The last reliable gecko builds on macppc were done with:
OpenBSD 5.8-current (GENERIC.MP) #761: Mon Aug 31 08:01:30 MDT 2015
(mpi@ says SecurePLT was commited beginning of Sep, so .. related?)
Thunderbird and firefox-esr strangely built on sparc64 (by accident?) in
may and june (when it was gecko 31) but other than that firefox itself
never built in 2015.
Anybody is welcome to look into this, just add you beloved arch to
ONLY_FOR_ARCHS in mozilla.port.mk.
While here, also amend ONLY_FOR_ARCHS in langpacks ports, no point in
packaging them if you don't have the corresponding package.
Avoids wasting hours during bulks, only keep xulrunner building on
powerpc and sparc64.
a2e34bf9b4