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

[Federico Mastellone]

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","YES")
 ,("Dynamic by default","NO")
 ,("GHC Dynamic","YES")
 ,("Leading underscore","YES")
 ,("Debug on","False")
 ]
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