Bug 839473 - llvm-3.1 missing ghc ARM support: causing all compiled programs to segfault
Summary: llvm-3.1 missing ghc ARM support: causing all compiled programs to segfault
Alias: None
Product: Fedora
Classification: Fedora
Component: llvm
Version: rawhide
Hardware: arm
OS: Unspecified
Target Milestone: ---
Assignee: Michel Alexandre Salim
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2012-07-12 04:53 UTC by Jens Petersen
Modified: 2012-07-14 17:33 UTC (History)
5 users (show)

Fixed In Version: llvm-3.1-7.fc18
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2012-07-14 17:33:28 UTC
Type: Bug

Attachments (Terms of Use)
regenerated ocaml patch (4.76 KB, patch)
2012-07-12 09:14 UTC, Peter Robinson
no flags Details | Diff

Description Jens Petersen 2012-07-12 04:53:12 UTC
Description of problem:
Apparently somehow llvm-3.1 is missing the ghc ARM support
that was merged into llvm-3.0.  Presumably an upstream mistake.
Anyway I think we need to patch llvm-3.1 for ARM if we want
have functioning ghc in F18 ARM.  Currently Haskell programs linked
with llvm-3.1 segfault very early on.

How reproducible:

Steps to Reproduce:
1. try to build any ghc-* package with f18 arm
2. minimal testcase:
$ cat > hello.hs
main = putStrLn "hello"
$ ghc --make hello.hs
$ ./hello
Actual results:

Expected results:
no segfaults

Additional info:

Comment 1 Jens Petersen 2012-07-12 05:09:37 UTC
Just to confirm: reverting to llvm-3.0-13.fc18 fixes the ARM segfaults.

Comment 2 Jens Petersen 2012-07-12 06:19:25 UTC
According to the mail the original llvm-3.0 patch should work also for 3.1:


Comment 3 Peter Robinson 2012-07-12 09:14:08 UTC
Referenced patch didn't apply cleanly on ARM. There was another one attached to the original email post that was much closer.


It needed one section manually applied so the attched patch I think is good.

The following is a scratch build if someone could test that is fixes the problem I'll push the change I have in my local git and build it properly.


Comment 4 Peter Robinson 2012-07-12 09:14:59 UTC
Created attachment 597745 [details]
regenerated ocaml patch

Comment 5 Peter Robinson 2012-07-12 09:37:48 UTC
This is the build 


Comment 6 Jens Petersen 2012-07-12 09:44:42 UTC
Thanks Peter for working on this.  I will try to test your build.

Comment 7 Jens Petersen 2012-07-13 01:20:50 UTC
(In reply to comment #5)
> This is the build 
> http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=959567

I successfully tested it on armv5tel and it fixes the ghc segfaults
so looks good to me (tested both hello.hs and building the hscolour
package in mock).

I can try to test armv7hl later using the koji static repo
(the arm rawhide seems to have some perl breakage today.)

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