Use cmake for SDL, add more X11 dependencies

scripts.d/45-x11/50-libxi.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+LIBXI_REPO="https://gitlab.freedesktop.org/xorg/lib/libxi.git"
+LIBXI_COMMIT="f24d7f43ab4d97203e60677a3d42e11dbc80c8b4"
+
+ffbuild_enabled() {
+    [[ $TARGET != linux* ]] && return -1
+    return 0
+}
+
+ffbuild_dockerbuild() {
+    git-mini-clone "$LIBXI_REPO" "$LIBXI_COMMIT" libxi
+    cd libxi
+
+    autoreconf -i
+
+    local myconf=(
+        --prefix="$FFBUILD_PREFIX"
+        --disable-shared
+        --enable-static
+        --with-pic
+    )
+
+    if [[ $TARGET == linux* ]]; then
+        myconf+=(
+            --host="$FFBUILD_TOOLCHAIN"
+        )
+    else
+        echo "Unknown target"
+        return -1
+    fi
+
+    ./configure "${myconf[@]}"
+    make -j$(nproc)
+    make install
+}