Fix getpass fflush_unlocked namespace (bug 18540).

The getpass function (XPG3 / XPG4 / UNIX98) calls fflush_unlocked (not
in any of those standards).  This patch fixes this by making
fflush_unlocked into a weak alias for __fflush_unlocked and calling
__fflush_unlocked from getpass.

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

	[BZ #18540]
	* libio/iofflush.c [!_IO_MTSAFE_IO] (__fflush_unlocked): Define as
	strong alias of _IO_fflush.  Use libc_hidden_def.
	* libio/iofflush_u.c (fflush_unlocked): Rename to
	__fflush_unlocked and define as weak alias of __fflush_unlocked.
	Use libc_hidden_weak.
	* include/stdio.h (__fflush_unlocked): Declare.  Use
	libc_hidden_proto.
	* misc/getpass.c (getpass): Call __fflush_unlocked instead of
	fflush_unlocked.
	* conform/Makefile (test-xfail-UNIX98/unistd.h/linknamespace):
	Remove variable.

1 files changed, 2 insertions, 0 deletions

diff --git a/include/stdio.h b/include/stdio.h
index 9cd324bfe0..5e50e63b70 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -155,6 +155,8 @@ extern __typeof (ftello) __ftello;
 libc_hidden_proto (__ftello)
 libc_hidden_proto (fflush)
 libc_hidden_proto (fflush_unlocked)
+extern __typeof (fflush_unlocked) __fflush_unlocked;
+libc_hidden_proto (__fflush_unlocked)
 extern __typeof (fread_unlocked) __fread_unlocked;
 libc_hidden_proto (__fread_unlocked)
 libc_hidden_proto (fwrite_unlocked)