Hi all: I'm hacking with ghc-3.02.src.tar.gz on several platforms, namely i386 and sparc ... Both platforms run with gcc-2.7.2.3 ( higher versions may be a risk , 2.95 was bad...) In sparc I have no problems, but in i386 I do obtain the next results (File : fptools/ghc/lib/posix/PosixProcPrim.hc) "../../../ghc/driver/ghc -i../misc -recomp -cpp -fglasgow-exts -fvia-C -Rghc-timing -O '-#include"cbits/libposix.h"' -c PosixProcPrim.hc -o PosixProcPrim.o -osuf o PosixProcPrim.hc:2244: fixed or forbidden register was spilled. This may be due to a compiler bug or to impossible asm statements or clauses." I think cc1 is reducing uncorrectly to asm code. Reading documents on gcc, I got this... ( File: /usr/docs/gcc/PROBLEMS ) May be has nothing to do... "3. When find_reloads is used to count number of spills needed it does not take into account the fact that a reload may turn out to be a dummy." May be this is rather a question for gcc , but... Does any body know where to add any flag to help gcc to reduce OK ? I tried no -O flag , -O2 ,-O1, but no sucess... Regards... Martinez-Torres.