$ THEN
$ dflt = dflt - "Socket" ! optional on VMS
$ ENDIF
-$ IF .NOT. use_ithreads THEN dflt = dflt - "threads"
+$ IF .NOT. use_ithreads
+$ THEN
+$ dflt = dflt - "threads/shared"
+$ dflt = dflt - "threads"
+$ ENDIF
$ dflt = F$EDIT(dflt,"TRIM,COMPRESS")
$!
$! Ask for their default list of extensions to build