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'
It seems to happen for all versions of ghc, from 5.04.3 right up to
a recent 20040926 snapshot. The gcc visible in my PATH is 3.2.2,
and I'm using Slackware 9 Linux. Using gcc directly to compile a
simple C program like
#include <stdint.h>
#include <stdlib.h>
int8_t test = 0;
doesn't cause any error. It doesn't matter whether ghc was installed
from a binary package, or if I compile it myself from the src tarball.
Anybody got any ideas? Is it a gcc problem or a ghc one? The only
reason I noticed this is because I tried using -O optimisation today
for the first time in ages, and -O implies -fvia-c.
Regards,
Malcolm
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