[LLVMdev] gold and debug information

[Jin Guoliang]

On Tue, Jul 20, 2010 at 12:39 PM, Devang Patel <devang.patel at gmail.com>wrote:

> On Tue, Jul 20, 2010 at 6:49 AM, Rafael Espindola <espindola at google.com>
> wrote:
> >> export PATH="$LLVMPREFIX/bin:$LLVMGCCPREFIX/bin:$PATH"
> >> export CC="llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm"
> >> export CXX="llvm-g++ -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm"
> >> export RANLIB=/bin/true
> >> export CFLAGS="-O4 -g"
> >>
> >> then configure, make, and then hit the error.
> >>
> >> The error only happens if the CFLAGS has -g in it.
> >
> > Can you reduce the testcase a bit? It would be a lot easier to
> > reproduce with the ld invocation and the .o files given to it.
>
> This (Unknown constant! in bitcode writer when -g is used) is a known
> bug in CloneModule, because it is not cloning MDNodes appropriately.
> So bug point is likely to run into this while reducing test case.
>
> I do not know whether gold is cloning module at -O4 or not.
>
> Is this bug fixed in mainline llvm?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20100720/6f878fc2/attachment.html>