Fix linknamespace h_errno handling.

Some linknamespace tests were failing because of references to
h_errno.  References to this symbol should be allowed for XPG4, UNIX98
and XOPEN2K; this patch adds it to the list of allowed data symbols
for those standards.  (h_errno was removed in the 2008 edition of
POSIX, so POSIX2008 and XOPEN2K8 references to it are genuine bugs;
fortunately it's not a public data symbol - __h_errno_location is
public, TLS h_errno is GLIBC_PRIVATE - so the symbol can simply be
renamed to __h_errno to fix those bugs without the ABI complications
normally associated with namespace issues for data symbols.)

Tested for x86_64.

	* conform/list-header-symbols.pl (%extra_syms): Add h_errno for
	XPG4, UNIX98 and XOPEN2K.
	* conform/Makefile (test-xfail-XOPEN2K/grp.h/linknamespace):
	Remove variable.
	(test-xfail-XOPEN2K/pwd.h/linknamespace): Likewise.

1 files changed, 4 insertions, 3 deletions

diff --git a/conform/list-header-symbols.pl b/conform/list-header-symbols.pl
index 7d15a1b64c..bc2042946d 100644
--- a/conform/list-header-symbols.pl
+++ b/conform/list-header-symbols.pl
@@ -47,14 +47,15 @@ $extra_syms{"XPG3"} = ["errno", "setjmp", "va_end", "environ", "signgam",
 $extra_syms{"XPG4"} = ["errno", "setjmp", "va_end", "environ", "signgam",
 		       "loc1", "loc2", "locs", "sigsetjmp", "optarg",
 		       "optind", "opterr", "optopt", "daylight", "timezone",
-		       "tzname", "getdate_err"];
+		       "tzname", "getdate_err", "h_errno"];
 $extra_syms{"UNIX98"} = ["errno", "setjmp", "va_end", "environ", "signgam",
 			 "loc1", "loc2", "locs", "sigsetjmp", "optarg",
 			 "optind", "opterr", "optopt", "daylight", "timezone",
-			 "tzname", "getdate_err"];
+			 "tzname", "getdate_err", "h_errno"];
 $extra_syms{"XOPEN2K"} = ["errno", "setjmp", "va_end", "environ", "signgam",
 			  "sigsetjmp", "optarg", "optind", "opterr", "optopt",
-			  "daylight", "timezone", "tzname", "getdate_err"];
+			  "daylight", "timezone", "tzname", "getdate_err",
+			  "h_errno"];
 $extra_syms{"XOPEN2K8"} = ["errno", "setjmp", "va_end", "environ", "signgam",
 			   "sigsetjmp", "optarg", "optind", "opterr", "optopt",
 			   "daylight", "timezone", "tzname", "getdate_err"];