Linux PCs with Portland Group compiler (pgf90)

Quantum-ESPRESSO does not work reliably, or not at all, with some versions (in particular, 5.2) of the Portland Group compiler. We think that this is due to compiler bugs, not to Quantum-ESPRESSO bugs. In any event, use the latest version of each release of the compiler, with patches if available: see the Portland Group web site,
http://www.pgroup.com/faq/install.htm#release_info