Native build 5.5.1 on RPI2: issue with qxcbeglwindow.cpp:85:81: error: invalid conversion

warpme

Hi,
I'm trying to natively build 5.5.1 on RPI2. My OS is ArchLinux ARM.
I'm using following configure:

PYTHON=/usr/bin/python2 ./configure -confirm-license -opensource \
    -prefix /usr \
    -bindir /usr/lib/qt/bin \
    -docdir /usr/share/doc/qt \
    -headerdir /usr/include/qt \
    -archdatadir /usr/lib/qt \
    -datadir /usr/share/qt \
    -sysconfdir /etc/xdg \
    -examplesdir /usr/share/doc/qt/examples \
    -plugin-sql-{psql,mysql,sqlite,odbc} \
    -system-sqlite \
    -openssl-linked \
    -nomake examples \
    -nomake tests \
    -no-rpath \
    -optimized-qmake \
    -system-harfbuzz \
    -no-use-gold-linker \
    -no-reduce-relocations \
    -no-sse2 \
    -no-sse3 \
    -no-ssse3 \
    -no-sse4.1 \
    -no-sse4.2 \
    -no-avx \
    -no-avx2 \
    -opengl es2 \
    -skip qtwebengine \
    -device linux-rasp-pi2-g++ \
    -device-option CROSS_COMPILE=/usr/bin/ \
    -force-pkg-config \
    -verbose \
    -eglfs

Configure reports following:

 Build parts ............ libs
  Mode ................... release
  Using sanitizer(s)...... none
  Using C++11 ............ yes
  Using gold linker....... no
  Using new DTAGS ........ yes
  Using PCH .............. yes
  Target compiler supports:
    Neon ................. yes

Qt modules and options:
  Qt D-Bus ............... yes (loading dbus-1 at runtime)
  Qt Concurrent .......... yes
  Qt GUI ................. yes
  Qt Widgets ............. yes
  Large File ............. yes
  QML debugging .......... yes
  Use system proxies ..... no

Support enabled for:
  Accessibility .......... yes
  ALSA ................... no
  CUPS ................... yes
  Evdev .................. yes
  FontConfig ............. yes
  FreeType ............... yes (system library)
  Glib ................... yes
  GStreamer .............. yes (0.10)
  GTK theme .............. no
  HarfBuzz ............... yes (system library)
  Iconv .................. yes
  ICU .................... yes
  Image formats: 
    GIF .................. yes (plugin, using bundled copy)
    JPEG ................. yes (plugin, using system library)
    PNG .................. yes (in QtGui, using system library)
  journald ............... no
  libinput................ yes
  mtdev .................. yes (system library)
  Networking: 
    getaddrinfo .......... yes
    getifaddrs ........... yes
    IPv6 ifname .......... yes
    libproxy.............. yes
    OpenSSL .............. yes (linked to the libraries)
  NIS .................... yes
  OpenGL / OpenVG: 
    EGL .................. yes
    OpenGL ............... yes (OpenGL ES 2.0+)
    OpenVG ............... no
  PCRE ................... system
  pkg-config ............. yes 
  PulseAudio ............. yes
  QPA backends: 
    DirectFB ............. no
    EGLFS ................ yes
      EGLFS i.MX6....... . no
      EGLFS KMS .......... no
      EGLFS Mali ......... no
      EGLFS Raspberry Pi . yes
      EGLFS X11 .......... yes
    LinuxFB .............. yes
    XCB .................. yes (system library)
      EGL on X ........... yes
      GLX ................ yes
      MIT-SHM ............ yes
      Xcb-Xlib ........... yes
      Xcursor ............ yes (loaded at runtime)
      Xfixes ............. yes (loaded at runtime)
      Xi ................. no
      Xi2 ................ yes
      Xinerama ........... yes (loaded at runtime)
      Xrandr ............. yes (loaded at runtime)
      Xrender ............ yes
      XKB ................ yes
      XShape ............. yes
      XSync .............. yes
      XVideo ............. yes
  Session management ..... yes
  SQL drivers: 
    DB2 .................. no
    InterBase ............ yes (plugin)
    MySQL ................ yes (plugin)
    OCI .................. no
    ODBC ................. yes (plugin)
    PostgreSQL ........... yes (plugin)
    SQLite 2 ............. no
    SQLite ............... yes (plugin, using system library)
    TDS .................. no
  tslib .................. no
  udev ................... yes
  xkbcommon-x11........... yes (system library)
  xkbcommon-evdev......... yes
  zlib ................... yes (system library)

Unfortunatelly build fails with following error:

make[7]: Entering directory '/home/piotro/ABS/qt5.5/src/qt-everywhere-opensource-src-5.5.1/qtbase/src/plugins/platforms/xcb/gl_integrations/xcb_egl'
/usr/bin/g++ -c -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -O2 -march=armv7-a -mfloat-abi=hard -mfpu=vfpv3-d16 -O2 -pipe -fstack-protector --param=ssp-buffer-size=4 -fvisibility=hidden -fvisibility-inlines-hidden -std=c++0x -fno-exceptions -Wall -W -D_REENTRANT -fPIC -DQT_NO_TSLIB -DXCB_USE_XLIB -DXCB_USE_XINPUT2 -DXCB_USE_RENDER -DXCB_USE_SM -DXCB_USE_XLIB -DQ_FONTCONFIGDATABASE -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_PLATFORMSUPPORT_LIB -DQT_XCB_QPA_LIB_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I../../gl_integrations -I../../../xcb -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vmcs_host/linux -I../../../../../../include -I../../../../../../include/QtPlatformSupport -I../../../../../../include/QtPlatformSupport/5.5.1 -I../../../../../../include/QtPlatformSupport/5.5.1/QtPlatformSupport -I../../../../../../include/QtGui/5.5.1 -I../../../../../../include/QtGui/5.5.1/QtGui -I/home/piotro/ABS/qt5.5/src/qt-everywhere-opensource-src-5.5.1/qtbase/include/QtQGui -I../../../../../../include/QtGui -I../../../../../../include/QtCore/5.5.1 -I../../../../../../include/QtCore/5.5.1/QtCore -I../../../../../../include/QtCore -I.moc -I/opt/vc/include -I/opt/vc/include/interface/vcos/pthreads -I/opt/vc/include/interface/vmcs_host/linux -I../../../../../../mkspecs/devices/linux-rasp-pi2-g++ -o .obj/qxcbeglwindow.o qxcbeglwindow.cpp
qxcbeglwindow.cpp: In member function 'virtual void QXcbEglWindow::create()':
qxcbeglwindow.cpp:85:81: error: invalid conversion from 'xcb_window_t {aka unsigned int}' to 'EGLNativeWindowType {aka void*}' [-fpermissive]
     m_surface = eglCreateWindowSurface(m_glIntegration->eglDisplay(), m_config, m_window, 0);
                                                                                 ^
In file included from qxcbeglinclude.h:43:0,
                 from qxcbeglwindow.h:39,
                 from qxcbeglwindow.cpp:34:
/opt/vc/include/EGL/egl.h:265:31: note:   initializing argument 3 of 'void* eglCreateWindowSurface(EGLDisplay, EGLConfig, EGLNativeWindowType, const EGLint*)'
 EGLAPI EGLSurface EGLAPIENTRY eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config,
                               ^
Makefile:1808: recipe for target '.obj/qxcbeglwindow.o' failed
make[7]: *** [.obj/qxcbeglwindow.o] Error 1
make[7]: Leaving directory '/home/piotro/ABS/qt5.5/src/qt-everywhere-opensource-src-5.5.1/qtbase/src/plugins/platforms/xcb/gl_integrations/xcb_egl'
Makefile:42: recipe for target 'sub-xcb_egl-make_first' failed
make[6]: *** [sub-xcb_egl-make_first] Error 2

I'm not sure is it problem of incompatibility between RPI2 EGL and X11 windowing or
simply kind go bug in qxcbeglwindow.cpp?
If it is incompatibility thing - is there possibility to selectively disable building EGL on X11 but leaving rest as "ON".

Thx in advance for help!

warpme

Hmm...
Really nobody can help here?
Sad.....

SGaist

Hi and welcome to devnet,

Are you following this guide ?

warpme

@SGaist
Thx for replay.
It's pleasure to be here!

Regarding Native Build of Qt5 on a Raspberry Pi guide: yes. I'm basing on this.
It is great that we have such guide. I'm following it and this allow me to prepare build environment (dependencies, etc) on ArchLinux ARM in a way that majority of Qt5.5 components can be build. I believe it is prove that my build environment is quite OK.

Unfortunately building process fails with error I mention in OP.

Now I'm in blocked mode as I don't know: is this (1)bug or rather (2)expected error because RPI EGL and X11 windowing incompatibility.

I'm assuming it is rather (1) as configure process wants to build EGL on X11.
If it wants do it then Qt developers assume this is possible......(or Qt configure wrongly wants do it platform on which it is impossible).

So I need some clarification here.....
-if it is bug then how to fix it
-if RPI2 can't have EGL on X11 - how to selectively disable it.

(I don't want to go with solutions like totally disabling xcb or egl)

br

Without help of somebody exactly knowing what is root cause I can't move forward

SGaist

Since it's the xcb module, I'd try to build with Qt's provided xcb.

warpme

Indeed, going with bundled xcb helps. I was able to successfully build whole 5.5.1
My app works OK with EGLFS.
This time EGL on X11 is disabled by configure automatically however.
Thx for help!

Nominate our 2022 Qt Champions!

Native build 5.5.1 on RPI2: issue with qxcbeglwindow.cpp:85:81: error: invalid conversion