[urbit] Contributor guidelines - feedback requested

[Raymond Pasco]

https://github.com/urbit/urbit/blob/master/CONTRIBUTING.md

[John Franklin]

I created a branch with notes on building for gdb.

https://github.com/urbit/urbit/compare/test...jfranklin9000:debug-with-gdb

Comments welcome.

Post by Raymond Pasco
https://github.com/urbit/urbit/blob/master/CONTRIBUTING.md

[Raymond Pasco]

Notes on how to get a stack trace out of a core would be more useful, I
think, and for both gdb and lldb, but it's a start. Makefile upgrades much
appreciated, but shouldn't that be `=` be a `?=`?

Yours,
r

[John Franklin]

For `make DEBUG=yes`?

I tried both ways and they seem to do the same thing.

I followed this page which uses `=`:
http://www.gnu.org/software/make/manual/make.html#Overriding

Post by Raymond Pasco
Notes on how to get a stack trace out of a core would be more useful, I
think, and for both gdb and lldb, but it's a start. Makefile upgrades much
appreciated, but shouldn't that be `=` be a `?=`?
Yours,
r

[Raymond Pasco]

Rebased and merged into master and test. I'll generalize it later, unless
someone else does it for me.

Yours,
r