Cross compile Qt with -xcb failed

Hupe

I use arm-linux-gnueabihf- to cross-compile QT 5.15.2 for rk3288， since I run the executable file failed with not found "xcb"
, I add -xcb during the configuration. Then it failed with the following logs:

Trying source 0 (type pkgConfig) of library xcb ...
pkg-config use disabled globally.
  => source produced no result.
Trying source 1 (type inline) of library xcb ...
+ cd /home/matinal/workstation/Qt/qt-everywhere-src-5.15.2/config.tests/xcb && /home/matinal/workstation/Qt/qt-everywhere-src-5.15.2/qtbase/bin/qmake "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" -early "CONFIG += cross_compile" 'QMAKE_USE += xcb' 'QMAKE_LIBS_XCB = -lxcb' /home/matinal/workstation/Qt/qt-everywhere-src-5.15.2/config.tests/xcb
+ cd /home/matinal/workstation/Qt/qt-everywhere-src-5.15.2/config.tests/xcb && MAKEFLAGS= /usr/bin/make
> arm-linux-gnueabihf-g++ -c -pipe -O2 -w -fPIC  -I. -I/home/matinal/workstation/Qt/qt-everywhere-src-5.15.2/qtbase/mkspecs/linux-arm-gnueabihf-g++ -o main.o main.cpp
> arm-linux-gnueabihf-g++ -Wl,-O1 -o xcb main.o   -lxcb
> /usr/lib/gcc-cross/arm-linux-gnueabihf/9/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lxcb
> collect2: error: ld returned 1 exit status
> make: *** [Makefile:67: xcb] Error 1
 => source failed verification.



ERROR: Feature 'xcb' was enabled, but the pre-condition 'features.thread && libs.xcb && tests.xcb_syslibs && features.xkbcommon-x11' failed.

ERROR: Feature 'xcb-xlib' was enabled, but the pre-condition 'features.xlib && libs.xcb_xlib' failed.

It seems that I need to install some extra packages but I don't know which ones are. Does anyone has solved the same problem?

jsulm

@Hupe said in Cross compile Qt with -xcb failed:

cannot find -lxcb

You do not have libxcb in your sysroot. What did you see when you called configure?

raven-worx

@Hupe
first of all see this:
https://doc.qt.io/qt-5/linux-requirements.html

Also Qt creates a small test application and tries to compile it in order to check if all libs are present.
This for example is for the "tests.xcb_syslibs":
https://code.qt.io/cgit/qt/qtbase.git/tree/src/gui/configure.json?h=5.15.2#n1057

So you need to have the following libs installed:

"use": "xcb_icccm xcb_util xcb_image xcb_keysyms xcb_randr xcb_render xcb_renderutil xcb_shape xcb_shm xcb_sync xcb_xfixes xcb_xinerama xcb_xkb xcb"

Hupe

@jsulm
The above log is part of the configure log. The overall log during the configuration is too long to paste. I cut the log that contains "xcb".
I have installed

libfontconfig1-dev libfreetype6-dev libx11-dev libx11-xcb-dev libxext-dev libxfixes-dev libxi-dev libxrender-dev libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev libxcb-sync0-dev libxcb-xfixes0-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0-dev  libxkbcommon-dev libxkbcommon-x11-dev libxcb-xinerama0-dev

as https://doc.qt.io/qt-5/linux-requirements.html shows in my host machine.

Hupe

@raven-worx said in Cross compile Qt with -xcb failed:

icccm

I have installed

libfontconfig1-dev libfreetype6-dev libx11-dev libx11-xcb-dev libxext-dev libxfixes-dev libxi-dev libxrender-dev libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev libxcb-sync0-dev libxcb-xfixes0-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0-dev  libxkbcommon-dev libxkbcommon-x11-dev libxcb-xinerama0-dev

in my host machine before configuration. But it still reports errors as above shows.

jsulm

@Hupe said in Cross compile Qt with -xcb failed:

in my host machine before configuration

It does not matter at all what you install on your host machine. As you are cross compiling you need the lib in your sysroot.

raven-worx

@jsulm said in Cross compile Qt with -xcb failed:

It does not matter at all what you install on your host machine. As you are cross compiling you need the lib in your sysroot.

a sysroot is not necessarily needed, since the "arm-linux-gnueabihf-g++" compiler selects the libraries automatically from the armhf lib paths.

@Hupe said in Cross compile Qt with -xcb failed:

I have installed
libfontconfig1-dev libfreetype6-dev libx11-dev libx11-xcb-dev libxext-dev libxfixes-dev libxi-dev libxrender-dev libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev libxcb-sync0-dev libxcb-xfixes0-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0-dev libxkbcommon-dev libxkbcommon-x11-dev libxcb-xinerama0-dev

its mandatory that you install the armhf packages.
This means you need to install it like this:

libfontconfig1-dev:armhf libfreetype6-dev:armhf ...

Is this the case?
The way you listed the packages would install the host variants of the packages (probably amd64?)

Hupe

@jsulm

I have installed these packages in my rootfs and selected it as my sysroot. But compile with qt still failed with the same error.

Hupe

@raven-worx

It seems that my repository doesn't have a version of armhf. Do you know which repository could install armhf version on the X86 host machine?

raven-worx

@Hupe
what is your host system? Ubuntu/Debian?
see https://wiki.debian.org/Multiarch/HOWTO

i personally prefer building Qt in a docker image. This way you have a (reusable) closed environment with all you need without messing with your host environment.

For a debian based image the following should be enough:

dpkg --add-architecture armhf
apt update
apt -y install mypackage-dev:armhf ....
apt clean

What is the target OS on the device?

Hupe

@raven-worx
I tried to install the development kits as you said, But apt returned an error to install these armhf packages. My host machine runs an Ubuntu 20.04. Now I am trying to start a Debian container to do this.

Hupe

@raven-worx

I can't install these armhf packages even in debian or ubuntu container. It returned with error:

E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/bionic-security/main/binary-armhf/Packages  404  Not Found [IP: 91.189.91.38 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic/universe/binary-armhf/Packages  404  Not Found [IP: 91.189.88.142 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-updates/universe/binary-armhf/Packages  404  Not Found [IP: 91.189.88.142 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/bionic-backports/universe/binary-armhf/Packages  404  Not Found [IP: 91.189.88.142 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

raven-worx

@Hupe
did you run apt update before you tried to install?

Hupe

@raven-worx
Yes, I did.

Hupe

@Hupe

I will pay 300 doges if anyone could teach me how to cross-compile QT with xcb, opengl and webengine.

raven-worx

@Hupe
the repo urls you posted with the errors contain "bionic" (Ubuntu 18.04), but yousaid you are running 20.04, so there is your issue i guess.

This is my (minimal) working "/etc/apt/sources.list" with armhf repos for Ubuntu 20.04:

deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal main restricted
deb [arch=armhf] http://ports.ubuntu.com/ focal main restricted
deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal-updates main restricted
deb [arch=armhf] http://ports.ubuntu.com/ focal-updates main restricted
deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal universe
deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal-updates universe
deb [arch=armhf] http://ports.ubuntu.com/ focal universe
deb [arch=armhf] http://ports.ubuntu.com/ focal-updates universe
deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal multiverse
deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal-updates multiverse
deb [arch=armhf] http://ports.ubuntu.com/ focal multiverse
deb [arch=armhf] http://ports.ubuntu.com/ focal-updates multiverse
deb [arch=amd64,i386] http://at.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
deb [arch=armhf] http://ports.ubuntu.com/ focal-backports main restricted universe multiverse
deb [arch=amd64,i386] http://security.ubuntu.com/ubuntu focal-security main restricted
deb [arch=amd64,i386] http://security.ubuntu.com/ubuntu focal-security universe
deb [arch=amd64,i386] http://security.ubuntu.com/ubuntu focal-security multiverse
deb [arch=armhf] http://ports.ubuntu.com/ focal-security main restricted
deb [arch=armhf] http://ports.ubuntu.com/ focal-security universe
deb [arch=armhf] http://ports.ubuntu.com/ focal-security multiverse

backup your old sources.list, replace it with that one and run "apt update" again

Hupe

@Hupe said in Cross compile Qt with -xcb failed:

libfontconfig1-dev libfreetype6-dev libx11-dev libx11-xcb-dev libxext-dev libxfixes-dev libxi-dev libxrender-dev libxcb1-dev libxcb-glx0-dev libxcb-keysyms1-dev libxcb-image0-dev libxcb-shm0-dev libxcb-icccm4-dev libxcb-sync0-dev libxcb-xfixes0-dev libxcb-shape0-dev libxcb-randr0-dev libxcb-render-util0-dev libxkbcommon-dev libxkbcommon-x11-dev libxcb-xinerama0-dev

thanks，I have added armhf source with ubuntu-ports successful. I installed armhf dependencies listed in [https://wiki.qt.io/Building_Qt_5_from_Git](link URL) both in the host machine and target machine. Now the -lxcb can be found, But config still fail with error :

Trying source 0 (type pkgConfig) of library xcb_xlib ...
+ PKG_CONFIG_SYSROOT_DIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary PKG_CONFIG_LIBDIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/share/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/arm-linux-gnueabihf/pkgconfig /usr/bin/pkg-config --exists --silence-errors x11-xcb
+ PKG_CONFIG_SYSROOT_DIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary PKG_CONFIG_LIBDIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/share/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/arm-linux-gnueabihf/pkgconfig /usr/bin/pkg-config --modversion x11-xcb
> 1.6.9
+ PKG_CONFIG_SYSROOT_DIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary PKG_CONFIG_LIBDIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/share/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/arm-linux-gnueabihf/pkgconfig /usr/bin/pkg-config --libs-only-L x11-xcb
> -L/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/arm-linux-gnueabihf
+ PKG_CONFIG_SYSROOT_DIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary PKG_CONFIG_LIBDIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/share/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/arm-linux-gnueabihf/pkgconfig /usr/bin/pkg-config --libs-only-l x11-xcb
> -lX11-xcb -lX11 -lxcb
+ PKG_CONFIG_SYSROOT_DIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary PKG_CONFIG_LIBDIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/share/pkgconfig:/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary/usr/lib/arm-linux-gnueabihf/pkgconfig /usr/bin/pkg-config --cflags x11-xcb
X11/Xlib-xcb.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library xcb_xlib ...
X11/Xlib-xcb.h not found in [] and global paths.
  => source produced no result.

I don't know which library is still missed, Could you please help me. orz

Hupe

I could find X11/Xlib-xcb.h manually:

:/usr/include# find ./ -name Xlib-xcb.h
./X11/Xlib-xcb.h

And I found a lot of missing header files in config.log:

matinal@matinal-host:~/workstation/Qt/qt-everywhere-src-5.15.2$ grep -rn "not found in \[\] and global paths" config.log 
109:dbus/dbus.h not found in [] and global paths.
173:libudev.h not found in [] and global paths.
176:libudev.h not found in [] and global paths.
391:unicode/utypes.h not found in [] and global paths.
392:unicode/ucol.h not found in [] and global paths.
393:unicode/ustring.h not found in [] and global paths.
438:pcre2.h not found in [] and global paths.
441:pcre2.h not found in [] and global paths.
454:sys/slog2.h not found in [] and global paths.
477:double-conversion/double-conversion.h not found in [] and global paths.
506:openssl/ssl.h not found in [] and global paths.
507:openssl/opensslv.h not found in [] and global paths.
584:xcb/xcb_icccm.h not found in [] and global paths.
587:xcb/xcb_icccm.h not found in [] and global paths.
640:EGL/egl.h not found in [] and global paths.
643:EGL/egl.h not found in [] and global paths.
716:VG/openvg.h not found in [] and global paths.
723:harfbuzz/hb.h not found in [] and global paths.
734:jpeglib.h not found in [] and global paths.
762:md4c.h not found in [] and global paths.
767:tslib.h not found in [] and global paths.
776:vulkan/vulkan.h not found in [] and global paths.
799:X11/Xlib-xcb.h not found in [] and global paths.
802:X11/Xlib-xcb.h not found in [] and global paths.
815:xkbcommon/xkbcommon.h not found in [] and global paths.
818:xkbcommon/xkbcommon.h not found in [] and global paths.
829:cups/cups.h not found in [] and global paths.
836:sqlcli.h not found in [] and global paths.
837:sqlcli1.h not found in [] and global paths.
844:ibase.h not found in [] and global paths.
861:mysql.h not found in [] and global paths.
868:mysql.h not found in [] and global paths.
871:mysql.h not found in [] and global paths.
878:oci.h not found in [] and global paths.
887:sql.h not found in [] and global paths.
888:sqlext.h not found in [] and global paths.
902:libpq-fe.h not found in [] and global paths.
907:sqlite.h not found in [] and global paths.
959:jasper/jasper.h not found in [] and global paths.
966:libmng.h not found in [] and global paths.
973:tiffio.h not found in [] and global paths.
980:webp/decode.h not found in [] and global paths.
981:webp/encode.h not found in [] and global paths.
982:webp/demux.h not found in [] and global paths.
983:webp/mux.h not found in [] and global paths.
1101:wayland-version.h not found in [] and global paths.
1110:wayland-egl.h not found in [] and global paths.
1113:wayland-egl.h not found in [] and global paths.
1122:wayland-version.h not found in [] and global paths.
1439:vpx/vpx_encoder.h not found in [] and global paths.
1440:vpx/vp8cx.h not found in [] and global paths.
1497:snappy.h not found in [] and global paths.
1582:alsa/asoundlib.h not found in [] and global paths.

I wonder is there any pre-config that should do for pkg-config?

raven-worx

@Hupe
back to the start. please show your Qt configure line.

PKG_CONFIG_SYSROOT_DIR=/home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary

did you specify a sysroot? if so the libs should be contained in the sysroot, which they are not by simply installing it on your host system of course.

Hupe

This is my configure line now:


#~/bin/bash
./configure \
        -v \
        -extprefix /opt/Qt5.15.2-armhf  \
        -hostprefix /opt/Qt5.15.2-armhf-host \
        -sysroot /home/matinal/workstation/rk-source/rk3288-linux/linux/ubuntu/binary \
        -xplatform linux-arm-gnueabihf-g++ \
        -opensource \
        -confirm-license \
        -shared \
        -strip \
        -xcb-xlib \
        -xcb \
        -gui \
        -make libs \
        -make tools \
        -widgets \
        -nomake examples

I have installed the pre-required libs in my sysroot and could find X11/Xlib-xcb.h