Switch to Xenial for Releases (#29) (Fix #25)

scripts/build-sdl2.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+cd $(dirname "${BASH_SOURCE[0]}")/..
+ROOT="`pwd`"
+
+URL=https://www.libsdl.org/release/SDL2-2.0.10.tar.gz
+FILE=SDL2-2.0.10.tar.gz
+DIR=SDL2-2.0.10
+
+if [ ! -d "$DIR" ]; then
+	wget "$URL" || exit 1
+	tar -xf "$FILE" || exit 1
+fi
+
+cd "$DIR" || exit 1
+
+mkdir -p build && cd build || exit 1
+cmake \
+	-DCMAKE_INSTALL_PREFIX="$ROOT/sdl2-prefix" \
+	-DSDL_ATOMIC=OFF \
+	-DSDL_AUDIO=OFF \
+	-DSDL_CPUINFO=OFF \
+	-DSDL_EVENTS=ON \
+	-DSDL_FILE=OFF \
+	-DSDL_FILESYSTEM=OFF \
+	-DSDL_HAPTIC=ON \
+	-DSDL_JOYSTICK=ON \
+	-DSDL_LOADSO=OFF \
+	-DSDL_RENDER=OFF \
+	-DSDL_SHARED=ON \
+	-DSDL_STATIC=OFF \
+	-DSDL_TEST=OFF \
+	-DSDL_THREADS=ON \
+	-DSDL_TIMERS=OFF \
+	-DSDL_VIDEO=OFF \
+	.. || exit 1
+# SDL_THREADS is not needed, but it doesn't compile without
+
+make -j4 || exit 1
+make install || exit 1
+