* James Turner -- Tuesday 18 April 2006 00:07: > On 17 Apr 2006, at 21:31, Melchior FRANZ wrote: > > The really bad news: > > Some of the necessary changes would have to be done in an > > associated project, [...] > > What kind of changes?
Not that many. It's JSBSim and it is a bit too generous with including headers. Took me a while to remove a few and replace others with forward declarations. The problem is maintenance. If the developers aren't interested, then it only takes a few weeks until someone adds stuff that breaks compilation again, without noticing. That's not maintainable that way. > The biggest win for FG would probably come from pre-compiling the > headers for PLIB and parts of SimGear, I guess. I didn't observe a big drop in compile time. Maybe (or hopefully) it's faster than without, but it was definitely slower than with ccache, so it doesn't justify the hassle. (Maybe it's because ccache doesn't understand *.hxx.gch files?) > I'm surprised the code changes are so dramatic than you can't check > them in and let people experiment They aren't dramatic. Some of them are recommendable in any case. It's just the resistance from the audience, the fear that fgfs might compile a few seconds longer if the dirty micro-optimization compile-time hacks are removed. It's hardly more than that. ccache *easily* compensates for the few extra seconds. By the way: several subdirs could be compiled without a single change: UIUC, YASim, LaRCSim, Scripting, Sounds, and a few others. Even Instrumentation could be compiled right away, with the only exception of wxradar.hxx! > - MSVC has good pre-compiled header support, That's another thing why we aren't ready for precompiled headers: our autotools setup doesn't support it yet (although this would probably be easy to add). I'm using scons for SimGear and FlightGear, and here it was only one added 'tool' to get gch support. m. ------------------------------------------------------- This SF.Net email is sponsored by xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=110944&bid=241720&dat=121642 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
