Hi Lisandro, On Mon, Mar 24, 2014 at 03:10:25PM -0300, Lisandro Damián Nicanor Pérez Meyer wrote: > Hi! I'm trying to find a solution for the FTBFS of qantenna on arm* [0][1] > that fits the best to everyone. This issue seems to be very similar to a older > thread "including both GL/gl.h and cogl/cogl.h fails on armel and armhf" [2], > but I failed to see how that was resolved. > The FTBFSs are due to conflicting declarations for GLdouble, GLsizeiptr and > GLintptr. > Basically the problem might boild down to the fact that Qt5 is built using es2 > instead of the "desktop" opengl which, to the best of my knowledge, it's > standard OpenGL 2.0. > These are the possible solutions I think could be taken: > a) Switch Qt5 to use "desktop" OpenGL on arm*. I have tested this on > harris.d.o and works OK. As a pro, it means that other apps will not have > porting issues like this. As a con, it might mean that all the OpenGL stuff > will be done by software though, am I correct? Correct. It is rare to find accelerated OpenGL drivers for ARM; almost all the drivers out there, particularly for recent hardware, will be GLES2 instead. This means that any reasonably GL-intensive app is going to be unusable, particularly on armel. FWIW, in Ubuntu not only is Qt built for GLES2 on armhf, we are also looking at making a GLES2 build of Qt available on x86 - because for the mobile sector, regardless of architecture, GLES2 is the relevant standard that third-party drivers will be built to. I don't think it makes sense to build Qt for OpenGL on arm. > b) (supossing it's possible) provide es2 versions of mesa-common-dev, libglu1- > mesa-dev et al. and build against that on arm* Not really possible. GLU depends on GL, not GLES2. In theory it could be ported, but this has not been done AFAIK. > d) (also supossing it's possible) do not consider the FTBFS not RC (or allow > it's transition even if it's RC) until a better fix could be done. The way to address this is to ask for the old arm binaries to be removed from the archive, via a bug report against ftp.debian.org, with the explanation that qantenna is not supported on GLES2 architectures. This is a perfectly reasonable thing to do under the circumstances. Particularly given that qantenna has always required GLU, and is unsupportable now because GLU is not usable with Qt5 on arm*, I think this is the right thing to do. -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slangasek@ubuntu.com vorlon@debian.org
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