Okay, thanks for the explanation. But that does not completely answer the original question: now, using branch 7 of GHC what can you do to get a haskell program compiled on/for an ARM platform without using Debian? You have to use LLVM? So you have to compile your program on a regular x86/x64 PC for LLVM backend and then use that bytecode on your ARM platform, is that it? Is LLVM bytecode that portable? I don't much about LLVM, so sorry if those questions feel a bit dumb ;) ghcarm speaks about the Pandaboard and LLVM in a post: http://ghcarm.wordpress.com/2011/07/03/llvm-on-arm-testing
And thanks for the information about git-annex, I'm checking that out, it looks interesting ;) Actually, bottomline I would be interested in running a web app (preferably using Yesod) on a Raspberry Pi (or similar, but more expensive), but this use case is cool too. Le 10 avril 2012 13:13, Joachim Breitner <m...@joachim-breitner.de> a écrit : > Hi, > > Am Dienstag, den 10.04.2012, 13:04 +0200 schrieb Yves Parès: > > > All these are not cross-compiled, but natively > > > compiled on the repective architecture, and I don’t think it is > > easily > > > possible to cross-compile GHC itself even today. > > > > So how did they get compiled the first time? How do you get a GHC > > working on or for an ARM platform if you don't use Debian? > > And why was Joey Hess talking about performance issues? > > (I'll be eventually interested, as Graham Klyne suggested earlier, in > > compiling for Raspberry Pi, if the hardware suits). > > well, GHC was more portable in version 6.8 and before (this is not > cross-compiling, at least not really: > http://hackage.haskell.org/trac/ghc/wiki/Building/Porting > > When I ported GHC to s390x half a year ago, I think I started with > porting 6.8 and then kept building the next released version with the > previous. It would be great, though, if porting current versions > directly would become possible again. > > Most of these architectures do not have a native code generator (so they > are compiled via C) and are unregisterized, i.e. GHC knows nothing about > their registers. Both cause a performance penalty; I don’t know numbers. > I assume this is what Joey refers to. But maybe also that ARM machines > tend to be slower :-) > > I’m happily running git-annex on a NSLU2 (266MHz/23MB RAM ARM NAS > device) and have done so before it was registerized, so it is definitely > a useful target for Haskell. > > Greetings, > Joachim > > -- > Joachim Breitner > e-Mail: m...@joachim-breitner.de > Homepage: http://www.joachim-breitner.de > Jabber-ID: nome...@joachim-breitner.de > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
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