[Haskell-cafe] Prologue junk? - compiling lambdabot:Plugin.Pl.Transform

[Ian Lynagh]

On Mon, Mar 26, 2007 at 05:29:39PM +0100, Iain Alexander wrote:
> I'm trying to build lambdabot 4.0 with ghc-6.4.1 (gcc (GCC) 3.4.2 (mingw-
> special)) and Cabal-1.1.6.1 on WinXP SP2.  I've got as far as 
> Plugin.Pl.Transform.hs, and I get
> 
> *** Mangler
> g:\ghc\ghc-6.4.1\perl g:\ghc\ghc-6.4.1\ghc-asm 
> C:\DOCUME~1\IAINAL~1\LOCALS~1\Tem
> p\ghc2736.raw_s C:\DOCUME~1\IAINAL~1\LOCALS~1\Temp\ghc2736.s 4
> Prologue junk?: _s7f7_ret:
>         xorl    %ecx, %ecx
>         xorl    %eax, %eax
>         movl    %ecx, 8(%esp)
>         movl    %eax, 12(%esp)
> /APP
> 
> Transform.hs uses
> {-# OPTIONS -fvia-C -O2 -optc-O3 #-}

The mangler probably isn't expecting the sort of output gcc -O3
generates on Windows. I don't think we do any testing at that level of
gcc optimisation.

I'd recommend just using -O2, or lower if necessary, instead.


Thanks
Ian