updated for version 7.4.030
Problem:    The -mno-cygwin argument is no longer supported by Cygwin.
Solution:   Remove the arguments. (Steve Hall)
diff --git a/src/xxd/Make_cyg.mak b/src/xxd/Make_cyg.mak
index ba74b18..4f344f0 100644
--- a/src/xxd/Make_cyg.mak
+++ b/src/xxd/Make_cyg.mak
@@ -8,7 +8,7 @@
 DEFINES =
 LIBS    = -lc
 else
-DEFINES = -mno-cygwin
+DEFINES =
 LIBS    =
 endif