[Mesa-dev] [Bug 93103] llvm symbols leak through, cause trouble with software rendering in llvm-linked software

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93103

--- Comment #5 from Tobias Schlüter <tobi at schlueters.de> ---
Thank you for the quick response!  I'll take the comments to mean that this
shouldn't happen with very recent versions of libmesa and llvm.  It does happen
with fairly recent versions though.

We verified on a colleague's system that the same error appears on Ubuntu 15.05
with libmesa 10.5.9 and libllvm 3.6, (there are some differences in the
backtrace because we used a slightly simpler way of triggering the bug as
documented in the ROOT bug report I was linking to).  I would be surprised if
Ubuntu uses scons for the build, but I don't know.  Backtrace:
===========================================================
#5  0x00007f5c3a87de31 in llvm::cl::AddLiteralOption(llvm::cl::Option&, char
const*) () from
/home/ritter/belle2/externals/development/Linux_x86_64/opt/root/lib/libCling.so
#6  0x00007f5c2d944e3a in
llvm::PassRegistry::enumerateWith(llvm::PassRegistrationListener*) () from
/usr/lib/x86_64-linux-gnu/libLLVM-3.6.so.1
#7  0x00007f5c2d6e86a8 in ?? () from /usr/lib/x86_64-linux-gnu/libLLVM-3.6.so.1
#8  0x00007f5c3d4585ba in ?? () from /lib64/ld-linux-x86-64.so.2
#9  0x00007f5c3d4586cb in ?? () from /lib64/ld-linux-x86-64.so.2
#10 0x00007f5c3d45d587 in ?? () from /lib64/ld-linux-x86-64.so.2
#11 0x00007f5c3d458464 in ?? () from /lib64/ld-linux-x86-64.so.2
#12 0x00007f5c3d45c9a3 in ?? () from /lib64/ld-linux-x86-64.so.2
#13 0x00007f5c3bea5fc9 in ?? () from /lib/x86_64-linux-gnu/libdl.so.2
#14 0x00007f5c3d458464 in ?? () from /lib64/ld-linux-x86-64.so.2
#15 0x00007f5c3bea662d in ?? () from /lib/x86_64-linux-gnu/libdl.so.2
#16 0x00007f5c3bea6061 in dlopen () from /lib/x86_64-linux-gnu/libdl.so.2
#17 0x00007f5c3938c47f in cling::DynamicLibraryManager::loadLibrary(std::string
const&, bool) () from
/home/ritter/belle2/externals/development/Linux_x86_64/opt/root/lib/libCling.so
...
============================================================

I don't agree with Emil that it is a problem on the ROOT side (even though the
installed a workaround): one should be able to use libmesa without being afraid
that symbols leak through that are not part of libmesa's public interface.

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