Packaging: Add scripts to include libc/libstdc++ in AppImage

scripts/packaging/appimage/inject-libc-apprun.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+REQUIRED_GLIBC_VERSION="__REQ_GLIBC_VERSION__"
+
+this_dir="$(readlink -f "$(dirname "$0")")"
+
+APPBIN="${this_dir}/usr/bin/__APPNAME__"
+RUNTIME_DIR="${this_dir}/libc-runtime"
+LOADER_BIN="${this_dir}/usr/bin/ld-linux"
+
+GLIBC_VERSION=$(ldd --version | head -1 | sed -e 's/.* \([0-9.]\)/\1/')
+
+echo "Detected glibc version ${GLIBC_VERSION}."
+
+if [[ -z "${GLIBC_VERSION}" || ! "${GLIBC_VERSION}" < "${REQUIRED_GLIBC_VERSION}" ]]; then
+	echo "Using system libc/libstdc++."
+	exec "${APPBIN}" "$@"
+fi
+
+
+echo "Using bundled libc/libstdc++ from ${RUNTIME_DIR}."
+if [ -z "$LD_LIBRARY_PATH" ]; then
+	export LD_LIBRARY_PATH="${RUNTIME_DIR}"
+else
+	export LD_LIBRARY_PATH="${RUNTIME_DIR}:${LD_LIBRARY_PATH}"
+fi
+
+exec "${LOADER_BIN}" "${APPBIN}" "$@"
+

scripts/packaging/appimage/inject-libc.sh

@@ -0,0 +1,81 @@
+#!/usr/bin/env bash
+
+set -e
+
+function retry_command {
+  # Package servers tend to be unreliable at times..
+  # Retry a bunch of times.
+  local RETRIES=10
+
+  for i in $(seq 1 "$RETRIES"); do
+    "$@" && break
+    if [ "$i" == "$RETRIES" ]; then
+      echo "Command \"$@\" failed after ${RETRIES} retries."
+      exit 1
+    fi
+  done
+}
+
+this_dir="$(readlink -f "$(dirname "$0")")"
+
+if [ "$#" -ne 5 ]; then
+	echo "Syntax: $0 <path to AppDir> <.deb arch> <triple> <ubuntu mirror> <binary to run>"
+	echo "e.g. $0 DuckStation.AppDir amd64 x86_64-linux-gnu https://archive.ubuntu.com/ubuntu/ duckstation-qt"
+	exit 1
+fi
+
+
+APPDIR=$1
+DEBARCH=$2
+TRIPLE=$3
+MIRROR=$4
+APPNAME=$5
+
+LIBC_PACKAGE_URL="${MIRROR}/pool/main/g/glibc/libc6_2.35-0ubuntu3.8_${DEBARCH}.deb"
+LIBGCCS_PACKAGE_URL="${MIRROR}/pool/main/g/gcc-12/libgcc-s1_12.3.0-1ubuntu1~22.04_${DEBARCH}.deb"
+LIBSTDCXX_PACKAGE_URL="${MIRROR}/pool/main/g/gcc-12/libstdc++6_12.3.0-1ubuntu1~22.04_${DEBARCH}.deb"
+GLIBC_VERSION=2.35
+
+mkdir "temp"
+cd "temp"
+retry_command wget -O "libc.deb" "${LIBC_PACKAGE_URL}"
+retry_command wget -O "libgccs.deb" "${LIBGCCS_PACKAGE_URL}"
+retry_command wget -O "libstdc++.deb" "${LIBSTDCXX_PACKAGE_URL}"
+dpkg -x "libc.deb" .
+dpkg -x "libgccs.deb" .
+dpkg -x "libstdc++.deb" .
+
+# Copy everything into AppDir
+RUNTIME="${APPDIR}/libc-runtime"
+mkdir -p "${RUNTIME}"
+
+# libc.so.6 and friends
+cd "lib/${TRIPLE}"
+cp -v * "${RUNTIME}"
+cd ../../
+
+# libstdc++
+cd "usr/lib/${TRIPLE}"
+cp -v * "${RUNTIME}" || true
+cd ../../..
+
+# done with temps now
+cd ..
+rm -fr temp
+
+# Not risking mixing resolvers...
+cd "${RUNTIME}"
+rm -vf libnss_*
+
+# Move ld-linux.so.2 into the binary directory so we can preserve arg0's directory
+mv -v "ld-linux-"*.so.2 "${APPDIR}/usr/bin/ld-linux"
+
+# Set up the replacement apprun script
+cd "${APPDIR}"
+rm -f AppRun.wrapped
+cp "${this_dir}/inject-libc-apprun.sh" AppRun.wrapped
+sed -i -e "s/__APPNAME__/${APPNAME}/" AppRun.wrapped
+sed -i -e "s/__REQ_GLIBC_VERSION__/${GLIBC_VERSION}/" AppRun.wrapped
+
+echo Done.
+