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glibc/misc
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Adhemerval Zanella c8ba52ab33 misc: Sync cdefs.h with gnulib 
It adds __glibc_has_builtin, __glibc_has_extension, and
__attribute_maybe_unused__ alongsize with some fixes.

The differences are:

--- glibc
+++ gnulib
@@ -259,7 +259,9 @@
 # define __attribute_const__ /* Ignore */
 #endif

-#if __GNUC_PREREQ (2,7) || __glibc_has_attribute (__unused__)
+#if defined __STDC_VERSION__ && 201710L < __STDC_VERSION__
+# define __attribute_maybe_unused__ [[__maybe_unused__]]
+#elif __GNUC_PREREQ (2,7) || __glibc_has_attribute (__unused__)
 # define __attribute_maybe_unused__ __attribute__ ((__unused__))
 #else
 # define __attribute_maybe_unused__ /* Ignore */
@@ -485,7 +487,7 @@

 /* The #ifndef lets Gnulib avoid including these on non-glibc
    platforms, where the includes typically do not exist.  */
-#ifdef __GLIBC__
+#ifndef __WORDSIZE
 # include <bits/wordsize.h>
 # include <bits/long-double.h>
 #endif

The [[__attribute_maybe_unused__]] attribute removal __ is due Joseph
questioning gcc support with -std=c2x or -std=gnu2x [1].

The _WORDSIZE replacement by __GLIBC__ is because it does not play
well with internal cdefs.h that also uses
__LDOUBLE_REDIRECTS_TO_FLOAT128_ABI.

Checked on x86_64-linux-gnu.

[1] https://sourceware.org/pipermail/libc-alpha/2021-January/121600.html
2021-02-09 16:57:52 -03:00
..
bits Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sys misc: Sync cdefs.h with gnulib 2021-02-09 16:57:52 -03:00
acct.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
allocate_once.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ar.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
brk.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
bug18240.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
bug-hsearch1.c
chflags.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
chroot.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
daemon.c Remove internal usage of extensible stat functions 2020-09-11 14:35:32 -03:00
dirname.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
efgcvt_r-template.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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efgcvt-dbl-macros.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
efgcvt-ldbl-macros.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
efgcvt-template.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
efgcvt.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
err.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
err.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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fchflags.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fd_to_filename.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fdatasync.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fgetxattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
flistxattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
fremovexattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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fstab.h
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gethostname.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
getloadavg.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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getpass.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
getsysstats.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
getttyent.c Fix -Os getc_unlocked linknamespace, localplt issues (bug 15105, bug 19463). 2018-02-21 18:01:11 +00:00
getusershell.c Remove internal usage of extensible stat functions 2020-09-11 14:35:32 -03:00
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gtty.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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listxattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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lremovexattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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lutimes.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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Makefile Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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mmap.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mntent_r.c mntent: Use __putc_unlocked instead of fputc_unlocked 2021-01-08 21:02:12 +05:30
mntent.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mntent.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mprotect.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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preadv2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
preadv64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
preadv64v2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
preadv.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pselect.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ptrace.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pwritev2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pwritev64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pwritev64v2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
pwritev.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
qefgcvt_r.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
qefgcvt.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
readv.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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regexp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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removexattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
revoke.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sbrk.c Use hidden visibility for early static PIE code 2021-01-21 15:55:01 +00:00
search.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
select.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
setdomain.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
setegid.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
seteuid.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sethostid.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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setxattr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sgtty.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
single_threaded.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sstk.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stab.h
stty.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
swapoff.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
swapon.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sync.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
syncfs.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
syscall.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
syscall.h
sysexits.h
syslog.c Correct locking and cancellation cleanup in syslog functions (bug 26100) 2020-08-18 11:27:03 +02:00
syslog.h
truncate64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
truncate.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tsearch.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-allocate_once.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-atomic-long.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-atomic.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-dbl-efgcvt.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-dirname.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-efgcvt-template.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-empty.c Move all tests out of the csu subdirectory 2016-12-21 11:52:19 +01:00
tst-error1.c Split DIAG_* macros to new header libc-diag.h. 2017-02-25 09:59:46 -05:00
tst-fd_to_filename.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-fdset.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-gethostid.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-hsearch.c Modify several tests to use test-skeleton.c 2014-11-05 15:24:08 +05:30
tst-insremque.c
tst-ldbl-efgcvt.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-ldbl-error.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-ldbl-warn.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-makedev.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mntent2.c Fix warning in misc/tst-mntent2.c. 2014-12-16 10:27:16 +01:00
tst-mntent-autofs.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mntent-blank-corrupt.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mntent-blank-passno.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mntent-escape.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-mntent.c getmntent: fix memory corruption w/blank lines [BZ #18887] 2015-08-29 18:07:00 -04:00
tst-preadvwritev2-common.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-preadvwritev2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-preadvwritev64.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-preadvwritev64v2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-preadvwritev-common.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-preadvwritev.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-pselect.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-syscalls.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-tsearch.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-warn-wide.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ttyent.h
ttyslot.c As a minor cleanup remove the (r)index defines from include/string.h as 2017-02-06 18:15:18 +00:00
ualarm.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
usleep.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ustat.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
utimes.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
Versions Add the __libc_single_threaded variable 2020-07-06 11:15:58 +02:00
vhangup.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
writev.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00