Adding slang support to edalize

[tianrui-wei]

slang offers system verilog language services and is capable of many things. In particular, a complete Systemverilog preprocessor and linter. This commit adds slang support to edalize

[mithro]

+1

[tianrui-wei]

Another thing I have in mind for this is that it adds some sort of export ip functionality, where you can specify some file sets and slang could output a single clean file instead with no includes attached. This makes it easy to integrate fusesoc into flows that requires unsupported tools.

[olofk]

Thanks @tianrui-wei This is great. Just wanted to let you know that I'm a bit short on time right now and have other things I need to review first

[tianrui-wei]

No problem @olofk :P Happy to wait until you can spare some time.

[tianrui-wei]

Hi @olofk , I rebased my branch, did some cleanup and added some new features in the last few days, could you perhaps take another look?

[tianrui-wei]

ping @olofk

[tianrui-wei]

ping @olofk

[Jbalkind]

@olofk could you take a look at this? We would really like it to land for some openpiton stuff we're doing

[olofk]

This looks find. Thank you for the work and apologies for taking so long. I also want to mention that we are moving to a new API called the flow API and it would be great to have a tool class for the new API as well, but let's start with this

[tianrui-wei]

Thanks Olof, let me know if you need me to submit another PR for the new API

[olofk]

Yes. That would be great. I think slang support makes a lot more sense with the new API also, because then we can use it as a frontend. Unfortunately, the flow API is not yet enabled in FuseSoC, so if you are using FuseSoC I recommend we wait until FuseSoC 2.0 is released. I'm just releasing a first release candidate for it now so hopefully shouldn't be too long.