[nsz/math2, PATCH] e_exp2f.c: Support multiarch

[H.J. Lu]

This is for nsz/math2 branch.
 
This is to support compiling e_exp2f.c more than once for multiarch.

	* sysdeps/ieee754/flt-32/e_exp2f.c [__exp2f] (__ieee754_exp2f,
	__exp2f_finite, exp2f): Skip.
---
 sysdeps/ieee754/flt-32/e_exp2f.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sysdeps/ieee754/flt-32/e_exp2f.c b/sysdeps/ieee754/flt-32/e_exp2f.c
index b53a919a0d..e54a88f692 100644
--- a/sysdeps/ieee754/flt-32/e_exp2f.c
+++ b/sysdeps/ieee754/flt-32/e_exp2f.c
@@ -86,6 +86,9 @@ __exp2f (float x)
   y = y * s;
   return (float) y;
 }
+
+#ifndef __exp2f
 strong_alias (__exp2f, __ieee754_exp2f)
 strong_alias (__exp2f, __exp2f_finite)
 versioned_symbol (libm, __exp2f, exp2f, GLIBC_2_27);
+#endif
-- 
2.13.5