Make mkdir failsafe in case the directories are already present

diff --git a/util/mk1mf.pl b/util/mk1mf.pl
index 8b6b2e668aeb00b63fd6d904d74efb68b2926cfc..c9271bbffeeb8adb1ab51aa72bcec37d98d28183 100755 (executable)
--- a/util/mk1mf.pl
+++ b/util/mk1mf.pl
@@ -100,7 +100,7 @@ $out_def="out";
 $inc_def="outinc";
 $tmp_def="tmp";
 
-$mkdir="mkdir";
+$mkdir="-mkdir";
 
 ($ssl,$crypto)=("ssl","crypto");
 $ranlib="echo ranlib";