[Haskell-iPhone] Can anyone help me test GHC-iOS compiler?

Stephen Blackheath [to GHC-iPhone] likeliest.complexions.stephen at blacksapphire.com
Sun Aug 11 23:37:35 CEST 2013


Luke,

I didn't experience anything like you described. Here's as much detail 
as I can think of about what I did:

  * Mac OS/X 10.8.4

  * Xcode 4.6

  * ghc-7.6.3 downloaded from http://haskell.org/ghc as the bootstrap 
compiler

  * llvm - 3.0 built from source downloaded off the llvm site:

Low Level Virtual Machine (http://llvm.org/):
   llvm version 3.0
   Optimized build.
   Built Jan 31 2012 (09:33:35).
   Host: x86_64-apple-darwin12.4.0
   Host CPU: penryn

   Registered Targets:
     alpha    - Alpha [experimental]
     arm      - ARM
     ... and others ...

Before I had a problem with not enough memory but I bought some more. So 
I got a cross compiler built, but wasn't able to test it, because I 
can't authorize my iPod Touch for development at the moment (Apple 
systems are down). So I can't verify that it produces iOS executables 
that work.

The latest commit in the git log for GHC HEAD was this:

commit e8aa8ccba0c40884765281b21ff8f4411802dd41
Author: Richard Eisenberg <eir at cis.upenn.edu>
Date:   Fri Aug 2 15:47:03 2013 +0100

     Implement "roles" into GHC.
     ...

I patched it as attached here (same patch as in my last email).

The procedure I used was exactly the one described at 
http://ghc.haskell.org/trac/ghc/wiki/Building/CrossCompiling/iOS

Thanks for your work on this! That problem you're having is pretty weird!


Steve

On 11/08/13 20:14, Luke Iannini wrote:
> And the truly final word for the moment : ) —
> I built a tool to partially automate the indentation workaround for LLVM
> 3.0 and it yields the same "co-processor offset out of
> range"/"unsupported relocation on symbol LCPI65_0" errors LLVM 3.3/3.4
> did when it finally gets to integer-simple/GHC/Integer/Type.hs.
>
>
> On Sun, Aug 11, 2013 at 3:06 AM, Luke Iannini <lukexipd at gmail.com
> <mailto:lukexipd at gmail.com>> wrote:
>
>     OK! So just to summarize:
>     Building GHC HEAD with LLVM 3.0 or 3.2 (using GHC 7.6.3 as the
>     bootstrap) on OS X 10.9 DP5/Xcode 5 DP5 exhibits very strange
>     behavior wherein layout-based code along with mixed-tabs-and-spaces
>     code fails to parse correctly, with issues in hundreds of files in
>     the GHC HEAD tree.
>     I don't have a 10.8 machine to check if this is a 10.9 exclusive
>     issue, so I'd love if someone can try using these binaries to build
>     GHC HEAD:
>     http://llvm.org/releases/3.0/clang+llvm-3.0-x86_64-apple-darwin11.tar.gz
>
>     Building GHC HEAD with LLVM 3.3 or 3.4 works great as a regular
>     compiler with the 10.9 workarounds I outlined in another thread, but
>     fails when compiling as a cross-compiler (./configure
>     --target=arm-apple-darwin10) with these errors:
>     https://gist.github.com/lukexi/2b129f34fa027172c5ee
>
>     So I'm between a rock and a hard place at the moment.
>
>     The only (very tedious and slow) workaround I've found for the
>     3.0/3.2 bug is to manually expand tabs to spaces, and to transform
>     do x
>         y
>     into
>     do
>          x
>          y
>     (similarly for where and let blocks)
>
>     Cheers
>     Luke
>
>
>     On Sun, Aug 11, 2013 at 1:53 AM, Luke Iannini <lukexipd at gmail.com
>     <mailto:lukexipd at gmail.com>> wrote:
>
>         Argh, sorry for the confusion: 3.2 *does* exhibit the issue. 3.3
>         and 3.4 do not.
>
>
>         On Sun, Aug 11, 2013 at 1:39 AM, Luke Iannini
>         <lukexipd at gmail.com <mailto:lukexipd at gmail.com>> wrote:
>
>             Further investigation:
>
>             I grabbed 7.6.3 just to see if I somehow had a bad install
>             of GHC, but the problem still occurred.
>
>             The problem only occurs with LLVM 3.0.
>
>             It is not related to cross-compilation or Stephen's patches:
>             I tested this on multiple fresh clones with --with-gcc=clang.
>
>             LLVM 3.2, 3.3 and 3.4 do not exhibit the issue.
>
>             If anyone wants to try to reproduce, you can grab the LLVM
>             3.0 binaries here Clang Binaries for MacOS X/x86-64
>             <http://llvm.org/releases/3.0/clang+llvm-3.0-x86_64-apple-darwin11.tar.gz> and
>             just drop them in your path.
>
>             (Stephen, I'm now trying your patch with LLVM 3.2)
>
>             Cheers
>             Luke
>
>
>             On Sat, Aug 10, 2013 at 8:11 PM, Luke Iannini
>             <lukexipd at gmail.com <mailto:lukexipd at gmail.com>> wrote:
>
>                 The first error on a fresh checkout is
>
>                 "/usr/local/bin/ghc" -hisuf hi -osuf  o -hcsuf hc
>                 -static  -H32m -O  -package-db
>                 libraries/bootstrapping.conf  -hide-all-packages -i
>                 -iutils/hsc2hs/. -iutils/hsc2hs/dist/build
>                 -iutils/hsc2hs/dist/build/autogen
>                 -Iutils/hsc2hs/dist/build
>                 -Iutils/hsc2hs/dist/build/autogen     -optP-include
>                 -optPutils/hsc2hs/dist/build/autogen/cabal_macros.h
>                 -package base-4.6.0.1 -package containers-0.5.0.0
>                 -package directory-1.2.0.1 -package filepath-1.3.0.1
>                 -package process-1.1.0.2 -XHaskell98 -XCPP
>                 -XForeignFunctionInterface  -no-user-package-db
>                 -rtsopts      -odir utils/hsc2hs/dist/build -hidir
>                 utils/hsc2hs/dist/build -stubdir utils/hsc2hs/dist/build
>                    -c utils/hsc2hs/./C.hs -o utils/hsc2hs/dist/build/C.o
>
>
>                 utils/hsc2hs/C.hs:155:3:
>
>                      parse error (possibly incorrect indentation or
>                 mismatched brackets)
>
>
>                 There seem to be two classes of error: one is the layout
>                 issue above, but other files can be fixed by simply
>                 running 'expand' on them.
>
>
>
>                 On Sat, Aug 10, 2013 at 6:42 PM, Luke Iannini
>                 <lukexipd at gmail.com <mailto:lukexipd at gmail.com>> wrote:
>
>                     Hi Stephen/all,
>
>                     I got LLVM 3.0 installed and started building again
>                     but hit a very strange problem now wherein tons of
>                     layout-based code (as in
>                     http://en.wikibooks.org/wiki/Haskell/Indentation) is
>                     suddenly erroring out, e.g.
>                     compiler/coreSyn/CoreUnfold.lhs:481:2:
>                          parse error (possibly incorrect indentation or
>                     mismatched brackets)
>                     (some files also seem to be triggered by mixed tabs
>                     and spaces)
>
>                     I can fix the errors one by one by converting the
>                     code to use more concrete indentation (like
>                     do
>                          thing1
>                          thing2
>                     )
>                     but it's all over the tree.
>
>                     Anyone have any idea what might cause this?
>
>                     Cheers
>                     Luke
>
>
>                     On Fri, Aug 9, 2013 at 6:14 AM, Stephen Blackheath
>                     [to GHC-iPhone]
>                     <likeliest.complexions.stephen at blacksapphire.com
>                     <mailto:likeliest.complexions.stephen at blacksapphire.com>>
>                     wrote:
>
>                         Luke,
>
>                         Try llvm version 3.0 - that's what I'm using,
>                         and it definitely worked before. llvm-3.1 is
>                         broken for GHC+ARM. As for llvm >= 3.2, I'm not
>                         sure if it's been fixed yet, but it wasn't
>                         working last time I tried a couple of months
>                         ago. I think this was because llvm is getting
>                         fussier about its input and GHC hasn't been
>                         "tightened up" yet.
>
>                         It's really easy to build llvm from source.
>
>
>                         Steve
>
>
>                         On 09/08/13 20:35, Luke Iannini wrote:
>
>                             v3 output:
>                             https://gist.github.com/__lukexi/7ca55b36269703236f1f
>                             <https://gist.github.com/lukexi/7ca55b36269703236f1f>
>
>
>                             On Fri, Aug 9, 2013 at 4:34 AM, Luke Iannini
>                             <lukexipd at gmail.com <mailto:lukexipd at gmail.com>
>                             <mailto:lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>>> wrote:
>
>                                  OK, that got me past that one.
>
>                                  Now I'm stuck here during compilation
>                             of integer-simple:
>                             https://gist.github.com/__lukexi/d9f8bfd8bca56d5d0ee9
>                             <https://gist.github.com/lukexi/d9f8bfd8bca56d5d0ee9>
>
>                                  ("unsupported relocation on
>                             symbol"/"co-processor offset out of range")
>
>
>                                  On Fri, Aug 9, 2013 at 4:00 AM, Luke
>                             Iannini <lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>
>                                  <mailto:lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>>> wrote:
>
>                                      OK, I'm underway on this.
>
>                                      First roadbump was:
>
>
>                                      "inplace/bin/ghc-stage1" -static
>                             -H32m -O -Iincludes
>                                      -Iincludes/dist
>                             -Iincludes/dist-__derivedconstants/header
>
>                             -Iincludes/dist-ghcconstants/__header -Irts
>                             -Irts/dist/build
>                                      -DCOMPILING_RTS -package-name rts
>                             -dcmm-lint -i -irts
>                                      -irts/dist/build
>                             -irts/dist/build/autogen -Irts/dist/build
>                                      -Irts/dist/build/autogen -O2 -c
>                             rts/Apply.cmm -o
>                                      rts/dist/build/Apply.o
>
>
>
>
>                                      You are using a new version of LLVM
>                             that hasn't been tested yet!
>                                      We will try though...
>                                      /usr/local/bin/llc: : error: unable
>                             to get target for
>                                      'arm-apple-darwin10', see --version
>                             and --triple.
>
>
>                                      which I figured out were because
>                             the homebrew LLVM 3.4 only
>                                      includes host platforms by default
>                             (x86/x86-64)
>                                      Reinstalling it with all-targets
>                             enables them all:
>                                      brew install llvm --with-clang
>                             --all-targets --HEAD
>
>                                      Trying again now.
>
>
>
>
>                                      On Thu, Aug 8, 2013 at 5:29 PM,
>                             Luke Iannini <lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>
>                                      <mailto:lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>>> wrote:
>
>                                          Update: I've got GHC HEAD
>                             building on 10.9 again, tonight
>                                          I'll dive into the iOS patch!
>                                          Cheers
>                                          Luke
>
>
>                                          On Wed, Aug 7, 2013 at 9:12 PM,
>                             Carter Schonwald
>                                          <carter.schonwald at gmail.com
>                             <mailto:carter.schonwald at gmail.com>
>
>                             <mailto:carter.schonwald at __gmail.com
>                             <mailto:carter.schonwald at gmail.com>>> wrote:
>
>                                              if you're on 10.8, just DL
>                             the 4.6 CLI tools to get
>                                              things working again.
>
>                                              If you're on 10.9, you'll
>                             need to use recent GHC head +
>                                              CLANG HEAD, (ok, the most
>                             recent XCODE 5 dev preview CLI
>                                              tools may have all the
>                             needed clang patches, but thats
>                                              still needing its own
>                             validation, orthogonal to the IOS
>                                              related issues )
>
>
>                                              On Tue, Aug 6, 2013 at 7:06
>                             PM, Luke Iannini
>                                              <lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>
>                             <mailto:lukexipd at gmail.com
>                             <mailto:lukexipd at gmail.com>>> wrote:
>
>                                                  Hi Stephen,
>
>                                                  I installed 10.9 for
>                             another project and thus am in
>                                                  the middle of fixing up
>                             my system to be able to
>                                                  build GHC again, but I
>                             think I'm close — as soon as
>                                                  I have it going I'll
>                             try this.
>
>                                                  In the meantime someone
>                             still on 10.8 should
>                                                  definitely try the patch!
>
>                                                  Hope you're great!
>                                                  Luke
>
>
>                                                  On Tue, Aug 6, 2013 at
>                             6:42 PM, Stephen Blackheath
>                                                  [to GHC-iPhone]
>
>                             <likeliest.complexions.__stephen at blacksapphire.com
>                             <mailto:likeliest.complexions.stephen at blacksapphire.com>
>
>                             <mailto:likeliest.complexions.__stephen at blacksapphire.com
>                             <mailto:likeliest.complexions.stephen at blacksapphire.com>>>
>
>                                                  wrote:
>
>                                                      Hi all,
>
>                                                      A couple of months
>                             ago I got some patches
>                                                      applied to GHC
>                             mainline for the ability to cross
>                                                      compile to iOS.
>                             I've been doing other things and
>                                                      now I want to test
>                             those changes. The trouble
>                                                      is, I am having
>                             Apple trouble and I can't get
>                                                      Xcode to work.
>
>                                                      If anyone is
>                             interested in testing it for me,
>                                                      I'd appreciate it.
>
>                                                      The patch attached
>                             here needs to be applied to
>                                                      GHC head. Using
>                             this, I was able to get the
>                                                      cross compiler to
>                             build. The instructions are here:
>
>                             http://ghc.haskell.org/trac/____ghc/wiki/Building/____CrossCompiling/iOS
>                             <http://ghc.haskell.org/trac/__ghc/wiki/Building/__CrossCompiling/iOS>
>
>
>                             <http://ghc.haskell.org/trac/__ghc/wiki/Building/__CrossCompiling/iOS
>                             <http://ghc.haskell.org/trac/ghc/wiki/Building/CrossCompiling/iOS>>
>
>
>                                                      Steve
>
>
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