js wrote:

ccache really saves so much time, but it is off by default. Assuming this is just because MacPorts installer does not contain ccache, how about adding ccache into the installer and making configurecache on by default? I think this would help many users who don't know about ccache, just like I used to be. If ccache has no bad side-effect, I think it's reasonable to make it enabled always.

I would leave this to the users to configure it. We already have an easy installation howto for it and I think this is enough. Maybe we could announce this howto more by e.g. adding a reference in the FAQ to it. Rainer

Currently enabling ccache sets CC="ccache /usr/bin/gcc-4.0"

Unfortunately some of the ports don't build with that setting, trying to use ccache as the compiler or otherwise not working. Even though it is easy to override with "configure.ccache=no", it's probably a good idea to leave it disabled in the default ?

Also, tracemode doesn't really work with ccache enabled: http://trac.macports.org/projects/macports/ticket/12218

Thanks for the information. Could you add this informatioin to the ccache doc on the FAQ page as a warning? I didn't know that ccache sometimes make build failed.