##System Requirements
Ubuntu 14.04 LTS, (Ubuntu 14.10 needed for DRI 3 demos)
+```
sudo apt-get install git subversion cmake libgl1-mesa-dev freeglut3-dev libglm-dev libpng12-dev
sudo apt-get build-dep mesa
+```
##Build
The standard build process builds the icd, the icd loader and all the tests.
Example debug build:
+```
cd xgl # cd to the root of the xgl git repository
export KHRONOS_ACCOUNT_NAME= <subversion login name for svn checkout of BIL>
./update_external_sources.sh # fetches and builds glslang, llvm, LunarGLASS, and BIL
cmake -H. -Bdbuild -DCMAKE_BUILD_TYPE=Debug
cd dbuild
make
+```
To run XGL programs you must tell the icd loader where to find the libraries. Set the
environment variable LIBXGL_DRIVERS_PATH to the driver path. For example:
+```
export LIBXGL_DRIVERS_PATH=$PWD/icd/intel
+```
##Test
The system will need to be rebooted with these files in place to complete initialization.
These commands will create the config files.
+```
sudo tee /etc/modprobe.d/drm.conf << EOF
-'# Enable render nodes
+# Enable render nodes
options drm rnodes=1
EOF
sudo tee /etc/udev/rules.d/drm.rules << EOF
-'# Add permissions to render nodes
+# Add permissions to render nodes
SUBSYSTEM=="drm", ACTION=="add", DEVPATH=="/devices/*/renderD*", MODE="020666"
EOF
-
+```