Hi Rutherther,

I ran into the same issue with PHP, and prepared a slightly different
patch, which I have attached. Rather than propagating the inputs, I
reinstated a patch that we used to have, but which got removed in the
core-updates merge.

My assumption is that it was removed because the referenced GitHub issue
was closed, but the issue is not actually resolved upstream. They claim
it's a pkg-config bug (which has been open for 18 years), so I'm not
holding my breath for an upstream fix.

I also noticed the three failing tests, all related to libgd, but ran
out of time to investigate further.

Carlo