On Mon, Jan 8, 2018 at 4:07 PM, Tim van Deurzen <t...@kompiler.org> wrote: > I've been spending some time the past few weeks implementing p0515r2, > i.e. the proposal for consistent comparisons for C++ (aka the spaceship > operator).
Great! > I've received some very valuable help on the IRC channel, but > I'm still a little bit stuck. Note, I'm completely new to the GCC > codebase and am very much still getting oriented. > > Following advice from some of the people in IRC channel I implemented > parsing the new token in libcpp and I seem to be successfully parsing it > and creating a new AST node. As this feature is not in the C++ standard > yet, I wanted to add a command line flag to enable usage of the new > operator and ignoring it otherwise. I managed to get cc1plus to accept > the parameter, but it seems that when I invoke my own g++ binary with > that parameter, it complains about unknown parameters. > > I'm perfectly happy to dig further on my own, but I get the feeling I'm > missing some documentation / resource somewhere that might help me out. > Is there some documentation about adding and passing around parameters > that will be used both in libcpp and the C++ front-end? What would be > the best place to look to learn more about how part of GCC this is > structured? I want to make sure I go about this correctly. There's a gccint.info documentation file, the Options node seems like what you're looking for. You will want to add a new option to c-family/c.opt. > If this is the wrong place to ask for help, please redirect me, so that > I don't unnecessarily spam the wrong mailing list :-). I'm not sure whether gcc@ or gcc-patches@ is better for this sort of question (without a patch). I tend to miss a lot that goes by on the mailing list, so CCing me directly about C++ changes is also helpful. Jason
