Michael Jones <m...@proclivis.com> writes: > I am having problems building a GHC cross compiler for Linux (Yocto on > a Wandboard) running on a Cortex A9, and need some advice on how to > debug it. > Sorry for the delay, almost overlooked this one!
> The cross compiler produces an executable that runs on the Target, but > fails to print. So I need help coming up with a strategy to narrow > down the root cause. > > Some details: > > The application: > > main = do > putStrLn "Haskell start" > > > The command line options work. The program runs, and I can step > through assembly. Debug data is printed to the console. But putStrLn > fails, and program enters an infinite loop. > Hmmm, very peculiar. I would probably begin by compiling with `-auto-all -caf-all -prof` and run the resulting executable with `+RTS -xc`. SIGINT the process after a second or so and see what the backtrace looks like. While worth trying, this probably won't help too much as your problem is likely RTS-related. You might try stracing the executable and see if it is ever even trying a syscall. Unfortunately, I doubt it is as the program appears to be hitting heap and stack overflows. This is quite perplexing. I'm going to try to reproduce the issue on my end. Cheers, - Ben
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