On 2017-10-08 12:17, db wrote: > On 8 Oct 2017, at 01:17, Ryan Schmidt <[email protected]> wrote: >> py-numpy requires a Fortran compiler. Xcode doesn't contain one, so we must >> use one provided by MacPorts. You can choose which compiler to use by using >> variants: > >> For modern systems, the default gcc port that the compilers portgroup uses >> used to be gcc6, and was changed to gcc7 a few days ago: >> https://github.com/macports/macports-ports/commit/c347ac662f932c0db8b15ec982eb4a563174bcfc > > Since py27-numpy is the only port installed requiring gcc7, I rather choose > gcc6 which is used by many others instead. Is there any way to install a port > like scapy, which ultimately depends on py27-numpy built by default by gcc7, > using gcc6 instead, i.e., to pass a variant to a dependency of the port to be > installed? Or, is installing the dependency variant, then setting it to not > requested, next installing the dependent port, the only way?
Selected variants will be passed down to dependencies, if they are not yet installed, even if the port given on the command line does not have such a variant. In your case, assuming py27-numpy is not yet installed, the command sudo port install scapy +gcc6 would install py27-numpy +gcc6 as dependency. Rainer
