Re: Project out of sources compilation

[Konstantin Kharlamov]

On Sat, 2024-03-16 at 20:00 +0100, Ergus wrote:
> Hi:
> 
> On Sat, Mar 16, 2024 at 07:50:49PM +0300, Konstantin Kharlamov wrote:
> > On Sat, 2024-03-16 at 14:12 +0100, Ergus wrote:
> > > 2. Eglot compilations database place.
> > > 
> > > When compilation is out of sources the cmake generated
> > > compile_commands.json also goes in that directory by default.
> > > 
> > > This issue can be managed with a line in dir-locals, or just
> > > manually
> > > coping the database.
> > > 
> > > ((eglot-workspace-configuration
> > >   � . (:clangd (:initializationOptions
> > > (:compilationDatabasePath
> > >   � "build")))))
> > 
> > Just wanted to clarify two things:
> > 
> > 1. You can't just copy clangd database (i.e.
> > `compile_commands.json`)
> > because the field "directory" has absolute path and clangd doesn't
> > support relative one. So you'll also have to regexp-replace the
> > paths
> > after it's been copied.
> 
> Yes, I know that (now). But that is actually the most popular
> solution in:
> 
> https://emacs.stackexchange.com/questions/73922/how-do-you-tell-eglot-and-clangd-about-the-compilation-database-compile-command

Actually, I stand corrected. I certainly remember that way not working
≈2 years ago (last time I tried and learned all that information);
however right now creating a symlink to `compile_commands.json` as well
as just copying does work.

I just tested that on a C project at work by symlinking/copying the
json file, then starting lsp and trying to "goto definition" to a
generated `.h` file that resides in the build dir. It works. I tested
that both with dir called `build` and `build-docs` (in the latter case
`build` dir was absent to make sure).

clangd version 16.0.6