On 03 January 2005 15:19, Peter Simons wrote:

I wrote:

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Simon Marlow writes:

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Please compile the program with -debug, then open it with gdb.

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Unfortunately, -debug seems to conflict with -threaded:

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ghc --make -threaded -debug -O -Wall [...] -o postmaster tutorial.lhs [...] > Chasing modules from: tutorial.lhs [...] Compiling Main ( tutorial.lhs, .objs/Main.o ) Linking ... /usr/lib/gcc-lib/i686-pc-linux-gnu/bin/ld: cannot find -lHSrts_thr_debug > collect2: ld returned 1 exit status

It has been a while since this problem came up, and I was wondering what to do now, because the software keeps crashing (or freezing) every few days.

Any advice, anyone?

If your program still works without -threaded, then that's an option. Otherwise, you'll need to compile up a local copy of the debug/threaded RTS so you can use -debug and -threaded together. The way to do that is to add "GhcRtsWays += thr_debug" to mk/build.mk in a GHC tree, and build as normal. You can then either use this GHC to build your app, or just use the thr_debug version of the RTS with your existing GHC installation by giving the appropriate -L option when linking (it better be the same GHC version, of course). Cheers, Simon