> I'm not sure if the following is harmless or not: Under some rare
> circumstances I get warnings of the following form:
>
> marutea examples/misc> ghc
> -i/home/inst/panne/forschung/haskell/HOpenGL/lib
> -I/home/inst/panne/forschung/haskell/HOpenGL/lib -syslib
> posix -fglasgow-exts -recomp -Wall -O -c BspTree.hs -keep-hc-file-too
> ghc: module version changed to 2; reason: usages changed
> /tmp/ghc15974.hc:9889: warning: decimal constant is so
> large that it is unsigned
> /tmp/ghc15974.hc:9906: warning: decimal constant is so
> large that it is unsigned
>
> The following two lines from the .hc file provoke the above warnings:
>
>
> INFO_TABLE_SRT_BITMAP(c7b7_info,c7b7_ret,-2147483648,BspTree_z
> dwreadBspTree_srt,31,42,RET_SMALL,static ,IF_,0,0);
>
> INFO_TABLE_SRT_BITMAP(c7b6_info,c7b6_ret,-2147483648,BspTree_z
> dwreadBspTree_srt,31,43,RET_SMALL,static ,IF_,0,0);
>
> -2147483648 doesn't seem to be a nice value for an StgWord32... :-}
It's a perfectly reasonable value for an StgWord32, but gcc is following the
letter of the ANSI C spec here and refusing to accept it just in case the
target architecture is using one's complement instead of two's complement
(yeah, right :).
The fix in general is to code this constant as -2147483647-1. Check your
/usr/include/limits.h, you'll probably see the same trick.
Could you try the patch below and see if that fixes it? Cheers.
*** PprAbsC.lhs 1999/07/14 14:40:21 1.39
--- PprAbsC.lhs 1999/10/11 09:39:54
***************
*** 1205,1212 ****
pp_liveness :: Liveness -> SDoc
pp_liveness lv =
case lv of
- LvSmall mask -> int (intBS mask)
LvLarge lbl -> char '&' <> pprCLabel lbl
\end{code}
%************************************************************************
--- 1205,1216 ----
pp_liveness :: Liveness -> SDoc
pp_liveness lv =
case lv of
LvLarge lbl -> char '&' <> pprCLabel lbl
+ LvSmall mask
+ | bitmap_int == (minBound :: Int) -> int (bitmap_int+1) <> text
"-1"
+ | otherwise -> int bitmap_int
+ where
+ bitmap_int = intBS mask
\end{code}
%************************************************************************
