Alias scalbnf as ldexpf. The two are identical in binary

floating-point formats.

lib/msun/i387/s_scalbnf.S

@@ -14,3 +14,6 @@ ENTRY(scalbnf)
 	fscale
 	fstp	%st(1)		/* bug fix for fp stack overflow */
 	ret
+
+.globl CNAME(ldexpf)
+.set	CNAME(ldexpf),CNAME(scalbnf)

lib/msun/src/s_scalbnf.c

@@ -17,6 +17,8 @@
 static char rcsid[] = "$FreeBSD$";
 #endif
 
+#include <sys/cdefs.h>
+
 #include "math.h"
 #include "math_private.h"
 
@@ -52,3 +54,5 @@ scalbnf (float x, int n)
 	SET_FLOAT_WORD(x,(ix&0x807fffff)|(k<<23));
         return x*twom25;
 }
+
+__strong_reference(scalbnf, ldexpf);