Add libgme

Closes #32

scripts.d/50-gme.sh

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+GME_REPO="https://bitbucket.org/mpyne/game-music-emu.git"
+GME_COMMIT="013d4676c689dc49f363f99dcfb8b88f22278236"
+
+ffbuild_enabled() {
+    return 0
+}
+
+ffbuild_dockerstage() {
+    to_df "ADD $SELF /stage.sh"
+    to_df "RUN run_stage"
+}
+
+ffbuild_dockerbuild() {
+    git-mini-clone "$GME_REPO" "$GME_COMMIT" gme
+    cd gme
+
+    mkdir build && cd build
+
+    cmake -DCMAKE_TOOLCHAIN_FILE="$FFBUILD_CMAKE_TOOLCHAIN" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX="$FFBUILD_PREFIX" -DBUILD_SHARED_LIBS=OFF -DENABLE_UBSAN=OFF ..
+    make -j$(nproc)
+    make install
+
+    cd ../..
+    rm -rf gme
+}
+
+ffbuild_configure() {
+    echo --enable-libgme
+}
+
+ffbuild_unconfigure() {
+    echo --disable-libgme
+}