On Sat, Sep 15, 2007 at 09:49:56PM -0700, Gregory Propf wrote: > I've built a program with the -threaded option using ghc. This option is > supposed to link your program to the threaded runtime with support for > multicore CPUS (mine is a dual core). The program pukes with the message in > the subject line when I try to use the -N option to tell it to use both CPUs. > I'm reasonably sure that I actually have the threaded runtime because > initially I got a runtime message from the program about how GTK is single > threaded and can only be used with the threaded runtime using > runtimeunsafeInitGUIForThreadedRTS instead of the standard initGUI. I made > the change in the code and now the program runs but still does not know the > -N RTS option. This problem seems to affect all my programs. It is as if > the threaded runtime is there but doesn't know any of its special flags. > This is the line I'm compiling the program with. It's a life game clone in > case you're curious. Compiler is ghc-6.4.2 on 64 bit AMD dual core running > Gentoo > Linux. - Greg > > > ghc -threaded -package gtk -package glade -o hlife hlgtk.o Hlife.o
-Nx is new in 6.6.0 from http://haskell.org/ghc/docs/6.6/html/users_guide/release-6-6.html: -------------------------------------------------------------------------- 1.4. Release notes for version 6.6 1.4.1. User-visible compiler changes o GHC now supports SMP: when you compile with -threaded, you now get an RTS flag -N that allows you to specify the number of OS threads that GHC should use. Defaults to 1. See [7]Section 4.12, "Using SMP parallelism" and [8]Section 7.15, "Parallel Haskell".a Stefan
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