[BZ #6803] Set errno for scalbln, scalbn

Errno is not set and the testcases will fail.

Now the scalbln-aliases are removed in i386/m68
and the wrappers are used when calling the scalbln-functions.

On ia64 only scalblnf has its own implementation.
For scalbln and scalblnl the ieee754/dbl-64 and ieee754/ldbl-96 are used, thus
the wrappers are needed, too.

2 files changed, 23 insertions, 1 deletions

diff --git a/sysdeps/ieee754/ldbl-128ibm/s_scalblnl.c b/sysdeps/ieee754/ldbl-128ibm/s_scalblnl.c
index 03d4597..0316352 100644
--- a/sysdeps/ieee754/ldbl-128ibm/s_scalblnl.c
+++ b/sysdeps/ieee754/ldbl-128ibm/s_scalblnl.c
@@ -102,4 +102,3 @@ long double __scalblnl (long double x, long int n)
 	x = ldbl_pack (xhi, xlo);
 	return x*twolm54;
 }
-long_double_symbol (libm, __scalblnl, scalblnl);
diff --git a/sysdeps/ieee754/ldbl-128ibm/w_scalblnl.c b/sysdeps/ieee754/ldbl-128ibm/w_scalblnl.c
new file mode 100644
index 0000000..24a5461
--- /dev/null
+++ b/sysdeps/ieee754/ldbl-128ibm/w_scalblnl.c
@@ -0,0 +1,23 @@
+/* Wrapper for __scalblnl handles setting errno.
+   Copyright (C) 2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math_ldbl_opt.h>
+#undef weak_alias
+#define weak_alias(name, alias)
+#include <math/w_scalblnl.c>
+long_double_symbol (libm, __w_scalblnl, scalblnl);