On Mon, Apr 04, 2016 at 10:28:02AM +0200, Pjotr Prins wrote:
> On Sun, Apr 03, 2016 at 11:39:24PM -0400, Leo Famulari wrote:
> > Debian's package exhibits this problem. The timestamps are generated in
> > the following places in the source code. I don't know how to approach
> > this problem.
> >
> > lib/kernel/test/global_SUITE_data/global_trace.erl: io:format("The trace
> > was generated at ~p~n", [EndTime]),
> > lib/reltool/bin/reltool.escript: lists:flatten(io_lib:format("%% ~s
> > generated at ~w ~w\n~p.\n\n",
> > lib/reltool/src/reltool_server.erl: IoList = io_lib:format("%% config
> > generated at ~w ~w\n~p.\n\n",
> > lib/reltool/src/reltool_target.erl: RelIoList = io_lib:format("%% rel
> > generated at ~w ~w\n~p.\n\n",
> > lib/reltool/src/reltool_target.erl: ScriptIoList = io_lib:format("%%
> > script generated at ~w ~w\n~p.\n\n",
> > lib/reltool/src/reltool_target.erl: AppIoList =
> > io_lib:format("%% app generated at ~w ~w\n~p.\n\n",
> > lib/reltool/src/reltool_target.erl: AppIoList =
> > io_lib:format("%% app generated at ~w ~w\n~p.\n\n",
> > lib/runtime_tools/src/erts_alloc_config.erl: "generated at
> > ~w-~2..0w-~2..0w ~2..0w:~2..0w.~2..0w by "
> > lib/sasl/src/systools_make.erl: io:format(Fd, "%% script generated
> > at ~w ~w\n~p.\n",
> > lib/wx/src/gen/gl.erl:%% The program object's information log is updated
> > and the program is generated at the time
>
> If there is no easy work around I suggest simply patching them. Fortunately
> the Erlang compiler does not change much at this level.
The ideal solution would be to use the value of the environment variable
SOURCE_DATE_EPOCH if it is set, and else to behave as it does now.
> We can also contact Joe Armstrong, the author of Erlang, to discuss
> this point. He appears to be approachable. I am sure he is open to
> the idea of deterministic builds in a deterministic build system ;)
I could go to the Erlang IRC channel or forums (whatever they use) and
ask for advice. Since you are actually using Erlang, I think you would
be the better person to contact Joe Armstrong himself, if we decide to
do that.
