add api_versionstring to archname

gistfile1.diff

diff --git a/Configure b/Configure
index 793f8fa..632f740 100755
--- a/Configure
+++ b/Configure
@@ -6068,6 +6068,14 @@ esac
 rp='What is your architecture name'
 . ./myread
 archname="$ans"
+: append the api_versionstring to support INSTALL_BASE with multiple perls
+case "$archname" in
+   *-$api_versionstring) echo "...and architecture name already has -$api_versionstring" >&4
+       ;;
+   *)  archname="$archname-$api_versionstring"
+                echo "...setting architecture name to $archname." >&4
+                ;;
+esac
 case "$usethreads" in
 $define)
    echo "Threads selected." >&4