I got my ARM (v5) ghc cross compiler built the other day by making sure I had only the latest LLVM and Haskell Platform host packages, tweaking settings and commenting out haskeline and terminfo in the top level ghc.mk . There's something broken about terminfo but life's too short to worry about since it's not needed. The ARM cross ghc seems to product viable executables for simple code. Now a sister product is a PowerPC (MPC854E) and the ABI is gnuspe. In my PATH are (only) clangs and llcs from http://llvm.org/releases/3.4.2/clang+llvm-3.4.2-x86_64-unknown-ubuntu12.04.x... and ghc from https://www.haskell.org/platform/download/2014.2.0.0/haskell-platform-2014.2... Because of the none vendor I didn't seem able to put in the target I configured like this. ./configure --target=powerpc-linux-gnuspe --with-gcc=powerpc-none-linux-gnuspe-gcc --with-nm=powerpc-none-linux-gnuspe-nm --with-ld=powerpc-none-linux-gnuspe-ld --with-ar=powerpc-none-linux-gnuspe-ar --with-ranlib=powerpc-none-linux-gnuspe-ranlib This fails as follows. It seems to have generated x86 opcodes including movq unless it's something to do with GNU assembly trying to make everything have the same apparent instruction set then again %rcx and %esi are mentioned. ====== cp libffi/build/inst/lib/libffi.a rts/dist/build/libCffi_thr_l.a "inplace/bin/ghc-stage1" -hisuf hi -osuf o -hcsuf hc -static -H64m -O0 -package-name ghc-prim-0.3.1.0 -hide-all-packages -i -ilibraries/ghc-prim/. -ilibraries/ghc-prim/dist-install/build -ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/dist-install/build -Ilibraries/ghc-prim/dist-install/build/autogen -Ilibraries/ghc-prim/. -optP-include -optPlibraries/ghc-prim/dist-install/build/autogen/cabal_macros.h -package rts-1.0 -package-name ghc-prim -XHaskell2010 -O -fllvm -no-user-package-db -rtsopts -odir libraries/ghc-prim/dist-install/build -hidir libraries/ghc-prim/dist-install/build -stubdir libraries/ghc-prim/dist-install/build -c libraries/ghc-prim/./GHC/Types.hs -o libraries/ghc-prim/dist-install/build/GHC/Types.o /tmp/ghc30000_0/ghc30000_5.s: Assembler messages: /tmp/ghc30000_0/ghc30000_5.s:8:0: Error: Unrecognized opcode: `movl' and so on with opcodes such as jbe, leal, jmpq and also "junk at end of line: `rcx),%esi'" ====== in libffi/build/powerpc-unknown-linux-gnuspe there's a sensible config.log with x86_64 in the build variables and powerpc in the host and target ones. How do I go about making this work ? Thanks, Jon