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master 6bd47f4 1/2: Update from Gnulib
|
From: |
Paul Eggert |
|
Subject: |
master 6bd47f4 1/2: Update from Gnulib |
|
Date: |
Sun, 3 May 2020 18:10:14 -0400 (EDT) |
branch: master
commit 6bd47f4477904a55fc08345394bfab9cd7eae2eb
Author: Paul Eggert <address@hidden>
Commit: Paul Eggert <address@hidden>
Update from Gnulib
This incorporates:
2020-05-03 attribute: new module
2020-04-13 explicit_bzero: improve code style
2020-04-13 explicit_bzero: On native Windows, use SecureZeroMemory
2020-04-13 explicit_bzero: use memset_s() when available
2020-04-04 maint: remove a stray inter-word space
* build-aux/config.guess, build-aux/config.sub:
* build-aux/gitlog-to-changelog, build-aux/update-copyright:
* doc/misc/texinfo.tex, lib/explicit_bzero.c, lib/ieee754.in.h:
* lib/nstrftime.c, m4/explicit_bzero.m4, m4/gnulib-common.m4:
Copy from Gnulib.
* lib/attribute.h: New file, copied from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
---
build-aux/config.guess | 9 +-
build-aux/config.sub | 4 +-
build-aux/gitlog-to-changelog | 4 +-
build-aux/update-copyright | 4 +-
doc/misc/texinfo.tex | 45 +++++----
lib/attribute.h | 58 +++++++++++
lib/explicit_bzero.c | 18 +++-
lib/gnulib.mk.in | 10 ++
lib/ieee754.in.h | 4 +-
lib/nstrftime.c | 9 +-
m4/explicit_bzero.m4 | 1 +
m4/gnulib-common.m4 | 229 ++++++++++++++++++++++++++++++++++++------
m4/gnulib-comp.m4 | 2 +
13 files changed, 326 insertions(+), 71 deletions(-)
diff --git a/build-aux/config.guess b/build-aux/config.guess
index 45001cf..11fda52 100755
--- a/build-aux/config.guess
+++ b/build-aux/config.guess
@@ -2,7 +2,7 @@
# Attempt to guess a canonical system name.
# Copyright 1992-2020 Free Software Foundation, Inc.
-timestamp='2020-01-01'
+timestamp='2020-04-26'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@@ -1629,6 +1629,12 @@ copies of config.guess and config.sub with the latest
versions from:
https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess
and
https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub
+EOF
+
+year=`echo $timestamp | sed 's,-.*,,'`
+# shellcheck disable=SC2003
+if test "`expr "\`date +%Y\`" - "$year"`" -lt 3 ; then
+ cat >&2 <<EOF
If $0 has already been updated, send the following data and any
information you think might be pertinent to address@hidden to
@@ -1656,6 +1662,7 @@ UNAME_RELEASE = "$UNAME_RELEASE"
UNAME_SYSTEM = "$UNAME_SYSTEM"
UNAME_VERSION = "$UNAME_VERSION"
EOF
+fi
exit 1
diff --git a/build-aux/config.sub b/build-aux/config.sub
index f02d43a..a0d1227 100755
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -2,7 +2,7 @@
# Configuration validation subroutine script.
# Copyright 1992-2020 Free Software Foundation, Inc.
-timestamp='2020-01-01'
+timestamp='2020-04-24'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
@@ -1366,7 +1366,7 @@ case $os in
| skyos* | haiku* | rdos* | toppers* | drops* | es* \
| onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
| midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
- | nsk* | powerunix)
+ | nsk* | powerunix*)
# Remember, each alternative MUST END IN *, to match a version number.
;;
qnx*)
diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
index 5112767..be8082e 100755
--- a/build-aux/gitlog-to-changelog
+++ b/build-aux/gitlog-to-changelog
@@ -31,11 +31,11 @@
# are valid code in both sh and perl. When executed by sh, they re-execute
# the script through the perl program found in $PATH. The '-x' option
# is essential as well; without it, perl would re-execute the script
-# through /bin/sh. When executed by perl, the next two lines are a no-op.
+# through /bin/sh. When executed by perl, the next two lines are a no-op.
eval 'exec perl -wSx "$0" "$@"'
if 0;
-my $VERSION = '2018-03-07 03:47'; # UTC
+my $VERSION = '2020-04-04 15:07'; # UTC
# The definition above must lie within the first 8 lines in order
# for the Emacs time-stamp write hook (at end) to update it.
# If you change this file with Emacs, please let the write hook
diff --git a/build-aux/update-copyright b/build-aux/update-copyright
index 4f79b56..d9b7f68 100755
--- a/build-aux/update-copyright
+++ b/build-aux/update-copyright
@@ -133,11 +133,11 @@
# are valid code in both sh and perl. When executed by sh, they re-execute
# the script through the perl program found in $PATH. The '-x' option
# is essential as well; without it, perl would re-execute the script
-# through /bin/sh. When executed by perl, the next two lines are a no-op.
+# through /bin/sh. When executed by perl, the next two lines are a no-op.
eval 'exec perl -wSx -0777 -pi "$0" "$@"'
if 0;
-my $VERSION = '2018-03-07.03:47'; # UTC
+my $VERSION = '2020-04-04.15:07'; # UTC
# The definition above must lie within the first 8 lines in order
# for the Emacs time-stamp write hook (at end) to update it.
# If you change this file with Emacs, please let the write hook
diff --git a/doc/misc/texinfo.tex b/doc/misc/texinfo.tex
index deca599..427494c 100644
--- a/doc/misc/texinfo.tex
+++ b/doc/misc/texinfo.tex
@@ -3,7 +3,7 @@
% Load plain if necessary, i.e., if running under initex.
\expandafter\ifx\csname fmtname\endcsname\relax\input plain\fi
%
-\def\texinfoversion{2020-02-11.09}
+\def\texinfoversion{2020-05-02.00}
%
% Copyright 1985, 1986, 1988, 1990-2019 Free Software Foundation, Inc.
%
@@ -349,34 +349,19 @@
\ifodd\pageno \advance\hoffset by \bindingoffset
\else \advance\hoffset by -\bindingoffset\fi
%
+ \checkchapterpage
+ %
% Retrieve the information for the headings from the marks in the page,
% and call Plain TeX's \makeheadline and \makefootline, which use the
% values in \headline and \footline.
%
- % This is used to check if we are on the first page of a chapter.
- \ifcase1\the\savedtopmark\fi
- \let\prevchaptername\thischaptername
- \ifcase0\firstmark\fi
- \let\curchaptername\thischaptername
- %
- \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
- %
- \ifx\curchaptername\prevchaptername
- \let\thischapterheading\thischapter
- \else
- % \thischapterheading is the same as \thischapter except it is blank
- % for the first page of a chapter. This is to prevent the chapter name
- % being shown twice.
- \def\thischapterheading{}%
- \fi
- %
% Common context changes for both heading and footing.
% Do this outside of the \shipout so @code etc. will be expanded in
% the headline as they should be, not taken literally (outputting ''code).
\def\commonheadfootline{\let\hsize=\txipagewidth \texinfochars}
%
+ \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
\global\setbox\headlinebox = \vbox{\commonheadfootline \makeheadline}%
- %
\ifodd\pageno \getoddfootingmarks \else \getevenfootingmarks \fi
\global\setbox\footlinebox = \vbox{\commonheadfootline \makefootline}%
%
@@ -423,6 +408,24 @@
\ifr@ggedbottom \kern-\dimen@ \vfil \fi}
}
+% Check if we are on the first page of a chapter.
+\def\checkchapterpage{%
+ % Get the chapter that was current at the end of the last page
+ \ifcase1\the\savedtopmark\fi
+ \let\prevchaptername\thischaptername
+ %
+ \ifodd\pageno \getoddheadingmarks \else \getevenheadingmarks \fi
+ \let\curchaptername\thischaptername
+ %
+ \ifx\curchaptername\prevchaptername
+ \let\thischapterheading\thischapter
+ \else
+ % \thischapterheading is the same as \thischapter except it is blank
+ % for the first page of a chapter. This is to prevent the chapter name
+ % being shown twice.
+ \def\thischapterheading{}%
+ \fi
+}
% Argument parsing
@@ -3101,10 +3104,10 @@ end
% Allow a ragged right output to aid breaking long URL's. There can
% be a break at the \allowbreak with no extra glue (if the existing stretch in
-% the line is sufficent), a break at the \penalty100 with extra glue added
+% the line is sufficient), a break at the \penalty100 with extra glue added
% at the end of the line, or no break at all here.
% Changing the value of the penalty and/or the amount of stretch affects how
-% preferrable one choice is over the other.
+% preferable one choice is over the other.
\def\urefallowbreak{%
\allowbreak
\hskip 0pt plus 2 em\relax
diff --git a/lib/attribute.h b/lib/attribute.h
new file mode 100644
index 0000000..8ef9a39
--- /dev/null
+++ b/lib/attribute.h
@@ -0,0 +1,58 @@
+/* ATTRIBUTE_* macros for using attributes in GCC and similar compilers
+
+ Copyright 2020 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+/* Written by Paul Eggert. */
+
+/* Provide public ATTRIBUTE_* names for the private _GL_ATTRIBUTE_*
+ macros used within Gnulib. */
+
+#ifndef _GL_ATTRIBUTE_H
+#define _GL_ATTRIBUTE_H
+
+/* C2X standard attributes have macro names that do not begin with
+ 'ATTRIBUTE_'. */
+#define DEPRECATED _GL_ATTRIBUTE_DEPRECATED
+#define FALLTHROUGH _GL_ATTRIBUTE_FALLTHROUGH
+#define MAYBE_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED
+#define NODISCARD _GL_ATTRIBUTE_NODISCARD
+
+/* Selected GCC attributes; see:
+ https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
+ These names begin with 'ATTRIBUTE_' to avoid name clashes. */
+#define ATTRIBUTE_ALLOC_SIZE(args) _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#define ATTRIBUTE_ALWAYS_INLINE _GL_ATTRIBUTE_ALWAYS_INLINE
+#define ATTRIBUTE_ARTIFICIAL _GL_ATTRIBUTE_ARTIFICIAL
+#define ATTRIBUTE_COLD _GL_ATTRIBUTE_COLD
+#define ATTRIBUTE_CONST _GL_ATTRIBUTE_CONST
+#define ATTRIBUTE_DEPRECATED _GL_ATTRIBUTE_DEPRECATED
+#define ATTRIBUTE_ERROR(msg) _GL_ATTRIBUTE_ERROR(msg)
+#define ATTRIBUTE_EXTERNALLY_VISIBLE _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#define ATTRIBUTE_FORMAT(spec) _GL_ATTRIBUTE_FORMAT(spec)
+#define ATTRIBUTE_LEAF _GL_ATTRIBUTE_LEAF
+#define ATTRIBUTE_MAY_ALIAS _GL_ATTRIBUTE_MAY_ALIAS
+#define ATTRIBUTE_MALLOC _GL_ATTRIBUTE_MALLOC
+#define ATTRIBUTE_NOINLINE _GL_ATTRIBUTE_NOINLINE
+#define ATTRIBUTE_NONNULL(args) _GL_ATTRIBUTE_NONNULL(args)
+#define ATTRIBUTE_NONSTRING _GL_ATTRIBUTE_NONSTRING
+#define ATTRIBUTE_NOTHROW _GL_ATTRIBUTE_NOTHROW
+#define ATTRIBUTE_PACKED _GL_ATTRIBUTE_PACKED
+#define ATTRIBUTE_PURE _GL_ATTRIBUTE_PURE
+#define ATTRIBUTE_RETURNS_NONNULL _GL_ATTRIBUTE_RETURNS_NONNULL
+#define ATTRIBUTE_SENTINEL(pos) _GL_ATTRIBUTE_SENTINEL(pos)
+#define ATTRIBUTE_WARNING(msg) _GL_ATTRIBUTE_WARNING(msg)
+
+#endif /* _GL_ATTRIBUTE_H */
diff --git a/lib/explicit_bzero.c b/lib/explicit_bzero.c
index c82771f..b1f5acb 100644
--- a/lib/explicit_bzero.c
+++ b/lib/explicit_bzero.c
@@ -25,8 +25,18 @@
# include <config.h>
#endif
+/* memset_s need this define */
+#if HAVE_MEMSET_S
+# define __STDC_WANT_LIB_EXT1__ 1
+#endif
+
#include <string.h>
+#if defined _WIN32 && !defined __CYGWIN__
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+#endif
+
#if _LIBC
/* glibc-internal users use __explicit_bzero_chk, and explicit_bzero
redirects to that. */
@@ -38,8 +48,12 @@
void
explicit_bzero (void *s, size_t len)
{
-#ifdef HAVE_EXPLICIT_MEMSET
- explicit_memset (s, 0, len);
+#if defined _WIN32 && !defined __CYGWIN__
+ (void) SecureZeroMemory (s, len);
+#elif HAVE_EXPLICIT_MEMSET
+ explicit_memset (s, '\0', len);
+#elif HAVE_MEMSET_S
+ (void) memset_s (s, len, '\0', len);
#else
memset (s, '\0', len);
# if defined __GNUC__ && !defined __clang__
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index 0c7c2fb..5c11dfc 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -1122,6 +1122,7 @@ pdfdir = @pdfdir@
prefix = @prefix@
program_transform_name = @program_transform_name@
psdir = @psdir@
+runstatedir = @runstatedir@
sbindir = @sbindir@
sharedstatedir = @sharedstatedir@
srcdir = @srcdir@
@@ -1208,6 +1209,15 @@ endif
endif
## end gnulib module at-internal
+## begin gnulib module attribute
+ifeq (,$(OMIT_GNULIB_MODULE_attribute))
+
+
+EXTRA_DIST += attribute.h
+
+endif
+## end gnulib module attribute
+
## begin gnulib module binary-io
ifeq (,$(OMIT_GNULIB_MODULE_binary-io))
diff --git a/lib/ieee754.in.h b/lib/ieee754.in.h
index 01ca648..d64bb46 100644
--- a/lib/ieee754.in.h
+++ b/lib/ieee754.in.h
@@ -67,7 +67,7 @@ union ieee754_float
#endif /* Little endian. */
} ieee;
- /* This format makes it easier to see if a NaN is a signaling NaN. */
+ /* This format makes it easier to see if a NaN is a signalling NaN. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
@@ -118,7 +118,7 @@ union ieee754_double
#endif /* Little endian. */
} ieee;
- /* This format makes it easier to see if a NaN is a signaling NaN. */
+ /* This format makes it easier to see if a NaN is a signalling NaN. */
struct
{
#if __BYTE_ORDER == __BIG_ENDIAN
diff --git a/lib/nstrftime.c b/lib/nstrftime.c
index fc5052a..28b539d 100644
--- a/lib/nstrftime.c
+++ b/lib/nstrftime.c
@@ -68,16 +68,9 @@ extern char *tzname[];
#include <string.h>
#include <stdbool.h>
+#include "attribute.h"
#include <intprops.h>
-#ifndef FALLTHROUGH
-# if __GNUC__ < 7
-# define FALLTHROUGH ((void) 0)
-# else
-# define FALLTHROUGH __attribute__ ((__fallthrough__))
-# endif
-#endif
-
#ifdef COMPILE_WIDE
# include <endian.h>
# define CHAR_T wchar_t
diff --git a/m4/explicit_bzero.m4 b/m4/explicit_bzero.m4
index 507816a..a415e7b 100644
--- a/m4/explicit_bzero.m4
+++ b/m4/explicit_bzero.m4
@@ -19,4 +19,5 @@ AC_DEFUN([gl_FUNC_EXPLICIT_BZERO],
AC_DEFUN([gl_PREREQ_EXPLICIT_BZERO],
[
AC_CHECK_FUNCS([explicit_memset])
+ AC_CHECK_FUNCS_ONCE([memset_s])
])
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index b4795c1..b0010d0 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 48
+# gnulib-common.m4 serial 49
dnl Copyright (C) 2007-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -15,6 +15,15 @@ AC_DEFUN([gl_COMMON], [
AC_REQUIRE([gl_ZZGNULIB])
])
AC_DEFUN([gl_COMMON_BODY], [
+ AH_VERBATIM([_GL_GNUC_PREREQ],
+[/* True if the compiler says it groks GNU C version MAJOR.MINOR. */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define _GL_GNUC_PREREQ(major, minor) \
+ ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
+#else
+# define _GL_GNUC_PREREQ(major, minor) 0
+#endif
+])
AH_VERBATIM([_Noreturn],
[/* The _Noreturn keyword of C11. */
#ifndef _Noreturn
@@ -31,12 +40,12 @@ AC_DEFUN([gl_COMMON_BODY], [
# define _Noreturn [[noreturn]]
# elif ((!defined __cplusplus || defined __clang__) \
&& (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
- || 4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+ || _GL_GNUC_PREREQ (4, 7) \
|| (defined __apple_build_version__ \
? 6000000 <= __apple_build_version__ \
: 3 < __clang_major__ + (5 <= __clang_minor__))))
/* _Noreturn works as-is. */
-# elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C
+# elif _GL_GNUC_PREREQ (2, 8) || 0x5110 <= __SUNPRO_C
# define _Noreturn __attribute__ ((__noreturn__))
# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
# define _Noreturn __declspec (noreturn)
@@ -55,48 +64,206 @@ AC_DEFUN([gl_COMMON_BODY], [
#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined
__cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
# define __GNUC_STDC_INLINE__ 1
#endif])
- AH_VERBATIM([unused_parameter],
-[/* Define as a marker that can be attached to declarations that might not
- be used. This helps to reduce warnings, such as from
- GCC -Wunused-parameter. */
-#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
-# define _GL_UNUSED __attribute__ ((__unused__))
+ AH_VERBATIM([attribute],
+[/* Attributes. */
+#ifdef __has_attribute
+# define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
#else
-# define _GL_UNUSED
+# define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
+# define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
+# define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
+# define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
+# define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
+# define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
+# define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
+# ifdef _ICC
+# define _GL_ATTR_may_alias 0
+# else
+# define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
+# endif
+# define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
+# define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
+# define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
+# define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
+# define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
+# define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
+# define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
+# define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
+# define _GL_ATTR_warn_unused_result_GL_GNUC_PREREQ (3, 4)
#endif
-/* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
- is a misnomer outside of parameter lists. */
-#define _UNUSED_PARAMETER_ _GL_UNUSED
-
-/* gcc supports the "unused" attribute on possibly unused labels, and
- g++ has since version 4.5. Note to support C++ as well as C,
- _GL_UNUSED_LABEL should be used with a trailing ; */
-#if !defined __cplusplus || __GNUC__ > 4 \
- || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
-# define _GL_UNUSED_LABEL _GL_UNUSED
+
+]dnl There is no _GL_ATTRIBUTE_ALIGNED; use stdalign's _Alignas instead.
+[
+#if _GL_HAS_ATTRIBUTE (alloc_size)
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
#else
-# define _GL_UNUSED_LABEL
+# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
#endif
-/* The __pure__ attribute was added in gcc 2.96. */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
-# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#if _GL_HAS_ATTRIBUTE (always_inline)
+# define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
#else
-# define _GL_ATTRIBUTE_PURE /* empty */
+# define _GL_ATTRIBUTE_ALWAYS_INLINE
#endif
-/* The __const__ attribute was added in gcc 2.95. */
-#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
+#if _GL_HAS_ATTRIBUTE (artificial)
+# define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+#else
+# define _GL_ATTRIBUTE_ARTIFICIAL
+#endif
+
+/* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
+ <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>. */
+#if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+# define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+#else
+# define _GL_ATTRIBUTE_COLD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (const)
# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
#else
-# define _GL_ATTRIBUTE_CONST /* empty */
+# define _GL_ATTRIBUTE_CONST
#endif
-/* The __malloc__ attribute was added in gcc 3. */
-#if 3 <= __GNUC__
+#if 201710L < __STDC_VERSION__
+# define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#elif _GL_HAS_ATTRIBUTE (deprecated)
+# define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+#else
+# define _GL_ATTRIBUTE_DEPRECATED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (error)
+# define _GL_ATTRIBUTE_ERROR(msg) __attribute__((__error__ (msg)))
+# define _GL_ATTRIBUTE_WARNING(msg) __attribute__((__warning__ (msg)))
+#else
+# define _GL_ATTRIBUTE_ERROR(msg)
+# define _GL_ATTRIBUTE_WARNING(msg)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (externally_visible)
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+#else
+# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#endif
+
+/* FALLTHROUGH is special, because it always expands to something. */
+#if 201710L < __STDC_VERSION__
+# define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#elif _GL_HAS_ATTRIBUTE (fallthrough)
+# define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+#else
+# define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (format)
+# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+#else
+# define _GL_ATTRIBUTE_FORMAT(spec)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (leaf)
+# define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+#else
+# define _GL_ATTRIBUTE_LEAF
+#endif
+
+#if _GL_HAS_ATTRIBUTE (may_alias)
+# define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+#else
+# define _GL_ATTRIBUTE_MAY_ALIAS
+#endif
+
+#if 201710L < __STDC_VERSION__
+# define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#elif _GL_HAS_ATTRIBUTE (unused)
+# define _GL_ATTRIBUTE_MAYBE_UNUSED __attribute__ ((__unused__))
+#else
+# define _GL_ATTRIBUTE_MAYBE_UNUSED
+#endif
+/* Earlier spellings of this macro. */
+#define _GL_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED
+#define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
+
+#if _GL_HAS_ATTRIBUTE (malloc)
# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
#else
-# define _GL_ATTRIBUTE_MALLOC /* empty */
+# define _GL_ATTRIBUTE_MALLOC
+#endif
+
+#if 201710L < __STDC_VERSION__
+# define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#elif _GL_HAS_ATTRIBUTE (warn_unused_result)
+# define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+#else
+# define _GL_ATTRIBUTE_NODISCARD
+#endif
+
+#if _GL_HAS_ATTRIBUTE (noinline)
+# define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+#else
+# define _GL_ATTRIBUTE_NOINLINE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonnull)
+# define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+#else
+# define _GL_ATTRIBUTE_NONNULL(args)
+#endif
+
+#if _GL_HAS_ATTRIBUTE (nonstring)
+# define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+#else
+# define _GL_ATTRIBUTE_NONSTRING
+#endif
+
+/* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead. */
+
+#if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+# define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+#else
+# define _GL_ATTRIBUTE_NOTHROW
+#endif
+
+#if _GL_HAS_ATTRIBUTE (packed)
+# define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+#else
+# define _GL_ATTRIBUTE_PACKED
+#endif
+
+#if _GL_HAS_ATTRIBUTE (pure)
+# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+#else
+# define _GL_ATTRIBUTE_PURE
+#endif
+
+#if _GL_HAS_ATTRIBUTE (returns_nonnull)
+# define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+#else
+# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#endif
+
+#if _GL_HAS_ATTRIBUTE (sentinel)
+# define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+#else
+# define _GL_ATTRIBUTE_SENTINEL(pos)
+#endif
+
+]dnl There is no _GL_ATTRIBUTE_VISIBILITY; see m4/visibility.m4 instead.
+[
+/* To support C++ as well as C, use _GL_UNUSED_LABEL with trailing ';'. */
+#if !defined __cplusplus || _GL_GNUC_PREREQ (4, 5)
+# define _GL_UNUSED_LABEL _GL_ATTRIBUTE_MAYBE_UNUSED
+#else
+# define _GL_UNUSED_LABEL
#endif
])
AH_VERBATIM([async_safe],
diff --git a/m4/gnulib-comp.m4 b/m4/gnulib-comp.m4
index d5faa9a..3717024 100644
--- a/m4/gnulib-comp.m4
+++ b/m4/gnulib-comp.m4
@@ -47,6 +47,7 @@ AC_DEFUN([gl_EARLY],
# Code from module alloca-opt:
# Code from module allocator:
# Code from module at-internal:
+ # Code from module attribute:
# Code from module binary-io:
# Code from module builtin-expect:
# Code from module byteswap:
@@ -934,6 +935,7 @@ AC_DEFUN([gl_FILE_LIST], [
lib/allocator.h
lib/arg-nonnull.h
lib/at-func.c
+ lib/attribute.h
lib/binary-io.c
lib/binary-io.h
lib/byteswap.in.h