[vlc-devel] Regarding building of VLC using clang/LLVM on Linux/Ubuntu

[Raghavan Santhanam]

Those fat fingers.. eh..

I found the resolution for this segfault/crash BN - I was able to build VLC
using *clang/LLVM*  on
my *Ubuntu 17.10 x86_64*. The fix was to use the latest *protobuf v3.5.10*
instead of the default Ubuntu repo's
protobuf v3.0.0, specifically, libprotobuf-lite.so was the FN place where
the crash/segfault was happening within its
*google::protobuf::ShutdownProtobufLibrary()*. Will send out the details of
thus successful clang-build of VLC.
I know that this protobuf issue is not specific to clang-usage, but since
that was a roadblock while building VLC
even when using clang/LLVM instead of GCC, I am associating it with my
clang/VLC effort.

- Raghavan Santhanam

On Sun, Mar 25, 2018 at 6:52 AM, Rémi Denis-Courmont <remi at remlab.net>
wrote:

> Le 25 mars 2018 20:42:39 GMT+08:00, Raghavan Santhanam <
> raghavanil4m at gmail.com> a écrit :
> >What is BN, that you mentioned in your first reply? It looks like
> >there's
> >already an open VLC bug for this :
> >https://trac.videolan.org/vlc/ticket/18329.
> >Yes, I understood that the issues was with something else - same case
> >with
> >GCC. I am trying to resolve this issue in general.
> >
> >On Sun, Mar 25, 2018 at 5:20 AM, Rémi Denis-Courmont <remi at remlab.net>
> >wrote:
> >
> >> Le 25 mars 2018 20:16:54 GMT+08:00, Raghavan Santhanam <
> >> raghavanil4m at gmail.com> a écrit :
> >> >Hello,
> >> >
> >> >OK, I am trying to build VLC using clang/LLVM on Ubuntu with
> >necessary
> >> >environment variables for library
> >> >dependencies, etc. But, the make command is failing with a segfault
> >> >while
> >> >it reaches "vlc-cache-gen" specific
> >> >command and that doesn't change even after updating Intel microcode,
> >> >reboot, etc. So, wanted to know
> >> >the status for Linux/Ubuntu. I saw some reports of clang/VLC
> >> >compatibility.
> >> >BTW, what is BN?!
> >> >
> >> >- Raghavan
> >> >
> >> >2018-03-25 4:35 GMT-07:00 Rémi Denis-Courmont <remi at remlab.net>:
> >> >
> >> >> Hi,
> >> >>
> >> >> VLC is built using clang on several platforms BN already. I can't
> >> >comment
> >> >> on your specific combination.
> >> >> --
> >> >> Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez
> >> >excuser ma
> >> >> brièveté.
> >> >>
> >>
> >> That sounds like a bug in an underlying library with no relationship
> >to
> >> the compiler. Does it work any better with GCC?
> >> --
> >> Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez
> >excuser ma
> >> brièveté.
> >>
>
> It was a trivial case of fat fingers.
>
> I believe the linked bug already answers your question. Since this is a
> problem with protobuf and triggered by Mir, there are no clean fixes within
> VLC.
> --
> Envoyé de mon appareil Android avec Courriel K-9 Mail. Veuillez excuser ma
> brièveté.
>
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