llvm dev - Oct 2014 - [LLVMdev] Lib C++ buildbot problem

Folks,

I'm trying to set up a libc++ buildbot on ARM and I found an
inconsistency which I'm not sure how to fix.

I got a build error like this:

libc++abi.so: undefined reference to `_Unwind_GetGR'

Since I expected that the symbol would be provided by that library, I
searched the CMake on libc++abi and found this:

option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM unwinder."
OFF)
...
if (LIBCXXABI_USE_LLVM_UNWINDER)
  add_subdirectory(src/Unwind)
endif()

But on the Libc++AndAbiBuilder, there's no way to set the CMake
argument (or is there?):

def getLibcxxAndAbiBuilder(f=None, env={}, additional_features=set()):

"additional_features" seem to imply only lit test args, not anything
else.

Ideas?

cheers,
--renato

+Dan Albert

On 10/20/14 4:53 AM, Renato Golin wrote:
> Folks,
> 
> I'm trying to set up a libc++ buildbot on ARM and I found an
> inconsistency which I'm not sure how to fix.
> 
> I got a build error like this:
> 
> libc++abi.so: undefined reference to `_Unwind_GetGR'
> 
> Since I expected that the symbol would be provided by that library, I
> searched the CMake on libc++abi and found this:
> 
> option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM
unwinder." OFF)
> ...
> if (LIBCXXABI_USE_LLVM_UNWINDER)
>   add_subdirectory(src/Unwind)
> endif()
> 
> But on the Libc++AndAbiBuilder, there's no way to set the CMake
> argument (or is there?):
I *think* you can add "-DLIBCXXABI_USE_LLVM_UNWINDER" to the env
argument and
get what you want, but Dan will have to correct me on
that...
> 
> def getLibcxxAndAbiBuilder(f=None, env={}, additional_features=set()):
> 
> "additional_features" seem to imply only lit test args, not
anything else.
They are lit test args, and triggers for -D defines for various weird
configurations (e.g. single threaded). I don't think there is one for the
unwinder (nor do I think it makes sense to add one for that).


Cheers,

Jon
> 
> Ideas?
> 
> cheers,
> --renato
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> 
-- 
Jon Roelofs
jonathan at codesourcery.com
CodeSourcery / Mentor Embedded

>
> But on the Libc++AndAbiBuilder, there's no way to set the CMake
> argument (or is there?):

No, there isn't. Should be simple enough to add though. I'd add it as a
dict param.

On Mon, Oct 20, 2014 at 8:11 AM, Jonathan Roelofs <jonathan at
codesourcery.com
> wrote:
> +Dan Albert
>
> On 10/20/14 4:53 AM, Renato Golin wrote:
> > Folks,
> >
> > I'm trying to set up a libc++ buildbot on ARM and I found an
> > inconsistency which I'm not sure how to fix.
> >
> > I got a build error like this:
> >
> > libc++abi.so: undefined reference to `_Unwind_GetGR'
> >
> > Since I expected that the symbol would be provided by that library, I
> > searched the CMake on libc++abi and found this:
> >
> > option(LIBCXXABI_USE_LLVM_UNWINDER "Build and use the LLVM
unwinder."
> OFF)
> > ...
> > if (LIBCXXABI_USE_LLVM_UNWINDER)
> >   add_subdirectory(src/Unwind)
> > endif()
> >
> > But on the Libc++AndAbiBuilder, there's no way to set the CMake
> > argument (or is there?):
> I *think* you can add "-DLIBCXXABI_USE_LLVM_UNWINDER" to the env
argument
> and
> get what you want, but Dan will have to correct me on that...
> >
> > def getLibcxxAndAbiBuilder(f=None, env={}, additional_features=set()):
> >
> > "additional_features" seem to imply only lit test args, not
anything
> else.
> They are lit test args, and triggers for -D defines for various weird
> configurations (e.g. single threaded). I don't think there is one for
the
> unwinder (nor do I think it makes sense to add one for that).
>
>
> Cheers,
>
> Jon
> >
> > Ideas?
> >
> > cheers,
> > --renato
> > _______________________________________________
> > LLVM Developers mailing list
> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >
>
> --
> Jon Roelofs
> jonathan at codesourcery.com
> CodeSourcery / Mentor Embedded
>
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