There is an easy way to compile pwscf with xlf in Mac OS X 10.4: Set gcc version to 3.3. This is done with the command
sudo gcc_select 3.3 If you get the message "Error trying to determine current cc version (got )" change the order of directory in you PATH variable in order to make /opt/ibm/... to appear at its end. The xlc alias to cc will stop working, but ass soon you have set gcc version you can change PATH to its normal direcory order. Cesar.
