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lint: require C11 for _Generic 

This does not have any effect in practice since the option -g
(originally meant for GCC extensions to the C standards) implicitly
allows all features from C11, since err.c 1.111 from 2021-04-14.

Since the default lint flags for NetBSD builds include the option -g,
this allows all C11 features.

Currently it is not possible to say "allow GNU extensions but not C11".
This commit is contained in:
rillig 2021-06-27 19:10:29 +00:00
parent 7725923054
commit cec0b2453a
7 changed files with 29 additions and 9 deletions
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4
distrib/sets/lists/tests/mi
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@ -1,4 +1,4 @@
# $NetBSD: mi,v 1.1066 2021/06/27 18:48:45 rillig Exp $
# $NetBSD: mi,v 1.1067 2021/06/27 19:10:29 rillig Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@ -6924,6 +6924,8 @@
./usr/tests/usr.bin/xlint/lint1/msg_343.exp tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/msg_344.c tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/msg_344.exp tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/msg_345.c tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/msg_345.exp tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/op_colon.c tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/op_colon.exp tests-usr.bin-tests compattestfile,atf
./usr/tests/usr.bin/xlint/lint1/stmt_for.c tests-usr.bin-tests compattestfile,atf

4
tests/usr.bin/xlint/lint1/Makefile
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@ -1,7 +1,7 @@
# $NetBSD: Makefile,v 1.67 2021/06/27 18:48:45 rillig Exp $
# $NetBSD: Makefile,v 1.68 2021/06/27 19:10:29 rillig Exp $
NOMAN= # defined
MAX_MESSAGE= 344 # see lint1/err.c
MAX_MESSAGE= 345 # see lint1/err.c
.include <bsd.own.mk>

14
tests/usr.bin/xlint/lint1/msg_345.c Normal file
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@ -0,0 +1,14 @@
/* $NetBSD: msg_345.c,v 1.1 2021/06/27 19:10:29 rillig Exp $ */
# 3 "msg_345.c"
// Test for message: generic selection requires C11 or later [345]
/* Omit flag -g since it silences c11ism. */
/* lint1-flags: -Sw */
int
test(int x)
{
/* expect+1: generic selection requires C11 or later [345] */
return _Generic(x, default: 3);
}

1
tests/usr.bin/xlint/lint1/msg_345.exp Normal file
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@ -0,0 +1 @@
msg_345.c(13): error: generic selection requires C11 or later [345]

4
tests/usr.bin/xlint/lint1/t_integration.sh
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@ -1,4 +1,4 @@
# $NetBSD: t_integration.sh,v 1.60 2021/06/27 18:48:45 rillig Exp $
# $NetBSD: t_integration.sh,v 1.61 2021/06/27 19:10:29 rillig Exp $
#
# Copyright (c) 2008, 2010 The NetBSD Foundation, Inc.
# All rights reserved.
@ -211,7 +211,7 @@ all_messages_body()
failed=""
for msg in $(seq 0 344); do
for msg in $(seq 0 345); do
name="$(printf 'msg_%03d.c' "$msg")"
check_lint1 "$name" \
|| failed="$failed${failed:+ }$name"

6
usr.bin/xlint/lint1/cgram.y
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@ -1,5 +1,5 @@
%{
/* $NetBSD: cgram.y,v 1.235 2021/06/27 18:54:14 rillig Exp $ */
/* $NetBSD: cgram.y,v 1.236 2021/06/27 19:10:29 rillig Exp $ */
/*
* Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
@ -35,7 +35,7 @@
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: cgram.y,v 1.235 2021/06/27 18:54:14 rillig Exp $");
__RCSID("$NetBSD: cgram.y,v 1.236 2021/06/27 19:10:29 rillig Exp $");
#endif
#include <limits.h>
@ -1683,6 +1683,8 @@ switch_expr:
/* TODO: c11ism */
generic_selection: /* C11 6.5.1.1 */
T_GENERIC T_LPAREN expr T_COMMA generic_assoc_list T_RPAREN {
/* generic selection requires C11 or later */
c11ism(345);
$$ = $3;
}
;

5
usr.bin/xlint/lint1/err.c
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@ -1,4 +1,4 @@
/* $NetBSD: err.c,v 1.119 2021/05/16 11:11:36 rillig Exp $ */
/* $NetBSD: err.c,v 1.120 2021/06/27 19:10:29 rillig Exp $ */
/*
* Copyright (c) 1994, 1995 Jochen Pohl
@ -37,7 +37,7 @@
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: err.c,v 1.119 2021/05/16 11:11:36 rillig Exp $");
__RCSID("$NetBSD: err.c,v 1.120 2021/06/27 19:10:29 rillig Exp $");
#endif
#include <sys/types.h>
@ -399,6 +399,7 @@ const char *const msgs[] = {
"argument to '%s' must be cast to 'unsigned char', not to '%s'", /* 342 */
"static array size is a C11 extension", /* 343 */
"bit-field of type plain 'int' has implementation-defined signedness", /* 344 */
"generic selection requires C11 or later", /* 345 */
};
static struct include_level {