Hi, I have recently tried to compile the 6.6 version of ghc from the darcs repository. I followed the intructions to pull ghc from the repository: darcs get --partial http://darcs.haskell.org/ghc-6.6/ghc cd ghc chmod +x darc-add ./darcs-add -extra pull The build process seems to get past stage 1, but fails at the beginning of stage 2: ../compiler/ghc-inplace -optc-O -optc-Wall -optc-W -optc-Wstrict-prototypes -optc-Wmissing-prototypes -optc-Wmissing-declarations -optc-Winline -optc-Waggregate-return -optc-Wbad-function-cast -optc-I../includes -optc-I. -optc-Iparallel -optc-DCOMPILING_RTS -optc-fomit-frame-pointer -optc-fno-strict-aliasing -H16m -O -optc-O2 -static -I. -#include HCIncludes.h -fvia-C -dcmm-lint -c Linker.c -o Linker.o Linker.c: In function 'loadObj': Linker.c:1383:0: error: 'misalignment' undeclared (first use in this function) Linker.c:1383:0: error: (Each undeclared identifier is reported only once Linker.c:1383:0: error: for each function it appears in.) make[1]: *** [Linker.o] Error 1 make: *** [stage1] Error 1 I am compiling this with ghc-6.6 (the latest version from darcs) and gcc 4.0. Kind regards, Chris.