Re: [Buildroot] Not able to enable GUI library on Buildroot

[Peter Seiderer <ps.report@gmx.net>]

Hello Avijit,

On Tue, 15 Mar 2022 19:04:02 -0600, Avijit Das <avijitnsec@gmail.com> wrote:

> Hi,
> 
> I am building Buildroot for an imx8mm board. The HDMI display is up. I
> validated the display using the fb-test. I am trying to enable a graphics
> library, either gtk3 or qt5.
> 
> *gtk3 *
> When I am enabling the gtk3 library, if I run the demo application, I am
> getting the following error.
> 
> # /usr/bin/gtk3-demo
> 
> (gtk3-demo:350): Gtk-WARNING **: 01:21:03.518: cannot open display:
> #
> 
> I have tried setting the display to localhost:0.0, did not work.
> 
> *QT5*
> The widget library is not building. There is a compilation error:
> 
> qkeyeventtransition.o .obj/qmouseeventtransition.o
> .obj/qbasickeyeventtransition.o .obj/qbasicmouseeventtransition.o
> .obj/qgraphicseffect.o .obj/qpixmapfilter.o .obj/qrc_qstyle.o
> .obj/qrc_qmessagebox.o .obj/moc_qwidgetrepaintmanager_p.o
> .obj/moc_qwidget_p.o .obj/moc_qpixmapstyle_p.o  -latomic
> /home/avijit/buildroot/output/build/qt5base-d16bf02a11953dcac01dca73e6f3778f293adefe/lib/libQt5Gui.so
> /home/avijit/buildroot/output/build/qt5base-d16bf02a11953dcac01dca73e6f3778f293adefe/lib/libQt5Core.so
> -lpthread  -lrt -lpthread -ldl
> ln -s libQt5Widgets.so.5.15.8 libQt5Widgets.so
> ln -s libQt5Widgets.so.5.15.8 libQt5Widgets.so.5
> ln -s libQt5Widgets.so.5.15.8 libQt5Widgets.so.5.15
> rm -f ../../lib/libQt5Widgets.so.5.15.8
> mv -f libQt5Widgets.so.5.15.8 ../../lib/libQt5Widgets.so.5.15.8
> rm -f ../../lib/libQt5Widgets.so
> rm -f ../../lib/libQt5Widgets.so.5
> rm -f ../../lib/libQt5Widgets.so.5.15
> mv -f libQt5Widgets.so ../../lib/libQt5Widgets.so
> mv -f libQt5Widgets.so.5 ../../lib/libQt5Widgets.so.5
> mv -f libQt5Widgets.so.5.15 ../../lib/libQt5Widgets.so.5.15
> make[2]: *** [Makefile:51: sub-src-make_first] Error 2
> make[1]: *** [package/pkg-generic.mk:292:
> /home/avijit/buildroot/output/build/qt5base-d16bf02a11953dcac01dca73e6f3778f293adefe/.stamp_built]
> Error 2
> make: *** [Makefile:84: _all] Error 2
> 
> I have attached the config file. Can you please suggest?

With your defconfig I get the following error (a lot of lines above in the log):

  qeglconvenience.cpp: In function ‘bool q_hasEglExtension(EGLDisplay, const char*)’:
  qeglconvenience.cpp:418:23: error: variable ‘QList<QByteArray> extensions’ has initializer but incomplete type
    418 |     QList<QByteArray> extensions =
        |                       ^~~~~~~~~~
  qeglconvenience.cpp:420:65: error: invalid use of incomplete type ‘class QList<QByteArray>’
    420 |             (eglQueryString(display, EGL_EXTENSIONS))).split(' ');
        |


This can be (compile) fixed by this (buildroot) patch:

	           https://patchwork.ozlabs.org/project/buildroot/patch/20220316182440.17393-1-ps.report@gmx.net/


Despite of this error I get (with your provided defconfig):

  [4/5] Compiling C object src/libepoxy.so.0.0.0.p/dispatch_common.c.o
  FAILED: src/libepoxy.so.0.0.0.p/dispatch_common.c.o 
  .../host/bin/aarch64-buildroot-linux-gnu-gcc -Isrc/libepoxy.so.0.0.0.p -Isrc -I../src -Iinclude -I../include -Iinclude/epoxy -fdiagnostics-color=always -Wall -Winvalid-pch -std=gnu99 -O3 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -g0 -fPIC -Wpointer-arith -Wmissing-declarations -Wformat=2 -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wbad-function-cast -Wold-style-definition -Wdeclaration-after-statement -Wunused -Wuninitialized -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls -Wlogical-op -Werror=implicit -Werror=nonnull -Werror=init-self -Werror=main -Werror=missing-braces -Werror=sequence-point -Werror=return-type -Werror=trigraphs -Werror=array-bounds -Werror=write-strings -Werror=address -Werror=int-to-pointer-cast -Werror=pointer-to-int-cast -fno-strict-aliasing -Wno-int-conversion -fvisibility=hidden -MD -MQ src/libepoxy.so.0.0.0.p/dispatch_common.c.o -MF src/libepoxy.so.0.0.0.p/dispatch_common.c.o.d -o src/libepoxy.so.0.0.0.p/dispatch_common.c.o -c ../src/dispatch_common.c
  In file included from include/epoxy/egl_generated.h:11,
                   from ../include/epoxy/egl.h:46,
                   from ../src/dispatch_common.h:59,
                   from ../src/dispatch_common.c:174:
  .../host/aarch64-buildroot-linux-gnu/sysroot/usr/include/EGL/eglplatform.h:145:10: fatal error: X11/Xlib.h: No such file or directory
    145 | #include <X11/Xlib.h>
        |          ^~~~~~~~~~~~
  compilation terminated.
  ninja: build stopped: subcommand failed.
  make[1]: *** [package/pkg-generic.mk:292: /home/seiderer/Work/Buildroot/build_imx8mmevk_qt5_001/build/libepoxy-1.5.9/.stamp_built] Error 1
  make: *** [Makefile:23: _all] Error 2

Regards,
Peter

> 
> Thanks,
> Avijit

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