Update 'linux rasp pi4 X11 EGLFS'

linux-rasp-pi4-X11-EGLFS.md

@@ -46,3 +46,31 @@ Add this to [Service] tab in systemd file
 After=multi-user.target
 ```
 
+## Note
+In the last attemp, installing all the packages above didn't worked.
+I Had to do every step like EGLFS2 guide but added
+```
+sudo apt install libgbm-dev libdrm-dev
+```
+I also built Qt5.12.11 with gcc7.2 using following configuration:
+
+```
+../configure -release -opengl es2 -make libs -nomake tests -nomake examples -skip wayland -skip qtscript -skip qtwebengine -skip location -device linux-rasp-pi3-vc4-g++ -device-option CROSS_COMPILE=/media/mehran/extra3/Qt5Pi4X11/raspi/rpi-gcc-8.3.0/bin/arm-linux-gnueabihf- -sysroot /media/mehran/extra3/Qt5Pi4X11/raspi/sysroot -opensource -confirm-license -make libs -prefix /usr/local/qt5pi -extprefix /media/mehran/extra3/Qt5Pi4X11/raspi/qt5pi -hostprefix /media/mehran/extra3/Qt5Pi4X11/raspi/qt5 -v -no-use-gold-linker
+```
+
+Configuration output is like this:
+```
+ EGLFS .................................. yes
+  EGLFS details:
+    EGLFS OpenWFD ........................ no
+    EGLFS i.Mx6 .......................... no
+    EGLFS i.Mx6 Wayland .................. no
+    EGLFS RCAR ........................... no
+    EGLFS EGLDevice ...................... yes
+    EGLFS GBM ............................ yes
+    EGLFS VSP2 ........................... no
+    EGLFS Mali ........................... no
+    EGLFS Raspberry Pi ................... no
+    EGLFS X11 ............................ yes
+```
+