Re: Emacs contributions, C and Lisp

[Dmitry Gutov]

On 24.02.2014 19:33, Richard Stallman wrote:
> The lookup and completion features that people want can be implemented
> by making GCC answer questions sent to it, as Aspell does for M-$.
> That change would be welcome.  I think it could be implemented using
> GCC's existing plug-in mechanism, but it would be better to put
> the code into GCC itself.

Could it support a "daemon" mode?

The current situation in Clang is, its executable only supports the 
simplest mode of operation: one process call per completion. This way, 
it has to parse all relevant files (headers, etc) each time completion 
is requested.

But the completion information is available via libclang, and there are 
a few projects that build on it to spin up a persistent server, which 
only processes different files anew when they've changed since the last 
time (or at least that's the intention). These projects also support 
different build systems and extract the necessary dependency 
information, include paths, etc.

I don't really see GCC itself doing that (at least, the last part).
It would require quite a bit of work that might be better left to 
third-party developers.