x86_64bit/Weston/Wayland/Buildroot

Buildroot

Enable Mesa3d/EGL/Weston etc 

 BR2_TOOLCHAIN_BUILDROOT_CXX=y
+BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_EUDEV=y 
 BR2_SYSTEM_DHCP="eth0"
 BR2_LINUX_KERNEL=y
@@ -10,11 +11,18 @@ BR2_LINUX_KERNEL_CUSTOM_REPO_URL="$(TOPDIR)/../linux-stable"
 BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="v4.4"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux-4.4.config"
+BR2_PACKAGE_KMSCUBE=y
+BR2_PACKAGE_MESA3D=y
+BR2_PACKAGE_MESA3D_GALLIUM_DRIVER_VIRGL=y
+BR2_PACKAGE_MESA3D_DRI_DRIVER_SWRAST=y
+BR2_PACKAGE_MESA3D_OPENGL_ES=y
+BR2_PACKAGE_WESTON=y
+BR2_PACKAGE_WESTON_DEMO_CLIENTS=y
+BR2_PACKAGE_LIBDRM_INSTALL_TESTS=y

qemu-system-x86_64 --cpu  host   -m 2096m   -kernel output/images/bzImage -drive file=output/images/rootfs.ext2,if=virtio,format=raw -append "console=ttyS0  root=/dev/vda" -net nic,model=virtio   -enable-kvm  -vga std  -net user  -serial `tty`   --enable-kvm      -monitor  /dev/null

 Note

1. GALLIUM_DRIVER_SWRAST, keep DRI_DRIVER_SWRAST

   New Mesa3d 20.x should use GALLIUM_DRIVER_SWRAST

2. use -vga std (qemu Bosch standard VGA)

3. Weston test with fbdev

4.  $mkdir /tmp/wayland  ;  chmod 0700 /tmp/wayland ;
      $XDG_RUNTIME_DIR=/tmp/wayland  weston    --tty=1 &
      $XDG_RUNTIME_DIR=/tmp/wayland   weston-terminal

5. weston with DRM

+BR2_PACKAGE_WESTON=y
+BR2_PACKAGE_WESTON_DEFAULT_DRM=y
+BR2_PACKAGE_WESTON_FBDEV=y