On Sat, 18 Mar 2017, Junio C Hamano wrote:

> Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
>
>> There might be some way I haven't thought of, in particular maybe you
>> can use gitattributes to define a custom diff/merge driver that always
>> reports no changes, or some ways to (ab)use the index to make git
>> ignore any changes to the file.
>
> Why does this have to be so difficult?
>
> Ship a config.h.sample file, have a Makefile rule that is forced to
> run before any compilation happens that checks if config.h exists
> and then created it if missing by copying config.h.sample over, and
> then all other source files can include config.h without having to
> know anything about config.h.sample's existence.
>
> Did I miss something?

There is no makefile with the arduino IDE/build system :-(

David Lang