Fix mq_receive, mq_send mq_timed* namespace (bug 18545).

mq_receive calls mq_timedreceive, and mq_send calls mq_timedsend.  But
mq_receive and mq_send were in POSIX by 1996, while mq_timed* were
added in the 2001 edition of POSIX.  This patch fixes this by making
mq_timed* into weak aliases for __mq_timed* and calling the
__mq_timed* names.

Tested for x86_64 and x86 (testsuite, and that disassembly of
installed shared libraries is unchanged by the patch).

	[BZ #18545]
	* rt/mq_timedreceive.c (mq_timedreceive): Rename to
	__mq_timedreceive and define as alias of __mq_timedreceive.  Use
	hidden_weak.
	* rt/mq_timedsend.c (mq_timedsend): Rename to __mq_timedsend and
	define as alias of __mq_timedsend.  Use hidden_weak.
	* sysdeps/unix/sysv/linux/syscalls.list (mq_timedsend): Use
	__mq_timedsend as strong name.
	(mq_timedreceive): Use __mq_timedreceive as strong name.
	* include/mqueue.h (__mq_timedsend): Declare.  Use hidden_proto.
	(__mq_timedreceive): Likewise.
	* sysdeps/unix/sysv/linux/mq_receive.c (mq_receive): Call
	__mq_timedreceive instead of mq_timedreceive.
	* sysdeps/unix/sysv/linux/mq_send.c (mq_send): Call __mq_timedsend
	instead of mq_timedsend.
	* conform/Makefile (test-xfail-UNIX98/mqueue.h/linknamespace):
	Remove variable.

1 files changed, 4 insertions, 2 deletions

diff --git a/rt/mq_timedreceive.c b/rt/mq_timedreceive.c
index b6c1d2a5e1..c476c68696 100644
--- a/rt/mq_timedreceive.c
+++ b/rt/mq_timedreceive.c
@@ -21,12 +21,14 @@
 /* Receive the oldest from highest priority messages in message queue
    MQDES, stop waiting if ABS_TIMEOUT expires.  */
 ssize_t
-mq_timedreceive (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
+__mq_timedreceive (mqd_t mqdes, char *__restrict msg_ptr, size_t msg_len,
 		 unsigned int *__restrict msg_prio,
 		 const struct timespec *__restrict abs_timeout)
 {
   __set_errno (ENOSYS);
   return -1;
 }
-hidden_def (mq_timedreceive)
+hidden_def (__mq_timedreceive)
+weak_alias (__mq_timedreceive, mq_timedreceive)
+hidden_weak (mq_timedreceive)
 stub_warning (mq_timedreceive)