add host check for cygwin to force the OBJ_FORMAT
diff --git a/configure.in b/configure.in
index 28382e8..603d6ca 100644
--- a/configure.in
+++ b/configure.in
@@ -52,6 +52,7 @@
 AM_CONDITIONAL(FLaC__CPU_SPARC, test x$cpu_sparc = xtrue)
 case "$host" in
 	i386-*-openbsd3.[[0-3]]) OBJ_FORMAT=aoutb ;;
+	*-*-cygwin) OBJ_FORMAT=win32 ;;
 	*) OBJ_FORMAT=elf ;;
 esac
 AC_SUBST(OBJ_FORMAT)