[Development] headersclean configure option

[Thiago Macieira]

On Tuesday, 5 May 2020 01:58:41 PDT Lars Knoll wrote:
> Hi all,
> 
> Just something I keep stumbling over all the time: When you build Qt (at
> least as a developer-build), headersclean is enabled by default, adding
> ~40% to my build time locally. I usually try to disable it because of that,
> but keep forgetting about it.
 
> Wouldn’t it make more sense to disable the flag by default (speeding up
> compiles for all our developers and users), but have a CI configuration
> that has it enabled so we don’t regress?

It's probably not worth a change in Qt 5.15 anymore. But for Qt 6 and the new 
buildsystem, we can relearn.

Please make sure that it's enabled in the CI, though.
-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel System Software Products