Make mkdir failsafe in case the directories are already present

diff --git a/util/mk1mf.pl b/util/mk1mf.pl
index 46755fa28705c6a1cba1939bb302401e9cce4246..4cc7881d8d73d49ead7078641cce185d61ff05f1 100755 (executable)
--- a/util/mk1mf.pl
+++ b/util/mk1mf.pl
@@ -98,7 +98,7 @@ $out_def="out";
 $inc_def="outinc";
 $tmp_def="tmp";
 
-$mkdir="mkdir";
+$mkdir="-mkdir";
 
 ($ssl,$crypto)=("ssl","crypto");
 $RSAglue="RSAglue";