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

[Federico Mastellone]

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")
>>  ,("Host platform","x86_64-apple-darwin")
>>  ,("Target platform","x86_64-apple-darwin")
>>  ,("Have interpreter","YES")
>>  ,("Object splitting supported","YES")
>>  ,("Have native code generator","YES")
>>  ,("Support SMP","YES")
>>  ,("Tables next to code","YES")
>>  ,("RTS ways","l debug thr thr_debug thr_l thr_p dyn debug_dyn thr_dyn thr_debug_dyn l_dyn thr_l_dyn")
>>  ,("Support dynamic-too","YES")
>>  ,("Support parallel --make",

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