+open (CVSIGNORE, ">.cvsignore");
+print CVSIGNORE <<EOF;
+# Automatically generated by mkmf - do not modify!
+*.d
+*.dsk
+*.o
+bochsrc.txt
+bochsout.txt
+child-arg
+child-bad
+child-close
+child-simple
+EOF
+print CVSIGNORE join ("\n", @tests), "\n";
+close (CVSIGNORE);