flatpak-builder, /app and dependent build

[Alec Leamas]

Dear list,

Once again the flatpak world makes me feel silly :(

Have a simple app with a dependency (libgeotiff) which depends on
another module named proj (sic!). Both have a standard autotools setup.

Building proj is fine, but when it tries to install into /app/lib it
runs into a read-only filesystem error. So I give it an
--prefix=/app/extensions option, and it installs happily.

I then try to build libgeotiff. This one needs to find the proj library,
but this fails in configure. There is a specific option --with-proj
which I am using to point it to /app/extensions, but to no avail.

This works just fine in a regular environment, so my impression is that
the sandbox is my problem (?)

Any hint, out there?


--alec

PS: More or less updated manifest:
https://github.com/leamas/photolayer_pi/blob/master/flatpak/org.opencpn.OpenCPN.Plugin.photolayer.yaml