Zack Weinberg c03073774f Make _REENTRANT and _THREAD_SAFE aliases for _POSIX_C_SOURCE=199506L. ... For many years, the only effect of these macros has been to make unistd.h declare getlogin_r. _POSIX_C_SOURCE >= 199506L also causes this function to be declared. However, people who don't carefully read all the headers might be confused into thinking they need to define _REENTRANT for any threaded code (as was indeed the case a long time ago). Therefore, remove __USE_REENTRANT, and make _REENTRANT and _THREAD_SAFE into synonyms for _POSIX_C_SOURCE=199506L. This will only affect programs that don't select a higher conformance level some other way. For instance, -std=c89 -D_REENTRANT will see a change in visible declarations, but -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT won't, and -D_REENTRANT all by itself also won't, because _DEFAULT_SOURCE implies _POSIX_C_SOURCE > 199506. * include/features.h: Remove __USE_REENTRANT. Treat _REENTRANT and _THREAD_SAFE the same as _POSIX_C_SOURCE=199506L, if a higher POSIX conformance level has not been selected by other macros. * NEWS, manual/creature.texi: Document this change. * posix/unistd.h, posix/bits/unistd.h: Don't check __USE_REENTRANT. * include/libc-symbols.h: Don't define _REENTRANT. * scripts/check-installed-headers.sh: Don't undefine _REENTRANT.		2016-12-08 15:45:33 -05:00
..
arpa	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
bits	Installed-header hygiene (BZ#20366): time.h types.	2016-09-23 08:43:56 -04:00
gnu	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
net
netinet	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
programs	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
protocols
rpc	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
rpcsvc	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
sys	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
aio.h
aliases.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
alloca.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
argp.h
argz.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
assert.h
atomic.h	Use C11-like atomics instead of plain memory accesses in x86 lock elision.	2016-12-05 16:19:43 +01:00
byteswap.h
caller.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
complex.h
cpio.h
crypt.h	Add include/crypt.h.	2016-10-28 22:40:16 -04:00
ctype.h
des.h
dirent.h	Mark internal dirent functions hidden	2015-10-15 14:15:41 -07:00
dlfcn.h	Mark _dl_catch_error hidden	2015-10-15 14:13:50 -07:00
elf.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
endian.h
envz.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
err.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
errno.h
error.h
execinfo.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
fcntl.h	hurd: Do not hide rtld symbols which need to be preempted	2016-03-20 19:51:42 +01:00
features.h	Make _REENTRANT and _THREAD_SAFE aliases for _POSIX_C_SOURCE=199506L.	2016-12-08 15:45:33 -05:00
fenv.h	Mark fegetround pure (bug 16296).	2015-09-15 20:36:50 +00:00
fmtmsg.h
fnmatch.h
fpu_control.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
ftw.h
gconv.h
getopt_int.h
getopt.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
glob.h
gmp.h
gnu-versions.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
grp-merge.h	NSS: Implement group merging support.	2016-04-29 22:18:21 -04:00
grp.h
gshadow.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
iconv.h
ifaddrs.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
ifunc-impl-list.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
inline-hashtab.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
langinfo.h
libc-internal.h	Bug 20729: Fix building with -Os.	2016-10-29 23:50:56 -04:00
libc-symbols.h	Make _REENTRANT and _THREAD_SAFE aliases for _POSIX_C_SOURCE=199506L.	2016-12-08 15:45:33 -05:00
libgen.h
libintl.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
libio.h
limits.h	Fix LONG_WIDTH, ULONG_WIDTH include ordering issue.	2016-10-04 16:17:59 +00:00
link.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
list.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
locale.h
malloc.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
math.h	Fix lgamma setting signgam for ISO C (bug 15421).	2015-11-20 22:49:59 +00:00
mcheck.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
memory.h
mntent.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
monetary.h
mqueue.h
netdb.h
netgroup.h
nl_types.h
nss.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
nsswitch.h
obstack.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
poll.h
printf.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
pthread.h
pty.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
pwd.h	Harden putpwent, putgrent, putspent, putspent against injection [BZ #18724]	2015-10-02 11:34:13 +02:00
regex.h
resolv.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
rounding-mode.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
sched.h	posix: New Linux posix_spawn{p} implementation	2016-03-07 11:53:47 +07:00
scratch_buffer.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
search.h
set-hooks.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
setjmp.h	Mark internal setjmp functions hidden	2015-10-15 14:22:25 -07:00
sgtty.h
shadow.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
shlib-compat.h	Add support for referencing specific symbol versions	2016-08-02 17:18:08 +02:00
signal.h	Mark ld.so internel sigaction functions hidden	2015-10-15 14:23:31 -07:00
spawn.h
stab.h
stackinfo.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
stap-probe.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
stdc-predef.h	Revert __malloc_initialize_hook symbol poisoning	2016-06-20 11:11:29 +02:00
stdio_ext.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
stdio.h	Fix crypt snprintf namespace (bug 20829).	2016-11-16 22:46:48 +00:00
stdlib.h	Refactor strtod parsing of NaN payloads.	2015-11-24 22:24:52 +00:00
string.h	Add _STRING_INLINE_unaligned and string_private.h	2016-02-18 14:55:29 -02:00
strings.h
stropts.h
stubs-prologue.h
syscall.h
sysexits.h
syslog.h
tar.h
termios.h
tgmath.h
time.h	Installed-header hygiene (BZ#20366): time.h types.	2016-09-23 08:43:56 -04:00
ttyent.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
uchar.h
ucontext.h
ulimit.h
unistd.h	Fix hurd __access_noerrno implementation.	2016-11-18 16:49:08 -02:00
utime.h
utmp.h	Installed header hygiene (BZ#20366): Test of installed headers.	2016-09-23 08:43:56 -04:00
values.h	Update copyright dates with scripts/update-copyrights.	2016-01-04 16:05:18 +00:00
wchar.h	Use __typeof instead of typeof	2016-06-04 09:19:09 +02:00
wctype.h
wordexp.h
xlocale.h