Add wrapper for other functions (used by sox)

git-svn-id: svn://svn.openwrt.org/openwrt/packages@5381 3c298f89-4303-0410-b956-a3cf2f4a3e73

libs/libnotimpl/src/math.c

@@ -66,3 +66,33 @@
 	return (float) rint( (double)x );
 }
 
+/* logf for uClibc
+ * 
+ * wrapper for logf(x)
+ */
+
+#ifdef __STDC__
+	float logf(float x)
+#else
+	float logf(x)
+	float x;
+#endif
+{
+	return (float) logf( (double)x );
+}
+
+/* expf for uClibc
+ *
+ * wrapper for expf(x)
+ */
+
+#ifdef __STDC__
+    float expf(float x)
+#else
+    float expf(x)
+    float x;
+#endif
+{
+    return (float) expf( (double)x );
+}
+