Qt6 Cross compilation GLIBC_2.29 undefined reference problem

PhysicsX

Hello everyone,

I try to compile qt on ubuntu host machine for target machine.
I successfully compiled the Qt6 Core. But I can not compile simple example with cmake for target.

my cmake

cmake_minimum_required(VERSION 3.5)
project(HelloQt6 LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(Qt6Core)
add_executable(HelloQt6 main.cpp)
target_link_libraries(HelloQt6 Qt6::Core)

main.cpp

#include <QCoreApplication>
#include <QDebug>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qDebug()<<"Hello world";
    return a.exec();
}

When I run the qt-cmake file to create a makefile there is no problem
But during linking I am getting this:

/opt/rpi/rpi-gcc-8.3.0/lib/gcc/arm-linux-gnueabihf/8.3.0/../../../../arm-linux-gnueabihf/bin/ld: /home/user/rpi-sdk/sysroot/usr/lib/arm-linux-gnueabihf//libicui18n.so.67: undefined reference to `log@GLIBC_2.29'
/opt/rpi/rpi-gcc-8.3.0/lib/gcc/arm-linux-gnueabihf/8.3.0/../../../../arm-linux-gnueabihf/bin/ld: /home/user/rpi-sdk/sysroot/usr/lib/arm-linux-gnueabihf//libicui18n.so.67: undefined reference to `pow@GLIBC_2.29'

When I check the path libstdc++ is there. With strings tool I can see that

strings /home/user/rpi-sdk/sysroot/usr/lib/arm-linux-gnueabihf/libstdc++.so.6 | grep GLIBCXX
GLIBCXX_3.4
GLIBCXX_3.4.1
GLIBCXX_3.4.2
GLIBCXX_3.4.3
GLIBCXX_3.4.4
GLIBCXX_3.4.5
GLIBCXX_3.4.6
GLIBCXX_3.4.7
GLIBCXX_3.4.8
GLIBCXX_3.4.9
GLIBCXX_3.4.10
GLIBCXX_3.4.11
GLIBCXX_3.4.12
GLIBCXX_3.4.13
GLIBCXX_3.4.14
GLIBCXX_3.4.15
GLIBCXX_3.4.16
GLIBCXX_3.4.17
GLIBCXX_3.4.18
GLIBCXX_3.4.19
GLIBCXX_3.4.20
GLIBCXX_3.4.21
GLIBCXX_3.4.22
GLIBCXX_3.4.23
GLIBCXX_3.4.24
GLIBCXX_3.4.25
GLIBCXX_3.4.26
GLIBCXX_3.4.27
GLIBCXX_3.4.28
GLIBCXX_DEBUG_MESSAGE_LENGTH

As I understand my application wants to use 3.4 but why it tries to link to 2.29 version?
Or am I doing something wrong ?

Any idea ?
Thank you.

PhysicsX

After linking fom cmake with

set(CMAKE_C_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wl,-rpath-link, ${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE} -L${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wl,-rpath-link,${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE} -L${CMAKE_SYSROOT}/usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}")

problem is solved.

Thanks.