Date: prev next · Thread: first prev next last
2019 Archives by date, by thread · List index


On Tue, May 07, 2019 at 11:32:12AM +0200, Luboš Luňák wrote:
- We use -MMD, which exludes system headers (or even our externals, since for 
those we use -isystem too). This means that ccache could give incorrect hits 
if those headers change. That may seem bad, but I think it's unlikely to 
cause problems in practice, for several reasons:
 * System headers rarely change.

They change all the time.

 * If they change, it's generally a binary compatible change.

No? There's many versions of the same compatible header where the header
stays the same?

You seem to only think of people only developing on their stable, not
changing distro.

People often build stuff for their distros (as distro packagers, where
this stuff *does* change - and that also compatibly because said new update
affected someting else or a specific header of even the same header but
compatibly.

In development times, I upgrade my unstable chroot daily (and whatever changed
in unstable changes there, too. That includes system libs/headers and compilers
and whatever.)

Regards,

Rene

Context


Privacy Policy | Impressum (Legal Info) | Copyright information: Unless otherwise specified, all text and images on this website are licensed under the Creative Commons Attribution-Share Alike 3.0 License. This does not include the source code of LibreOffice, which is licensed under the Mozilla Public License (MPLv2). "LibreOffice" and "The Document Foundation" are registered trademarks of their corresponding registered owners or are in actual use as trademarks in one or more countries. Their respective logos and icons are also subject to international copyright laws. Use thereof is explained in our trademark policy.