Monday, 19 October 2015

Re: libqt4-opengl-dev: Different dependencies on armhf than on other architectures / Licheng Ma

>Andreas Moog <andreas.moog at> wrote: >>Hi there, >> >>I have a question about the package libqt4-opengl-dev on the armhf >>architecture (source: qt4-x11). I was investigating >>, a build failure of the package >>fracplanet and was wondering why it succeeded on all other arches as >>well as on armhf in Debian. >> >>The difference I found was in the dependencies of libqt4-opengl-dev: >> >>On amd64 (and others) it is: >> >>Depends: libgl1-mesa-dev | libgl-dev, libglu1-mesa-dev | libglu-dev, >>libqt4-dev (= 4:4.8.4+dfsg-0ubuntu19), libqt4-opengl (= >>4:4.8.4+dfsg-0ubuntu19) >> >>But on armhf in Ubuntu (NOT in Debian): >> >>Depends: libgles2-mesa-dev | libgles2-dev, libqt4-dev (= >>4:4.8.4+dfsg-0ubuntu19), libqt4-opengl (= 4:4.8.4+dfsg-0ubuntu19) >> >>Is there a reason for this difference? How would I go to further find >>out why this is what it is? > >In Ubuntu we only support GLES on arm for performance reasons. This is an intentional difference with Debian. > >Scott K 
Hi there I just found out that on aarch (ARM64) libqt4-opengl-dev is using libgl1-mesa-dev again instead of libgles2-mesa-dev, as I would expected, like in armhf. Tested in Ubuntu 15.04 on a Tegra X1 system.
Does this (Difference in GLES support on aarch64 and armhf) have a reason? How can I solve this issue, regarding the fact that I use GLES based source code and on Tegra X1 only GLES libraries exist?

Licheng Ma