[LLVMdev] [PATCH 0/2 v3] add visibility hidden to tls entry points

[Marc Dietrich]

Am Mittwoch, 25. Februar 2015, 17:49:28 schrieb Sedat Dilek:
> On Fri, Feb 20, 2015 at 1:45 PM, Sedat Dilek <sedat.dilek at gmail.com> wrote:
> > On Tue, Feb 17, 2015 at 1:55 PM, Sedat Dilek <sedat.dilek at gmail.com> 
wrote:
> >> On Tue, Feb 17, 2015 at 10:40 AM, Marc Dietrich <marvin24 at gmx.de> wrote:
> >>> Patch 1 adds a check for the compilers visibility macro to configure.ac.
> >>> Patch 2 avoids redefined symbol errors in clang of the tls entry points.
> >>> Based on a suggestion from Rafael Ávila de Espíndola
> >>> <rafael.espindola at gmail.com> in
> >>> http://llvm.org/bugs/show_bug.cgi?id=19778.
> >>> 
> >>> Tested with gcc 4.9 and clang 3.6(rc)
> >>> 
> >>> Marc Dietrich (2):
> >>>   configure: add visibility macro detection to configure
> >>>   add visibility hidden to tls entry points
> >>>  
> >>>  configure.ac                | 28 ++++++----------------------
> >>>  src/mapi/Makefile.am        |  1 +
> >>>  src/mapi/entry_x86-64_tls.h |  4 ++--
> >>>  src/mapi/entry_x86_tls.h    |  5 +++--
> >>>  src/mapi/entry_x86_tsd.h    |  5 +++--
> >>>  src/util/macros.h           |  6 ++++++
> >>>  6 files changed, 21 insertions(+), 28 deletions(-)
> >> 
> >> Tested-by: Sedat Dilek <sedat.dilek at gmail.com> (mesa v10.4.4 with
> >> llvm-toolchain v3.6.0rc2)
> > 
> > Tested-by: Sedat Dilek <sedat.dilek at gmail.com> (mesa v10.4.4 with
> > llvm-toolchain v3.6.0rc*3* with compiler-rt)
> > 
> > I re-compiled my Linux graphics driver stack with a self-compiled
> > llvm-toolchain v3.6.0rc3.
> > 
> > libdrm: v2.4.59
> > mesa: v10.4.4 (plus gallivm-fixes and visibility-macro-detection
> > support) + configure: --enable-glx-tls
> > intel-ddx: v2.99.917-149-g09b0ab9b4384
> > 
> > What about renaming your patches to...?
> > 
> > 1/2: "configure: add visibility macro detection"
> > 2/2: "mapi: add visibility hidden to tls entry points"
> > 
> > Even 1/2 should reflect it's a code-generation option for compilers
> > like GCC or LLVM/Clang.
> > It's up2u.
> > Please have a look at [1], too.
> > 
> > Thanks.
> > 
> > - Sedat -
> > 
> > [1] https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html ->
> > "-fvisibility=[default|internal|hidden|protected]"
> 
> Ping!?

I'm actually waiting for Matt for a decission on the alternative solution. See 
[1]. If you like, you could they the solution mentioned there, as it would be 
cleaner than just "hiding" the problem.

Marc

[1] https://www.mail-archive.com/mesa-dev@lists.freedesktop.org/msg76122.html



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