Hey, When I cross compile to arm-unknown-nto-qnx8.0.0eabi and add DDEBUG to GhcStage1HcOpts I get: "inplace/bin/ghc-stage1" -static -H64m -O0 -fllvm -package-name base-4.7.0.0 -hide-all-packages -i -ilibraries/base/. -ilibraries/base/dist-install/build -ilibraries/base/dist-install/build/autogen -Ilibraries/base/dist-install/build -Ilibraries/base/dist-install/build/autogen -Ilibraries/base/include -optP-include -optPlibraries/base/dist-install/build/autogen/cabal_macros.h -package ghc-prim-0.3.1.0 -package integer-simple-0.1.1.0 -package rts-1.0 -package-name base -XHaskell98 -XCPP -O -fllvm -no-user-package-db -rtsopts -odir libraries/base/dist-install/build -hidir libraries/base/dist-install/build -stubdir libraries/base/dist-install/build -hisuf hi -osuf o -hcsuf hc -c libraries/base/./Unsafe/Coerce.hs -o libraries/base/dist-install/build/Unsafe/Coerce.o "inplace/bin/ghc-stage1" -static -H64m -O0 -fllvm -package-name base-4.7.0.0 -hide-all-packages -i -ilibraries/base/. -ilibraries/base/dist-install/build -ilibraries/base/dist-install/build/autogen -Ilibraries/base/dist-install/build -Ilibraries/base/dist-install/build/autogen -Ilibraries/base/include -optP-include -optPlibraries/base/dist-install/build/autogen/cabal_macros.h -package ghc-prim-0.3.1.0 -package integer-simple-0.1.1.0 -package rts-1.0 -package-name base -XHaskell98 -XCPP -O -fllvm -no-user-package-db -rtsopts -odir libraries/base/dist-install/build -hidir libraries/base/dist-install/build -stubdir libraries/base/dist-install/build -hisuf hi -osuf o -hcsuf hc -c libraries/base/./GHC/Int.hs -o libraries/base/dist-install/build/GHC/Int.o ghc-stage1: panic! (the 'impossible' happened) (GHC version 7.7.20130109 for arm-unknown-nto-qnx): ASSERT failed! file compiler/basicTypes/Literal.lhs line 222 2147483648 I do not know if this is fatal, but I would like to have a build with debug symbols ... Regards, Nathan