Re: [gtkmm] precompiled headers [revisited]

[Christer Palm <palm nogui se>]

Cumming External comneon com wrote:
> > but I still think 
> > it'd be rather interesting to have a build target for 
> > gtkmm.h.pch in the 
> > standard gtkmm makefile.
>
>
> Probably, yes. A patch would be welcome.

After further investigation it turns out that this is not a very good 
idea. In order for precompiled headers to work, the including compiler 
need to be the exact same version, have the same configuration and in 
some cases even have the same compiler options as the compiler used to 
build the precompiled header file.

This means that it's preferred to let the applications build their own 
private precompiled gtkmm.h tailored to the specific compiler 
environment used by the application.

An example showing how an application would do that would be easy to 
cook up, though.

One small problem; the existing gtkmm examples are an integrated part of 
the gtkmm build. To be useful, I think such an example should have its 
own independent build environment (i.e. have its own 
configure.ac/configure.in, etc.). OTOH, I think this will be very useful 
in other respects as well. Perhaps we should provide a generic "build" 
example that shows how to properly set up the GNU autotools, etc. in 
addition to showing how to use a precompiled gtkmm.h?

--
Christer Palm