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Date:      Tue, 8 Jul 2025 22:16:57 +0300
From:      Konstantin Belousov <kostikbel@gmail.com>
To:        John Baldwin <jhb@freebsd.org>
Cc:        src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org
Subject:   Re: git: 01a679715f68 - main - err(3): print extended error if available
Message-ID:  <aG1uqV1ezVbAIjKZ@kib.kiev.ua>
In-Reply-To: <a7393703-0117-4eaa-a0bd-a6b284905330@FreeBSD.org>
References:  <202507071928.567JSk8Y012639@gitrepo.freebsd.org> <a7393703-0117-4eaa-a0bd-a6b284905330@FreeBSD.org>

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On Tue, Jul 08, 2025 at 03:09:32PM -0400, John Baldwin wrote:
> On 7/7/25 15:28, Konstantin Belousov wrote:
> > The branch main has been updated by kib:
> > 
> > URL: https://cgit.FreeBSD.org/src/commit/?id=01a679715f68d5e32efecafc1f158eecec3f781b
> > 
> > commit 01a679715f68d5e32efecafc1f158eecec3f781b
> > Author:     Konstantin Belousov <kib@FreeBSD.org>
> > AuthorDate: 2025-06-16 21:26:22 +0000
> > Commit:     Konstantin Belousov <kib@FreeBSD.org>
> > CommitDate: 2025-07-07 18:44:22 +0000
> > 
> >      err(3): print extended error if available
> >      Reviewed by:    asomers, brooks
> >      Sponsored by:   The FreeBSD Foundation
> >      Differential revision:  https://reviews.freebsd.org/D51141
> 
> It looks like this broke cross-building as all of the GitHub cross-build
> actions are failing now after this commit, e.g.:
> 
> https://github.com/freebsd/freebsd-src/actions/runs/16126095376/job/45503237749
> 
> /home/runner/work/freebsd-src/freebsd-src/lib/libc//gen/err.c:33:10: fatal error: sys/exterrvar.h: No such file or directory
>    33 | #include <sys/exterrvar.h>
>       |          ^~~~~~~~~~~~~~~~~
> compilation terminated.
> --- err.o ---
> *** [err.o] Error code 1
> 
> bmake[3]: stopped making "all" in /home/runner/work/freebsd-src/freebsd-src/tools/build
> bmake[3]: 1 error
> 
> bmake[3]: stopped making "all" in /home/runner/work/freebsd-src/freebsd-src/tools/build
> --- legacy ---
> *** [legacy] Error code 2
> 
> bmake[2]: stopped making "legacy" in /home/runner/work/freebsd-src/freebsd-src
> bmake[2]: 1 error
> 
> bmake[2]: stopped making "legacy" in /home/runner/work/freebsd-src/freebsd-src
> Command exited with non-zero status 2
> 3.30user 0.79system 0:01.27elapsed 321%CPU (0avgtext+0avgdata 71296maxresident)k
> 1200inputs+2984outputs (8major+109216minor)pagefaults 0swaps
> --- _legacy ---
> 
> bmake[1]: stopped making "kernel-toolchain" in /home/runner/work/freebsd-src/freebsd-src
> --- kernel-toolchain ---
> 
> bmake: stopped making "kernel-toolchain" in /home/runner/work/freebsd-src/freebsd-src
> Error: Process completed with exit code 2.
> 
> Presumably we are building a native libegacy on Linux that includes err.c, so we
> need to either guard the new #include or add a compat <sys/exterrvar.h> header with
> a stub implementation?

I think that the guard would be not enough, the real compat header with some
content like

#define	UEXTERROR_MAXLEN 128

static inline int
uexterr_gettext(char *buf, size_t len)
{
	if (len > 0)
		buf[0] = '\0';
	return (0);
}
should work better.



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