[cfe-dev] Getting involved with Clang refactoring

Manuel Klimek klimek at google.com
Thu May 24 08:33:20 PDT 2012

On Thu, May 24, 2012 at 4:11 PM, Arnaud de Grandmaison <
arnaud.allarddegrandmaison at parrot.com> wrote:

> On 05/24/2012 02:28 PM, Manuel Klimek wrote:
> > In the end it depends on who's willing to write which solution and
> > propose a patch to clang ;)
> Do not tempt me ;)
> The use case I have here is that several people are using clang_complete
> + vim, but have to use gcc because their target requires it. We have
> added a cmake target to generate the ".clang_complete" configuration
> file, which provides the options necessary for compiling the source
> files :  in essence, that's a compilation-db. On its side,
> clang_complete also provides a script to extract the compilation options
> from the build system.
> I am interested in working on this compilationdb, as this will clearly
> be a benefit for clang and all derivative projects.

So, there are multiple things to the CompilationDatabase where work is

1. Add ways to create the JSON compilation-db. We already have a way to
create it from CMake, there were discussions on getting it out of ninja,
and even creating one yourself with a python script is not too hard.

2. Integrating the compilation database into libclang, as tools like
clang-complete are libclang based, which currently doesn't expose the
CompilationDatabase interfaces; adding a C interface around
CompilationDatabase would help there.

3. Making CompilationDatabase work in more use cases:
- add code to deal with gcc specific flags, where people have gcc as their
main tool; don't know whether it makes sense to add code to deal with other
- add other formats for the CompilationDatabase, for example for Ninja it
might be viable to basically link in a Ninja runtime (if available at clang
compile time) to directly read the compile commands from the ninja files

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