Re: build failure, clock_gettime undefined, linking libavmedialo.so

On Friday, May 16, 2014 15:00 BST, Terrence Enger <tenger@iseries-guru.com> wrote:

> Zolnai,
>
> My build of commit 48eccfb, fetched around 2014-05-16 00:57 UTC, is
> failing with messages:
>
>     [build LNK] Library/libavmedialo.so
>     
> /home/terry/lo_hacking/git/libo2/workdir/LinkTarget/StaticLibrary/libcollada2gltf.a(GLTF-Open3DGC.o):
>  In function `o3dgc::Timer::Tic()':
>     
> /home/terry/lo_hacking/git/libo2/workdir/UnpackedTarball/collada2gltf/dependencies/o3dgc/src/o3dgc_common_lib/inc/o3dgcTimer.h:115:
>  undefined reference to `clock_gettime'
>     
> /home/terry/lo_hacking/git/libo2/workdir/LinkTarget/StaticLibrary/libcollada2gltf.a(GLTF-Open3DGC.o):
>  In function `o3dgc::Timer::Toc()':
>     
> /home/terry/lo_hacking/git/libo2/workdir/UnpackedTarball/collada2gltf/dependencies/o3dgc/src/o3dgc_common_lib/inc/o3dgcTimer.h:119:
>  undefined reference to `clock_gettime'
>
> I notice that the files downloaded by `make fetch` were:
>
>     collada2gltf-master-6258611a6a.tar.bz2
>     libpng-1.5.18.tar.gz
>     OpenCOLLADA-master-6509aa13af.tar.bz2
>
> If I am reading things correctly, the first of these was introduced
> by:
>
>     commit d575917016f65a7322817a8e13ec25c52d18a600
>     Author: Zolnai Tamás <tamas.zolnai@collabora.com>
>     Date:   Thu Apr 10 13:37:38 2014 +0200
>
>         Introduce Collada2gltf external library
>
>         Change-Id: I157f175ee6ea719e98ba45133f53cb4d2c3045bb
>
>
> Suggestions welcome.

Hi Terry,

I didn't get the same error while building.
I google it and find that:
http://stackoverflow.com/questions/2418157/ubuntu-linux-c-error-undefined-reference-to-clock-gettime-and-clock-settim
It suggests to link -lrt library.
So you can try to add these lines:
ifeq ($(OS),LINUX)
$(eval $(call gb_Library_add_libs,collada2gltf,\
        -lrt \
))
endif
to the external/collada2gltf/StaticLibrary_collada2gltf.mk file.

I hope it helps.

Best regards,
Tamás