No longer compatible with libgpiod < 1.6.x

[alejandroclaro]

The documentation states in the requirements that this should be compatible with libgpiod 1.x. However, since version 0.4 it's no longer compatible with libgpiod versions lower than 1.6.0

It would be nice its compatibility could be maintained since LTS versions of many distros, like Ubuntu 20.04, are still shipped with libgpiod 1.4.

If not possible, I recommend updating the documentation and clarify the minimum requirements.

[sombriks]

Hello @alejandroclaro , thank you for reporting this!
I think it is related to what @splitice was warning me about in #25 and indeed, i should add some kind of ifdef or something to make it possible to build node-libgpiod again under older versions -- as long as it is 1.x

[sombriks]

Hello @alejandroclaro when you have a chance, please check if it works again with libgpiod versions prior to 1.5 series.

[alejandroclaro]

Thanks @sombriks !

I will test this today.

[alejandroclaro]

@sombriks looks like everything is good now.

Thanks!