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From: "ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug analyzer/107807] gcc.dg/analyzer/errno-1.c FAILs
Date: Tue, 22 Nov 2022 13:23:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107807

--- Comment #2 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot U=
ni-Bielefeld.DE> ---
> --- Comment #1 from David Malcolm <dmalcolm at gcc dot gnu.org> ---

> I've tested errno-1.c with glibc's errno.h, and with a simple "extern int
> errno;".
>
> What does <errno.h> look like on your machine?  In particular, how is "er=
rno"
> defined/declared?  Thanks.

It's a bit more complicated here, boiling down to

extern int *___errno(void) __attribute__((__const__));
#define errno (*(___errno()))

You will find something similar e.g. on Mac OS X 10.7, btw.:

extern int * __error(void);
#define errno (*__error())=