Linux

By default SDL will only link against glibc, the rest of the features will be enabled dynamically at runtime depending on the available features on the target system. So, for example if you built SDL with Xinerama support and the target system does not have the Xinerama libraries installed, it will be disabled at runtime, and you won't get a missing library error, at least with the default configuration parameters.

================================================================================ Build Dependencies

Ubuntu 20.04, all available features enabled:

sudo apt-get install build-essential mercurial make cmake autoconf automake
libtool libasound2-dev libpulse-dev libaudio-dev libx11-dev libxext-dev
libxrandr-dev libxcursor-dev libxi-dev libxinerama-dev libxxf86vm-dev
libxss-dev libgl1-mesa-dev libdbus-1-dev libudev-dev libgles2-mesa-dev
libegl1-mesa-dev libibus-1.0-dev fcitx-libs-dev libsamplerate0-dev
libsndio-dev libwayland-dev libxkbcommon-dev

NOTES:

• This includes all the audio targets except arts and esd, because Ubuntu (and/or Debian) pulled their packages, but in theory SDL still supports them.
• libsamplerate0-dev lets SDL optionally link to libresamplerate at runtime for higher-quality audio resampling. SDL will work without it if the library is missing, so it‘s safe to build in support even if the end user doesn’t have this library installed.
• DirectFB isn't included because the configure script (currently) fails to find it at all. You can do “sudo apt-get install libdirectfb-dev” and fix the configure script to include DirectFB support. Send patches. :)

================================================================================ Joystick does not work

If you compiled or are using a version of SDL with udev support (and you should!) there's a few issues that may cause SDL to fail to detect your joystick. To debug this, start by installing the evtest utility. On Ubuntu/Debian:

sudo apt-get install evtest

Then run:

sudo evtest

You'll hopefully see your joystick listed along with a name like “/dev/input/eventXX” Now run:

cat /dev/input/event/XX

If you get a permission error, you need to set a udev rule to change the mode of your device (see below)

Also, try:

sudo udevadm info --query=all --name=input/eventXX

If you see a line stating ID_INPUT_JOYSTICK=1, great, if you don't see it, you need to set up an udev rule to force this variable.

A combined rule for the Saitek Pro Flight Rudder Pedals to fix both issues looks like:

SUBSYSTEM==“input”, ATTRS{idProduct}==“0763”, ATTRS{idVendor}==“06a3”, MODE=“0666”, ENV{ID_INPUT_JOYSTICK}=“1” SUBSYSTEM==“input”, ATTRS{idProduct}==“0764”, ATTRS{idVendor}==“06a3”, MODE=“0666”, ENV{ID_INPUT_JOYSTICK}=“1”

You can set up similar rules for your device by changing the values listed in idProduct and idVendor. To obtain these values, try:

sudo udevadm info -a --name=input/eventXX | grep idVendor
sudo udevadm info -a --name=input/eventXX | grep idProduct

If multiple values come up for each of these, the one you want is the first one of each.

On other systems which ship with an older udev (such as CentOS), you may need to set up a rule such as:

SUBSYSTEM=="input", ENV{ID_CLASS}=="joystick", ENV{ID_INPUT_JOYSTICK}="1"