cross-complie QT5.8 with multimedia

[Lann]

my embedded platform is ARM x64. i cross-compile QT 5.8 with the following comfigure string:

./configure -extprefix /opt/QT5.8.0 -release -opensource -xplatform linux-aarch64-gnu-g++ -no-opengl -nomake examples -optimized-qmake -pch -qt-libjpeg -qt-libpng -no-sse2 -no-openssl -no-cups -no-glib -no-iconv -no-separate-debug-info -no-pkg-config -xcb-xlib -qpa xcb

after that, i use the cross-compile version of kit to debug the code (which is success in desktop kit) in QT Creator . But fail with:
Project ERROR: Unknown module(s) in QT: multimedia multimediawidgets

i think the problem is the QT cross-compile doesn't contain multimedia and multidiawidgets components. Then, what should i do.

Thanks.

[Pablo J. Rogina]

@Lann you may want to check step #16 from this guide as it may help you. Essentially you'll be cloning repository https://code.qt.io/cgit/qt/qtmultimedia.git

BTW, I would like to ask where you get the cross-compiler for aarcg64 (linux-aarch64-gnu-g++) from?

[Lann]

thanks for the guide.

i get cross-compiler for aarch64 from linaro:
https://releases.linaro.org/components/toolchain/binaries/5.4-2017.01/aarch64-linux-gnu/

[Pablo J. Rogina]

@Lann thank you for the link.
Just a couple more things please:

1. what about sysroot? did you use the provided by linaro?
2. have you added the Qt framework dependencies as well to your sysroot? If so, how?

[Lann]

im new on this filed. and what does 'sysroot' mean?

[jsulm]

@Lann Sysroot is a snapshot of the file system of your target device. It is needed because you need libraries and headers from your target device when cross compiling.

[Lann]

@Pablo-J.-Rogina
i have already downloaded source code of qtmultimedia from
https://download.qt.io/archive/qt/5.8/5.8.0/submodules/
but i have no idea to cross-compile this module. because i find no 'configure' file.
for cross-compiling QT5.8, i followed this steps:

• ./configure ...
• make -j4
• make install
  and should i follow this steps to cross-compile qtmultimedia and how?

[Pablo J. Rogina]

@Lann said in cross-complie QT5.8 with multimedia:

what does 'sysroot' mean?

As stated by @jsulm "sysroot" is the folder/location of the headers/libraries (mostly) that you use during cross-compile, so the resulting component (Qt libraries in this case, or a Qt app later on) can run properly in the target device.

So it's strange that you claimed you cross-compiled Qt framework, but you didn't pay attention to sysroot (I'm not telling you off, I'm just curious about that)

[Pablo J. Rogina]

@Lann said in cross-complie QT5.8 with multimedia:

i find no 'configure' file.

It looks like you didn't look at step #16 as I suggested previously...