How to defend "using the right compiler" in upstream projects

[Mojca Miklavec]

Hi,

I need help explaining why it's important to us to use the right
compiler (even when the source is written in plain C and even Tiger
can build the source, so one cannot say that something is really
broken):

https://github.com/FluidSynth/fluidsynth/issues/509
https://github.com/macports/macports-ports/pull/3583

If you think you can explain it, please write the comments directly to
their issue tracker. I kind of ran out if ideas.

Thank you,
    Mojca