Added a README file regarding WinRT support

To note, this file is currently formatted with CRLF line endings, rather than
LF, to allow the file to be viewed with Notepad.

build-scripts/raspberrypi-buildbot.sh

@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# This is the script buildbot.libsdl.org uses to cross-compile SDL2 from
+#  x86 Linux to Raspberry Pi.
+
+# The final tarball can be unpacked in the root directory of a RPi,
+#  so the SDL2 install lands in /usr/local. Run ldconfig, and then
+#  you should be able to build and run SDL2-based software on your
+#  Pi. Standard configure scripts should be able to find SDL and
+#  build against it, and sdl2-config should work correctly on the
+#  actual device.
+
+TARBALL="$1"
+if [ -z $1 ]; then
+    TARBALL=sdl-raspberrypi.tar.xz
+fi
+
+OSTYPE=`uname -s`
+if [ "$OSTYPE" != "Linux" ]; then
+    # !!! FIXME
+    echo "This only works on x86 or x64-64 Linux at the moment." 1>&2
+    exit 1
+fi
+
+if [ "x$MAKE" == "x" ]; then
+    NCPU=`cat /proc/cpuinfo |grep vendor_id |wc -l`
+    let NCPU=$NCPU+1
+    MAKE="make -j$NCPU"
+fi
+
+BUILDBOTDIR="raspberrypi-buildbot"
+PARENTDIR="$PWD"
+
+set -e
+set -x
+rm -f $TARBALL
+rm -rf $BUILDBOTDIR
+mkdir -p $BUILDBOTDIR
+pushd $BUILDBOTDIR
+
+SYSROOT="/opt/rpi-sysroot"
+export CC="ccache /opt/rpi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc --sysroot=$SYSROOT -I$SYSROOT/opt/vc/include -I$SYSROOT/usr/include -I$SYSROOT/opt/vc/include/interface/vcos/pthreads -I$SYSROOT/opt/vc/include/interface/vmcs_host/linux -L$SYSROOT/opt/vc/lib"
+# -L$SYSROOT/usr/lib/arm-linux-gnueabihf"
+# !!! FIXME: shouldn't have to --disable-* things here.
+../configure --with-sysroot=$SYSROOT --host=arm-raspberry-linux-gnueabihf --prefix=$PWD/rpi-sdl2-installed --disable-pulseaudio --disable-esd --disable-video-mir
+$MAKE
+$MAKE install
+# Fix up a few things to a real install path on a real Raspberry Pi...
+perl -w -pi -e "s#$PWD/rpi-sdl2-installed#/usr/local#g;" ./rpi-sdl2-installed/lib/libSDL2.la ./rpi-sdl2-installed/lib/pkgconfig/sdl2.pc ./rpi-sdl2-installed/bin/sdl2-config
+mkdir -p ./usr
+mv ./rpi-sdl2-installed ./usr/local
+
+popd
+tar -cJvvf $TARBALL -C $BUILDBOTDIR usr
+rm -rf $BUILDBOTDIR
+
+set +x
+echo "All done. Final installable is in $TARBALL ...";
+
+