release: use old bullseye container for release build

release/Dockerfile

@@ -1,18 +1,55 @@
-FROM debian:trixie-slim
+# Build releases with the oldest possible supported target
+# The built binaries will depend on symbols from the libc used here,
+# so this should work on newer OS but might not work on older OS
+
+# Recommended version should be kept in sync with the wiki:
+# https://github.com/flutter-elinux/flutter-elinux/wiki/flutter-elinux-install
+FROM debian:bullseye-slim
 
 ENV DEBIAN_FRONTEND noninteractive
 
 RUN <<EOF
 dpkg --add-architecture arm64
+
 apt-get update
 apt-get -y -q upgrade
-apt-get -y install                \
-       crossbuild-essential-arm64        \
-       cmake                             \
-       git                          \
-       xxhash                       \
-       curl xz-utils build-essential pkgconf \
-       zip equivs clang libgles2-mesa-dev wayland-protocols libegl1-mesa-dev libdrm-dev libgbm-dev libinput-dev libudev-dev libsystemd-dev libxkbcommon-dev libwayland-dev  \
-       libgles2-mesa-dev:arm64 wayland-protocols:arm64 libegl1-mesa-dev:arm64 libdrm-dev:arm64 libgbm-dev:arm64 libinput-dev:arm64 libudev-dev:arm64 libsystemd-dev:arm64 libxkbcommon-dev:arm64 libwayland-dev:arm64 libuv1-dev:arm64
+
+apt-get -y install			\
+	build-essential			\
+	clang				\
+	cmake				\
+	crossbuild-essential-arm64	\
+	curl				\
+	equivs				\
+	git				\
+	libdrm-dev			\
+	libdrm-dev:arm64		\
+	libegl1-mesa-dev		\
+	libegl1-mesa-dev:arm64		\
+	libgbm-dev			\
+	libgbm-dev:arm64		\
+	libgles2-mesa-dev		\
+	libgles2-mesa-dev:arm64		\
+	libinput-dev			\
+	libinput-dev:arm64		\
+	libsystemd-dev			\
+	libsystemd-dev:arm64		\
+	libudev-dev			\
+	libudev-dev:arm64		\
+	libuv1-dev:arm64		\
+	libwayland-dev			\
+	libwayland-dev:arm64		\
+	libxkbcommon-dev		\
+	libxkbcommon-dev:arm64		\
+	pkgconf				\
+	wayland-protocols		\
+	wayland-protocols:arm64		\
+	xxhash				\
+	xz-utils			\
+	zip
+
+# not needed for trixie
+apt-get -y install libstdc++-10-dev:arm64
+
 apt-get clean
 EOF

release/README.md

@@ -6,10 +6,7 @@ To run with docker:
 # build container
 docker build -t flutter-build .
 # build flutter engine and flutter-elinux variants
-docker run -ti --rm --user "$(id -u):$(id -g)" \
-    -v "$PWD":/flutter -w /flutter \
-    --env HOME=/flutter/home flutter-build \
-    ./build-all.sh [build-all options]
+./run-docker.sh ./build-all.sh [build-all options]
 # check build is complete and output instructions to make release
 ./prepare-release.sh output
 ```

release/run-docker.sh

@@ -1,6 +1,8 @@
+#!/bin/sh
+
 docker run -ti --rm \
 	--user "$(id -u):$(id -g)" \
 	-v "$PWD":/flutter \
 	-w /flutter \
 	--env HOME=/flutter/home \
-	flutter
+	flutter-build "$@"

src/flutter/shell/platform/linux_embedded/window/native_window_drm.cc

@@ -13,6 +13,13 @@
 #include "flutter/shell/platform/linux_embedded/logger.h"
 #include "flutter/shell/platform/linux_embedded/surface/cursor_data.h"
 
+// Allow building with mesa < 21
+// This is a linux uapi header value so there is no risk in hardcoding it if
+// unset
+#ifdef DRM_MODE_CONNECTOR_USB
+#define DRM_MODE_CONNECTOR_USB 20
+#endif
+
 namespace flutter {
 namespace {
 constexpr char kFlutterDrmConnectorEnvironmentKey[] = "FLUTTER_DRM_CONNECTOR";