[Qbs] How to set GCC optimization -O3 in releasebuilds?

[Christian Kandeler]

On Fri, 1 Dec 2017 12:12:16 +0100
Ola Røer Thorsen <ola at silentwings.no> wrote:

> 2017-12-01 10:03 GMT+01:00 Christian Kandeler <christian.kandeler at qt.io>:
> > Inheritance is one possibility. Another one is a project-specific module.
> > For instance:
> >
> > // <project dir>/modules/myprojectsettings/myprojectsettings.qbs
> > Module {
> >     // ...
> >     Properties {
> >         condition: qbs.buildVariant === "release" &&
> > qbs.toolchain.contains("gcc")
> >         cpp.cxxFlags: ["-ffast-math", "-O3"]
> >     }
> > }
> >
> > // someproduct.qbs
> > Product {
> >     // ...
> >     Depends { name: "myprojectsettings" }
> > }
> >
> >  
> I quite like the module-solution. I'll have to include the Depends-item in
> every product file, right?

Yes, but you can combine this with inheritance and add the dependency in the base item. The advantage to a purely inheritance-based approach is that you can have different base items that share these settings without duplication (except for the dependency on the module). 


Christian