Fix search.h namespace (bug 17996).

The implementation of the (XSI POSIX) functions hsearch / hcreate /
hdestroy uses hsearch_r / hcreate_r / hdestroy_r, which are not POSIX
functions.  This patch makes those into weak aliases for __*_r and
uses those names for the calls within libc.

Tested for x86_64 that the disassembly of installed shared libraries
is unchanged by this patch.

	[BZ #17996]
	* include/search.h (hcreate_r): Don't use libc_hidden_proto.
	(hdestroy_r): Likewise.
	(hsearch_r): Likewise.
	(__hcreate_r): Declare and use libc_hidden_proto.
	(__hdestroy_r): Likewise.
	(__hsearch_r): Likewise.
	* misc/hsearch.c (hsearch): Call __hsearch_r instead of hsearch_r.
	(hcreate): Call __hcreate_r instead of hcreate_r.
	(__hdestroy): Call __hdestroy_r instead of hdestroy_r.
	* misc/hsearch_r.c (hcreate_r): Rename to __hcreate_r and define
	as weak alias of __hcreate_r.
	(hdestroy_r): Rename to __hdestroy_r and define as weak alias of
	__hdestroy_r.
	(hsearch_r): Rename to __hsearch_r and define as weak alias of
	__hsearch_r.
	* conform/Makefile (test-xfail-XPG3/search.h/linknamespace):
	Remove variable.
	(test-xfail-XPG4/search.h/linknamespace): Likewise.
	(test-xfail-UNIX98/search.h/linknamespace): Likewise.
	(test-xfail-XOPEN2K/search.h/linknamespace): Likewise.
	(test-xfail-XOPEN2K8/search.h/linknamespace): Likewise.

1 files changed, 6 insertions, 3 deletions

diff --git a/include/search.h b/include/search.h
index cf9c343708..24eafc0f71 100644
--- a/include/search.h
+++ b/include/search.h
@@ -2,9 +2,12 @@
 #include <misc/search.h>
 
 #ifndef _ISOMAC
-libc_hidden_proto (hcreate_r)
-libc_hidden_proto (hdestroy_r)
-libc_hidden_proto (hsearch_r)
+extern __typeof (hcreate_r) __hcreate_r;
+libc_hidden_proto (__hcreate_r)
+extern __typeof (hdestroy_r) __hdestroy_r;
+libc_hidden_proto (__hdestroy_r)
+extern __typeof (hsearch_r) __hsearch_r;
+libc_hidden_proto (__hsearch_r)
 libc_hidden_proto (lfind)
 
 /* Now define the internal interfaces.  */