On Jul 12, 2010, at 16:47, Frank J. R. Hanstick wrote:

>       When trying to upgrade via
> 
>               sudo port upgrade installed
> 
> erlang causes the upgrading to cease when failing to build.  Erlang is not 
> installed (as recommended from the ticket); but, attempts are continuously 
> made to install resulting in a failure to upgrade the entire installed list.  
> Under the current structure, it seems impossible to determine which port 
> requires erlang (no list of dependencies provided at the beginning of each 
> upgrade or installation in the debug listing).  Is there a way to get a 
> dependency tree for installed ports?

There's the "port rdeps" command, or if you'd like it graphically, the 
"port_depgraph" script:

http://trac.macports.org/browser/contrib/port-depgraph

You could also post (or attach to a ticket) the failed erlang build log.

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