ecCodes' gcc9 variant conflicts with gfortran

[thiagoveloso (Thiago V. dos Santos)]

On my system, I usually install cdo with the following variants:

sudo port install cdo +szip +grib_api +gcc9 +mpich

I guess this causes ecCodes to be installed with the gcc9 variant as well.

However, a recent update in version 2.15.0 revision 1 seems to break this. This revision introduces gfortran as default variant: ​https://github.com/macports/macports-ports/commit/6f931aa8f8607e060f40cb1438625b776fb912aa#diff-72f4652e4e50c65421dbd4abc178a477

This is the error message I receive when trying to update:

sudo port upgrade outdated
Error: ecCodes: Variant gcc9 conflicts with gfortran
Error: Unable to open port: Error evaluating variants
Error: Follow https://guide.macports.org/#project.tickets to report a bug.

Any way to work around this error?

[ryandesign (Ryan Carsten Schmidt)]

I guess this causes ecCodes to be installed with the gcc9 variant as well.

Yes, variant selections are passed down to any dependencies that have not yet been installed.

Any way to work around this error?

The workaround is to add -gfortran to your port install line.

Takeshi, the fix is to follow wiki:PortfileRecipes#default_variants (unless the compilers portgroup you're using has a way it to handle default_variants for you; I'm not familiar with the portgroup).

[tenomoto (Takeshi Enomoto)]

In b166f46bf0204efc631ab6ca9af74b778ee0ee9f/macports-ports (master):

ecCodes: avoid build error when one of gcc variants is set

Closes: #59795

[thiagoveloso (Thiago V. dos Santos)]

Thanks Ryan and Takeshi, it works now!

[tenomoto (Takeshi Enomoto)]

In b166f46bf0204efc631ab6ca9af74b778ee0ee9f/macports-ports (dar, master, py38-reproject, revert-6945-rust-1.43.0, wireshark):

ecCodes: avoid build error when one of gcc variants is set

Closes: #59795