You need a 64-bit ghc and gcc to build a 64-bit ghc. If that's what you want instructions are here: https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Windows/MSYS2 Niklas ----- Ursprungligt meddelande ----- Från: "Niculae Ionita" Skickat: ‎2014-‎04-‎06 12:27 Till: "GHC Dev List" Ämne: Trying to build 64 bit GHC on Windows with the 32 bit version Hi, I got yesterday the sources (HEAD) of GHC and configured with ./configure --target=amd64-unknown-mingw32 which finally succeeded. But when I start make, I get almost in the beginning this error message: ===--- building phase 0 make -r --no-print-directory -f ghc.mk phase=0 phase_0_builds libraries/hpc/ghc.mk:3: libraries/hpc/dist-boot/package-data.mk: No such file or directory libraries/Cabal/Cabal/ghc.mk:3: libraries/Cabal/Cabal/dist-boot/package-data.mk: No such file or directory libraries/bin-package-db/ghc.mk:3: libraries/bin-package-db/dist-boot/package-data.mk: No such file or directory libraries/hoopl/ghc.mk:3: libraries/hoopl/dist-boot/package-data.mk: No such file or directory libraries/transformers/ghc.mk:3: libraries/transformers/dist-boot/package-data.mk: No such file or directory libraries/dph/ghc.mk:134: *** dph_th_deps(v): libraries/dph/dph-base_dist-install_GHCI_LIB not defined!. Stop. make: *** [all] Error 2 Is it really something wrong in the dph or am I do something wrong? I have currently the 32 bit Windows version of HP-2013.02.0.0 installed. Regards, Nicu _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://www.haskell.org/mailman/listinfo/ghc-devs