Single shell script to install the Mesa Vulkan driver for Raspberry Pi 4.

Tested on Linux rpi4 5.10.63-v8+ aarch64.

The latest version of libdrm (currently 2.4.110) seems to now be a required dependency. Refer to this excellent PR comment for more info.

1. Clone / copy / download script
2. Set as executable and run

Pass --help to print usage.

install_vulkan.sh [install[=~/mesa_vulkan]] [config[=release]] [src[=mesa]] 
	[build[=build/$config]] [script[=vk_icd.sh]]

1. install: where to install built Vulkan drivers
2. config: build configuration
3. src: where to clone the mesa repository
4. build: where to build Vulkan drivers
5. script: name of source-able script to generate to set up an environment via installed drivers

1. Source the generated script into the shell environment: . vk_icd.sh
2. Run vkconfig to confirm driver / loader / ICD / etc work as expected
3. Run desired Vulkan applications, eg vkcube