that the strptime declaration is conditional on
>> __XSI_VISIBLE, which is their equivalent of __USE_XOPEN, I think.
>
> Clang without any special flags defines __XSI_VISBLE to 700 on FreeBSD
> 13.1 at least, which is why the declaration is visible by default.

<sys/cdefs.h> defines this by default:

#else				/* Default environment: show everything. */
#define	__POSIX_VISIBLE		200809
#define	__XSI_VISIBLE		700
#define	__BSD_VISIBLE		1
#define	__ISO_C_VISIBLE		2011
#define	__EXT1_VISIBLE		1
#endif

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE  1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."