rewrite powf stuff a bit.

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2718

include/cross.h

@@ -16,11 +16,15 @@
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
-/* $Id: cross.h,v 1.16 2006-02-09 11:47:47 qbix79 Exp $ */
+/* $Id: cross.h,v 1.17 2006-11-07 11:43:12 qbix79 Exp $ */
 
 #ifndef DOSBOX_CROSS_H
 #define DOSBOX_CROSS_H
 
+#ifndef DOSBOX_DOSBOX_H
+#include "dosbox.h"
+#endif
+
 #include <stdio.h>
 #include <sys/stat.h>
 #include <sys/types.h>
@@ -56,4 +60,10 @@
 #define ftruncate(blah,blah2) chsize(blah,blah2)
 #endif
 
+//Solaris maybe others
+#if defined (DB_HAVE_NO_POWF)
+#include <math.h>
+static inline float powf (float x, float y) { return (float) pow (x,y); }
+#endif
+
 #endif