Muli Ben-Yehuda <[EMAIL PROTECTED]> writes: > On Fri, Sep 27, 2002 at 07:42:46PM +0300, Nadav Har'El wrote: > > > You guys got me curious. What is that ccache? What does it cache? Is it > > free software? > > compiler cache. It caches intermediate object files, so that they > don't need to be recompiled if you do the equivalent of 'make mrproper > && make' while only changing one file.
This seems to me somehow slippery - it tries to think for the developer. If I do make clean|mrproper|dist etc I usually *want* to recompile everything. It shouldn't say, in effect, "No, surely you didn't mean that". The above does not mean that I am arguing that it is not a useful tool. See also remarks below. > > http://ccache.samba.org/ > > It's GPL'd, and as I said, I have never seen it miscompile. Also, > check out distcc, http://distcc.samba.org/. Work to integrate distcc > and ccache is underway, AFAIK. I have never used it (ccache that is , I know nothing at all about distcc), so I am not really qualified to discuss it (I think I have a general understanding of how it works though), but I am a bit concerned about the possibility that it may thwart make's dependency tracking in some way when included files are deeply nested, some files are generated, and yet others are not in C (and I've been in situations like this quite often in my previous incarn^H^H^H^H^H^Hjobs). Basically, it competes with make for dependency tracking. It seems to try to do it in a smart way, but having two tools trying to outsmart each other seeds doubt in my mind. This doubt may have no foundation whatsoever, just unsubstantiated gut feeling. Also, how good is it for things other than kernel compilation? In very large projects (and for small ones it is not worth the trouble, I guess) it is often the case that the bulk of the build time is taken by preprocessor and linker, not the compilation. It is my understanding that ccache does not affect either preprocessing or linking, only compilation of preprocessed files. Can someone with experience with ccache comment on the above? I will be grateful. -- Oleg Goldshmidt | [EMAIL PROTECTED] ================================================================= "... Of theoretical physics and programming, programming embodied the greater intellectual challenge." [E.W.Dijkstra, 1930 - 2002.] ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
