Support a "first version wins" semantics.

diff --git a/scripts/perl.prov b/scripts/perl.prov
index 400cb19..a6d8856 100755 (executable)
--- a/scripts/perl.prov
+++ b/scripts/perl.prov
@@ -170,7 +170,7 @@ sub process_file {
 
         $version = $1;
       }
-      $require{$package} = $version;
+      $require{$package} ||= $version;
     }
 
     # Allow someone to have a variable that defines virtual packages