[Qt-creator] Clang Model plugin interface

[Nikolai Kosjar]

On 12/15/2017 05:11 PM, Antonio Di Monaco wrote:
> Hi,
> 
> I'm writing a Qt Creator plugin to support our own custom build process.
> 
> My issue is that I cannot find a way to interact with the Clang Code 
> Model plugin, in order to pass to it specific compile options (in my 
> case, it's --gcc-toolchain).
> 
> In detail, my plugin automates the kit creation, in order to find out 
> the custom compiler, debugger, and all other stuff we need to build, 
> including our build tool. I'm populating the CppTools::RawProjectsParts 
> data structure according
> to the specific toolchain that has been selected by the user (that could 
> be a Clang, GCC or MSVC compiler), and everything works fine, as long as 
> I work with the built-in C++ Code Model.
> 
> When I activate the Clang Code Model and GCC profile is activated, as 
> the same CppTools::RawProjectsParts data is accessed (is it true or did 
> I miss something?), I encounter a failure, cause if I add the 
> "--gcc-toolchain" parameter, Clang model works, but the built-in fails. 
> And if not, of course the opposite happens, and I'd like to have both 
> running.
> 
> I'd like just to interact with the Clang Code Model at "run-time" and, 
> behind the scene, add my mandatory options to it, without asking the 
> user for a UI settings change (also cause the path passed to the 
> "gcc-toolchain" parameter changes according to the profile selected by 
> the user).
> 
> My question is: is there an interface, or anything similar, that I can 
> use in order to add such parameters to clang model only? I could also 
> change the Qt Creator code, but I'd like to go for the clean way, if 
> there's any.
> 
> Thanks for your help!
> A.

Hi!

There is no interface for this right now. All the information for the 
libclang command line come from the RawProjectsParts and the diagnostic 
options the user has configured. Currently, no concrete options are 
forwardable directly with RawProjectsPart because libclang might now 
understand them, depending on your toolchain....

There is CppModelManager::updateCompilerCallDataForProject(), which 
basically allows to set a command line, but it's used for the clang 
static analyzer plugin (not the clang code model) and the qbs project 
only so far.

I suggest that you modify the Qt Creator code to suit your needs and 
then push it for review.

Nikolai