[Mesa-dev] [PATCH 4/7] Travis: add binutils 2.26 for a few more LLVM 3.9 builds

Emil Velikov emil.l.velikov at gmail.com
Thu Oct 5 16:46:15 UTC 2017

On 5 October 2017 at 17:28, Jan Vesely <jan.vesely at rutgers.edu> wrote:
> On Thu, 2017-10-05 at 11:19 +0100, Emil Velikov wrote:
>> From: Emil Velikov <emil.velikov at collabora.com>
>> Otherwise we error out at link stage as follows:
>> /usr/lib/llvm-3.9/lib/libLLVMAMDGPUCodeGen.a(R600OptimizeVectorRegisters.cpp.o):
>> unrecognized relocation (0x2a) in section
>> `.text._ZNK12_GLOBAL__N_119R600VectorRegMerger16getAnalysisUsageERN4llvm13AnalysisUsageE'
>> /usr/bin/ld: final link failed: Bad value
>> Cc: mesa-stable at lists.freedesktop.org
>> Cc: Jan Vesely <jan.vesely at rutgers.edu
>> Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
>> ---
>> Suspecting that there are due to LLVM/Clang itself being built with the
>> newer version. Something like that seems to be mentioned below.
>> AKA packaging bug or we're using the wrong package ;-)
>> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808205
>> AFAICT it has nothing to do with linking against libclang.so
> it does, in a way that linking to dynamic library does not hit this
> issue.
Right, that's how to bypass. I'm thinking about the root cause ;-)

>> Jan any reason you opted to address only one of the LLVM 3.9 builds?
>> Should we bother with the rest, set it globally, other?
> the other builds did not need it. I only hit it when linking to static
> clang libraries (for whatever reason it decided to use static
> libraries). I assume you started hitting this when you switched
> enable_llvm_shared_libs off by default?
Yes, anything LLVM (project) related that is static linked exhibits the problem.

Issue is restricted to 3.9, so I seriously suspect something fishy in
the code or package.


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