Use libm_alias_float for s390 [committed]

[Joseph Myers]

Continuing the preparation for additional _FloatN / _FloatNx function
aliases, this patch makes an s390 libm function implementation use
libm_alias_float to define function aliases.

Tested with build-many-glibcs.py for s390-linux-gnu and
s390x-linux-gnu that installed stripped shared libraries are unchanged
by the patch.  Committed.

2017-11-28  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/s390/fpu/s_fmaf.c: Include <libm-alias-float.h>.
	[!__fmaf] (fmaf): Define using libm_alias_float.

diff --git a/sysdeps/s390/fpu/s_fmaf.c b/sysdeps/s390/fpu/s_fmaf.c
index c56cc04..4ad7257 100644
--- a/sysdeps/s390/fpu/s_fmaf.c
+++ b/sysdeps/s390/fpu/s_fmaf.c
@@ -18,6 +18,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <math.h>
+#include <libm-alias-float.h>
 
 float
 __fmaf (float x, float y, float z)
@@ -27,5 +28,5 @@ __fmaf (float x, float y, float z)
   return r;
 }
 #ifndef __fmaf
-weak_alias (__fmaf, fmaf)
+libm_alias_float (__fma, fma)
 #endif

-- 
Joseph S. Myers
joseph@codesourcery.com