Building on android - compiled program segfaults

Conrad Parker conrad at
Sun Jan 13 12:56:44 CET 2013

On 11 January 2013 19:36, Nathan Hüsken <nathan.huesken at> wrote:
> Hi,
> I was succesfull in building ghc (pulled from git) to compile for
> arm-linux-androideabi!
> Now using "inplace/bin/ghc-stage1 -dcore-lint -debug" I compiler this
> Main.hs:
> main = putStrLn "Hello, World"
> I get an executable, which I can run on my android device. Unfortantly
> it segfaults.
> Running it with ./Main +RTS -DS gives:
> cap 0: initialised
> Now I am trying to debug this in gdb. When I try to display the stack
> (which should be in r13 on arm of I understand correctly, I get);
> (gdb) p8 $r13
> 0xbef00a74:     0x0
> 0xbef00a70:     0x0
> 0xbef00a6c:     0x3c2e74
> 0xbef00a68:     0x530350
> 0xbef00a64:     0x0
> 0xbef00a60:     0x0
> 0xbef00a5c:     0x0
> 0xbef00a58:     0x0
> And now I am clueless. So I tried the good old printf debugging in the
> rts. Using this, I see that it gets before the call to
> scheduleWaitThread in the function rts_evalLazyIO (in RtsAPI.c).
> But when I put a printf in the beginning of scheduleWaitThread (in
> Schedule.c) it is not shown.
> What else can I do to find out more?

can you strace it?


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