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diff --git a/games/xroar/README b/games/xroar/README
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--- a/games/xroar/README
+++ b/games/xroar/README
@@ -7,16 +7,18 @@ Tandy Colour Computer (CoCo) models 1 & 2.
Optional dependenies:
gtkglext - if you want a full GTK+ user interface, install gtkglext
- before building xroar.
+ before building xroar. If gtkglext is installed, you can build
+ without it by setting GTKGLEXT=no in the environment.
jack-audio-connection-kit - if you want to use JACK for audio output,
- install jack-audio-connection-kit and set JACK=yes in the
- environment before building xroar. If JACK audio has x-runs,
- try 'setcap cap_ipc_lock,cap_sys_nice=ep /usr/bin/xroar'.
+ install jack-audio-connection-kit and set JACK=yes in the
+ environment before building xroar. If JACK audio has x-runs,
+ try 'setcap cap_ipc_lock,cap_sys_nice=ep /usr/bin/xroar'.
SDL2 - if you prefer SDL2 to SDL1, install SDL2 before building xroar.
- I haven't noticed any difference between xroar built with SDL1 or
- SDL2, but the option is there in case you need it.
+ I haven't noticed any difference between xroar built with SDL1 or SDL2,
+ but the option is there in case you need it. If SDL2 is installed,
+ you can build without it by setting SDL2=no in the environment.
To usefully emulate the Dragon or CoCo, you will need the images of
the system ROMs for the target system. The ROM images must be copied to