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glibc/include
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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
dlfcn.h
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
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
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
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
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
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
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