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extra-build-config.md: Document DISABLE_VC4GRAPHICS

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Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
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Andrei Gherzan 2019-09-13 12:35:30 +01:00
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docs/extra-build-config.md
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@ -31,6 +31,10 @@ Accommodate the values above to your own needs (ex: ext3 / ext4).
See: <https://www.raspberrypi.org/documentation/configuration/config-txt/memory.md>
## VC4
By default, each machine uses `vc4` for graphics. This will in turn sets mesa as provider for `gl` libraries. `DISABLE_VC4GRAPHICS` can be set to `1` to disable this behaviour falling back to using `userland`. Be aware that `userland` has not support for 64-bit arch. If you disable `vc4` on a 64-bit Raspberry Pi machine, expect build breakage.
## Add purchased license codecs
To add you own licenses use variables `KEY_DECODE_MPG2` and `KEY_DECODE_WVC1` in