-fvia-c doesn't work

[Malcolm Wallace]

Yesterday, I wrote:

> It seems that I am unable to use -fvia-c with ghc, because it gives
> some C header file conflicts.  Here is the observable problem:
> 
>     $ ghc-6.2.1 -c -fvia-c /tmp/ghcbug.hs
>     In file included from /usr/include/stdlib.h:414,
>                      from
>                      /usr/malcolm/local/lib/ghc-6.2.1/include/Stg.h:200,
>                      from /tmp/ghc1723.hc:3:
>     /usr/include/sys/types.h:190: conflicting types for `int8_t'
>     stdint.h:33: previous declaration of `int8_t'

Weirdly, -fvia-c works just fine today, with all versions of ghc
installed locally.  It must have been something in my local machine
config, even though I haven't changed anything since!

Regards,
    Malcolm