Problem with cabal's --enable-library-coverage on 7.8.1rc2

[Federico Mastellone]

I don’t know the cause of the error, I commented on this related cabal issue I found: https://github.com/haskell/cabal/issues/1700

On Mar 10, 2014, at 14:41, Carter Schonwald <carter.schonwald at gmail.com> wrote:

> So, was the issue cabal not catching the linker error?
> 
> 
> On Mon, Mar 10, 2014 at 12:04 PM, Federico Mastellone <fmaste at gmail.com> wrote:
> Found the problem,
> 
> I did not have the modules that were used but not exposed enumerated under "other-modules” on cabal's library definition. This builds OK on 7.6.3 even with a correct code coverage report, but fails to build with the linking error under 7.8-rc2. When I add the “other-modules” it works on both.
> 
> 
> On Mar 9, 2014, at 17:26, Carter Schonwald <carter.schonwald at gmail.com> wrote:
> 
>> great!
>> Thanks for taking the time to shrink the bug, look forward to helping on the ticket
>> 
>> 
>> On Sun, Mar 9, 2014 at 12:32 PM, Federico Mastellone <fmaste at gmail.com> wrote:
>> With a package of mine that I reduced it to just two modules, the one on the link below. 
>> I did not file a bug, I wanted to ask here first. I'll do it now
>> 
>> On 09/03/2014, at 11:41, Carter Schonwald <carter.schonwald at gmail.com> wrote:
>> 
>>> Ok. What cabal package?  Have you filed a bug report on ghc trac?
>>> 
>>> On Sunday, March 9, 2014, Federico Mastellone <fmaste at gmail.com> wrote:
>>> Downloaded gcc-4.9 binary from http://hpc.sourceforge.net and tested again with both 7.6.3 and 7.8-rc2
>>> 
>>> Fails with the same error with 7.8-rc2 and does not fail with 7.6.3
>>> 
>>> ld: illegal text reloc in '_enablezmlibraryzmcoveragezm0zi0zi1_Library_sendMsg2_info' to '__hpc_tickboxes_enablezmlibraryzmcoveragezm0zi0zi1_Util_hpc' for architecture x86_64
>>> collect2: error: ld returned 1 exit status
>>> 
>>> On Mar 7, 2014, at 16:58, Carter Schonwald <carter.schonwald at gmail.com> wrote:
>>> 
>>>> No.  Try real GCC.  Follow my linked directions.  Xcode GCC is fake.  It's clang.  Follow my directions please. 
>>>> 
>>>> On Friday, March 7, 2014, Federico Mastellone <fmaste at gmail.com> wrote:
>>>> It’s the same error with and without the clang-xcode5-wrapper that is named as an alternative solution 
>>>> 
>>>> On Mar 7, 2014, at 13:10, Carter Schonwald <carter.schonwald at gmail.com> wrote:
>>>> 
>>>>> try using real GCC
>>>>> 
>>>>> i have these directions https://gist.github.com/cartazio/7131371
>>>>> 
>>>>> 
>>>>> On Fri, Mar 7, 2014 at 10:47 AM, Federico Mastellone <fmaste at gmail.com> wrote:
>>>>> Hi,
>>>>> 
>>>>> On Mac OS X 10.9.2 with ghc 7.8.0.20140228 and cabal 1.18.0.3
>>>>> 
>>>>> Doing:
>>>>> cabal configure --enable-library-coverage
>>>>> cabal build
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> Fails with:
>>>>>> ld: illegal text reloc in '_enablezmlibraryzmcoveragezm0zi0zi1_Library_sendMsg2_info' to '__hpc_tickboxes_enablezmlibraryzmcoveragezm0zi0zi1_Util_hpc' for architecture x86_64
>>>>>> clang: error: linker command failed with exit code 1 (use -v to see invocation)
>>>>> 
>>>>> But without the coverage flag it’s OK.
>>>>> 
>>>>> I found it when switching from 7.6.3 to 7.8.1RC2 on a project I have and was able to strip it to this:
>>>>> https://github.com/fmaste/ghc-7.8.0.20140228-enable-library-coverage
>>>>> 
>>>>> Don’t know if this is a cabal or ghc problem and I don’t know how to continue.
>>>>> 
>>>>> Thanks!
>>>>> 
>>>>> My ghc —info:
>>>>>  [("Project name","The Glorious Glasgow Haskell Compilation System")
>>>>>  ,("GCC extra via C opts"," -fwrapv")
>>>>>  ,("C compiler command","/usr/bin/gcc")
>>>>>  ,("C compiler flags"," -m64 -fno-stack-protector")
>>>>>  ,("C compiler link flags"," -m64")
>>>>>  ,("ld command","/usr/bin/ld")
>>>>>  ,("ld flags"," -arch x86_64")
>>>>>  ,("ld supports compact unwind","YES")
>>>>>  ,("ld supports build-id","NO")
>>>>>  ,("ld supports filelist","YES")
>>>>>  ,("ld is GNU ld","NO")
>>>>>  ,("ar command","/usr/bin/ar")
>>>>>  ,("ar flags","clqs")
>>>>>  ,("ar supports at file","NO")
>>>>>  ,("touch command","touch")
>>>>>  ,("dllwrap command","/bin/false")
>>>>>  ,("windres command","/bin/false")
>>>>>  ,("libtool command","libtool")
>>>>>  ,("perl command","/usr/bin/perl")
>>>>>  ,("target os","OSDarwin")
>>>>>  ,("target arch","ArchX86_64")
>>>>>  ,("target word size","8")
>>>>>  ,("target has GNU nonexec stack","False")
>>>>>  ,("target has .ident directive","True")
>>>>>  ,("target has subsections via symbols","True")
>>>>>  ,("Unregisterised","NO")
>>>>>  ,("LLVM llc command","llc")
>>>>>  ,("LLVM opt command","opt")
>>>>>  ,("Project version","7.8.0.20140228")
>>>>>  ,("Booter version","7.6.3")
>>>>>  ,("Stage","2")
>>>>>  ,("Build platform","x86_64-apple-darwin")
>>>>>  ,("Hos
>> 
> 
> 

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