fatal error: sys/cdefs.h: No such file or directory

[cooked]

Hi, thanks for the nice framework. I've managed to cross compile and deploy Qt from linux PC to Raspberry Pi 4 (gcc 8.3.0 toolchain). I'm trying to compile a test program for the RPi in QtCreator on the PC, but I get the following error. Any clue ?

In file included from /home/stefano/qtrpi4/tools/cross-pi-gcc-8.3.0-2/arm-linux-gnueabihf/include/c++/8.3.0/arm-linux-gnueabihf/bits/os_defines.h:39, from /home/stefano/qtrpi4/tools/cross-pi-gcc-8.3.0-2/arm-linux-gnueabihf/include/c++/8.3.0/arm-linux-gnueabihf/bits/c++config.h:508, from /home/stefano/qtrpi4/tools/cross-pi-gcc-8.3.0-2/arm-linux-gnueabihf/include/c++/8.3.0/type_traits:38, from ../qtrpi4/qt5.15/include/QtCore/qglobal.h:45, from ../qtrpi4/qt5.15/include/QtGui/qtguiglobal.h:43, from ../qtrpi4/qt5.15/include/QtWidgets/qtwidgetsglobal.h:43, from ../qtrpi4/qt5.15/include/QtWidgets/qmainwindow.h:43, from ../qtrpi4/qt5.15/include/QtWidgets/QMainWindow:1, from ../qt-test-2/mainwindow.h:4, from ../qt-test-2/main.cpp:1: /home/stefano/qtrpi4/sysroot/usr/include/features.h:424:12: fatal error: sys/cdefs.h: No such file or directory

[abhiTronix]

@cooked Seems like you either failed to symlink sys directory properly or failed to rsync /usr/include directory from your raspberry pi.

Solution

1. First, Make symlinks properly on your raspberry pi:

   sudo ln -sf /usr/include/arm-linux-gnueabihf/asm/* /usr/include/asm/
   sudo ln -sf /usr/include/arm-linux-gnueabihf/gnu/* /usr/include/gnu/
   sudo ln -sf /usr/include/arm-linux-gnueabihf/bits/* /usr/include/bits/
   sudo ln -sf /usr/include/arm-linux-gnueabihf/sys/* /usr/include/sys/
   sudo ln -sf /usr/include/arm-linux-gnueabihf/openssl/* /usr/include/openssl/

2. Then, Do step-6 and step-7 again.

3. Clear build directory:

   cd ~/rpi-qt/build
   sudo rm -rf *

4. Run step-8 and continue from there as shown in guide.

[cooked]

Hi @abhiTronix , thanks that solved the problem. Weirdly enough in my command line history I could see that I had issued already all the simlinks exactly as per your instructions

[abhiTronix]

Weirdly enough in my command line history I could see that I had issued already all the simlinks exactly as per your instructions

@cooked Your're not wrong. Symlinks behave weirdly when there's already similar named folder/file present at destination, they sometime works and other times not. That's why I'm looking for alternatives to create symlinks safely.

[abhiTronix]

@cooked New SSymlinker bash script here to create symlinks more reliably. 😃

[cooked]

@cooked New SSymlinker bash script here to create symlinks more reliably. smiley

that seems to work a treat !!!

in the meantime got stuck on another error that might be related and hopefully you can help me solve when I try to crosscompile on PC my program I get:

arm-linux-gnueabihf/bin/ld: warning: libmmal_core.so, needed by /home/stefano/qtrpi4/sysroot/usr/lib/arm-linux-gnueabihf/libavcodec.so.58, not found (try using -rpath or -rpath-link)

I've qt built with opencv support (and opencv is installed on the rpi)... it looks like the /opt/vc folder is not copied or symlinked correctly...

any hints?

[abhiTronix]

@cooked Apologies for the delay. This might be related: https://raspberrypi.stackexchange.com/a/34110/90170