NetBSD Problem Report #56402
From www@netbsd.org Tue Sep 14 23:34:30 2021
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for <gnats-bugs@gnats.NetBSD.org>; Tue, 14 Sep 2021 23:34:30 +0000 (UTC)
Message-Id: <20210914233429.1BA7A1A9239@mollari.NetBSD.org>
Date: Tue, 14 Sep 2021 23:34:29 +0000 (UTC)
From: k0ga@shike2.com
Reply-To: k0ga@shike2.com
To: gnats-bugs@NetBSD.org
Subject: Definition of lldiv_t with ANSI_SOURCE and POSIX_SOURCE
X-Send-Pr-Version: www-1.0
>Number: 56402
>Category: standards
>Synopsis: Definition of lldiv_t with ANSI_SOURCE and POSIX_SOURCE
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: standards-manager
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Sep 14 23:35:00 +0000 2021
>Originator: Roberto E. Vargas Caballero
>Release: NetBSD 9.1
>Organization:
>Environment:
NetBSD odin 9.1 NetBSD 9.1 (GENERIC) #0: Sun Oct 18 19:24:30 UTC 2020 mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
When a source file including stdlib.h is compiled with the flags -_ANSI_SOURCE and _POSIX_SOURCE the compilation fails with the error:
/usr/include/stdlib.h:227:1: error: unknown type name 'lldiv_t'; did you mean 'ldiv_t'?
Looking in the /usr/include/stdlib.h we find:
#if !defined(_ANSI_SOURCE) && \
(defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
(__cplusplus - 0) >= 201103L || defined(_NETBSD_SOURCE))
typedef struct {
/* LONGLONG */
long long int quot; /* quotient */
/* LONGLONG */
long long int rem; /* remainder */
} lldiv_t;
#endif
...
#if defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
defined(_NETBSD_SOURCE) || (__cplusplus - 0) >= 201103L
/* LONGLONG */
long long int atoll(const char *);
/* LONGLONG */
long long int llabs(long long int);
/* LONGLONG */
lldiv_t lldiv(long long int, long long int);
/* LONGLONG */
long long int strtoll(const char * __restrict, char ** __restrict, int);
/* LONGLONG */
unsigned long long int
strtoull(const char * __restrict, char ** __restrict, int);
float strtof(const char * __restrict, char ** __restrict);
long double strtold(const char * __restrict, char ** __restrict);
#endif
We can see that the definition of lldiv_t is enabled only when !defined(_ANSI_SOURCE) but lldiv() is declared regardless of the value of _ANSI_SOURCE. The same check should be used in both places.
>How-To-Repeat:
$ cat <<EOF > f.c
#define _ANSI_SOURCE
#define _POSIX_SOURCE
#include <stdlib.h>
int
main(void)
{
return 0;
}
EOF
$ cc f.c
In file included from f.c:4:0:
/usr/include/stdlib.h:227:1: error: unknown type name 'lldiv_t'; did you mean 'ldiv_t'?
>Fix:
--- /usr/include/stdlib.h 2020-10-18 21:24:30.000000000 +0200
+++ /usr/include/stdlib.h.new 2021-09-15 01:02:48.399518921 +0200
/*
* ISO C99
*/
-#if defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
- defined(_NETBSD_SOURCE) || (__cplusplus - 0) >= 201103L
+#if !defined(_ANSI_SOURCE) && \
+ (defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
+ (__cplusplus - 0) >= 201103L || defined(_NETBSD_SOURCE))
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$NetBSD: query-full-pr,v 1.46 2020/01/03 16:35:01 leot Exp $
$NetBSD: gnats_config.sh,v 1.9 2014/08/02 14:16:04 spz Exp $
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