state of scons support (gpsd update)?

[Greg Troxel <gdt%lexort.com@localhost>]

I'm trying to update gpsd to 3.18, which is long overdue.  It uses
scons, which I'm not used to dealing with.

It seems we do not have USE_SCONS or similar support.  Many packages
seem to open-code invoking scons in the build phase, passing the
MAKE_ENV.

I tried copying the typical open-coding, but get build failures.
Somehow, part of the build environment (cwrappers config variable) is
going missing, and causing compiler invocations to fail.

If anyone can explain the standard approach for scons (or better yet put
it in the guide and tell me to read it!), I'd appreciate it.

My not-working gpsd package is in wip.