I'm using Slackware 13.1, just messing around with some stuff before I upgrade to 13.37. I really want to get a decent build of Desmume working, but the 3D engine for it requires OSMesa to be enabled. I've removed the initial Mesa package that I installed from the Slackware DVD and I'm trying to recompile mesa-7.8.1 so that OSMesa is available for the system. However, I keep running into problems.

When I run those options for the configure command and compile it, Mesa builds alright and gives me a working libGL just fine. It also gives me libOSMesa. Yet, when I compile Desmume to specifically use OSMesa, its configure script says that it can't find OSMesa at all. But running ldconfig -p, the output shows libOSMesa.so in /usr/lib. The symlink is up to date too, and I've recreated it several times.

When I build Mesa using these configure options, I don't get libGL (well, that's expected, the manual says as much will happen). But apparently libOSMesa is installed just fine. When I went to compile Desmume, no gripes about OSMesa, but Desmume needs both libGL and OSMesa to work properly.

So my question is, how can I install Mesa so that I have OpenGL and OSMesa working together? I've been able to get one working, but not both. I don't know how to get OpenGL on Slackware without using the Mesa package, but the package isn't cooperating. I'm on Intel graphics too. Thanks for any help.

Mesa uses libs that are installed. When you configure --with-something, often it checks for the package in /usr/lib(64)/pkgconfig. If the docs say osmesa or gl, that's probably it. Your next option would be forking the package. And remember, tricking the build system doesn't necessarily trick the code! Recent speed increase have concentrated development around certain formats and you wander away at your loss really.

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Building the libOSMesa.so.x + libGL.. seems to be a two stage action.

Please have a look into the file mesa.spec :
http://download.fedora.redhat.com/pu...6.fc13.src.rpm


I.e. first build the OSMesa stuff, then 'make clean', and configure
for the other files.

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Thanks business_kid and knudfl, you two have been a great help! Everything seems to be working now. As was said, Mesa building depends on currently installed libs, and the solution was indeed to do the building in two stages. In my case, I'm actually messing around with the Slackbuilds to get the configuration and compiling done. I basically created two Slackware packages: one for libGL and one for libOSMesa. Desmume built just fine with OSMesa support too, but I didn't get as much of a performance boost as I had expected. Oh well. Again, thanks for the help!