Compiling GHC with Clang

[Christian Maeder]

I had a similar problem on a Mac (and clang) that I could solve by 
updating to the versions of (happy and) alex that you already use. Are 
you sure that Lexer.hs was freshly (re-)generated?

HTH Christian

Am 02.04.2014 09:14, schrieb Herbert Valerio Riedel:
> Hello *,
>
> I've been trying to compile GHC with Clang instead of GCC on Ubuntu, by
> configuring the build with
>
>    CC=/usr/bin/clang ./configure --with-gcc=/usr/bin/clang
>
> but then, 'make' runs into
>
> ,----
> | "inplace/bin/ghc-stage1" -hisuf hi -osuf  o -hcsuf hc -static  -H64m -O0 -fasm    -package-name ghc-7.8.0.20140401 -hide-all-packages -i -icompiler/basicTypes -icompiler/cmm -icompiler/codeGen -icompiler/coreSyn -icompiler/deSugar -icompiler/ghci -icompiler/hsSyn -icompiler/iface -icompiler/llvmGen -icompiler/main -icompiler/nativeGen -icompiler/parser -icompiler/prelude -icompiler/profiling -icompiler/rename -icompiler/simplCore -icompiler/simplStg -icompiler/specialise -icompiler/stgSyn -icompiler/stranal -icompiler/typecheck -icompiler/types -icompiler/utils -icompiler/vectorise -icompiler/stage2/build -icompiler/stage2/build/autogen -Icompiler/stage2/build -Icompiler/stage2/build/autogen -Icompiler/. -Icompiler/parser -Icompiler/utils -Icompiler/../rts/dist/build -Icompiler/stage2   -optP-DGHCI -optP-include -optPcompiler/stage2/build/autogen/cabal_macros.h -package Cabal-1.18.1.3 -package array-0.5.0.0 -package base-4.7.0.0 -package bin-package-db-0.0.0.0 -package by
 testring-
0.10.4.0 -package containers-0.5.5.1 -package directory-1.2.1.0 -package filepath-1.3.0.2 -package hoopl-3.10.0.0 -package hpc-0.6.0.1 -package process-1.2.0.0 -package template-haskell-2.9.0.0 -package time-1.4.2 -package transformers-0.3.0.0 -package unix-2.7.0.1 -Wall -fno-warn-name-shadowing -XHaskell98 -XCPP -XMagicHash -XUnboxedTuples -XPatternGuards -XForeignFunctionInterface -XEmptyDataDecls -XTypeSynonymInstances -XMultiParamTypeClasses -XFlexibleInstances -XRankNTypes -XScopedTypeVariables -XDeriveDataTypeable -XBangPatterns -XNondecreasingIndentation -optc-DTHREADED_RTS -DGHCI_TABLES_NEXT_TO_CODE -DSTAGE=2 -O0 -fasm  -no-user-package-db -rtsopts      -odir compiler/stage2/build -hidir compiler/stage2/build -stubdir compiler/stage2/build  -dynamic-too -c compiler/stage2/build/Lexer.hs -o compiler/stage2/build/Lexer.o -dyno compiler/stage2/build/Lexer.dyn_o
> |
> | compiler/stage2/build/Lexer.hs:2426:41:
> |     Couldn't match expected type ‘[Char]’ with actual type ‘Int#’
> |     In the first argument of ‘(>=)’, namely ‘offset’
> |     In the expression: (offset >= "0#")
> |
> | compiler/stage2/build/Lexer.hs:2426:41:
> |     Couldn't match expected type ‘Int#’ with actual type ‘Bool’
> |     In the expression: (offset >= "0#")
> |     In the first argument of ‘(&&)’, namely
> |       ‘(tagToEnum# (offset >= "0#"))’
> |     In the expression:
> |       (tagToEnum# (offset >= "0#")) && (tagToEnum# (check == "ord_c"))
> |
> | compiler/stage2/build/Lexer.hs:2426:73:
> |     Couldn't match expected type ‘[Char]’ with actual type ‘Int#’
> |     In the first argument of ‘(==)’, namely ‘check’
> |     In the expression: (check == "ord_c")
> |
> | compiler/stage2/build/Lexer.hs:2426:73:
> |     Couldn't match expected type ‘Int#’ with actual type ‘Bool’
> |     In the expression: (check == "ord_c")
> |     In the second argument of ‘(&&)’, namely
> |       ‘(tagToEnum# (check == "ord_c"))’
> |     In the expression:
> |       (tagToEnum# (offset >= "0#")) && (tagToEnum# (check == "ord_c"))
> | make[1]: *** [compiler/stage2/build/Lexer.o] Error 1
> | make: *** [all] Error 2
> `----
>
> the versions of happy & alex were:
>
> ,----
> | $ happy --version
> | Happy Version 1.19.3 Copyright (c) 1993-1996 Andy Gill, Simon Marlow (c) 1997-2005 Simon Marlow
> |
> | $ alex --version
> | Alex version 3.1.3, (c) 2003 Chris Dornan and Simon Marlow
> `----
>
> ...anyone know why this happens when using Clang instead of GCC, or
> better yet, what I need to do in order to build GHC with Clang on Linux?
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