[Solved] I don't use my custom build Qt

moravas

Update:
I use different compiler to compile Qt framework and to my project. If I compile those with same compiler, the problem doesn't occurs longer.

Hi People,

My problem is the following:

I have an ARM Cortex A8 based embedded device.
On this device would like I run an custom Qt application.
I build the Qt 5.0.2 framework from source for those.

Everything is OK during the building, but I don't can compile my fist test application which uses a simple QVector instance, like this:

@
int main()
{
QVector<int> v;
return 0;
}
@

I got the following error from the linker:
@
g++ -Wl,-O1 -Wl,-rpath,/home/<path>/bin/lib -o masterController main.o -L/home/<path>/bin/lib -lQt5Core -lpthread
main.o: In function main': /home/<path>/masterController/../../../../<path>/include/QtCore/qvector.h:76: undefined reference to QArrayData::deallocate(QArrayData*, unsigned long, unsigned long)'
collect2: ld returned 1 exit status
@
This messages says that the linker doesn't found any "deallocate" method which accept two unsigned long parameter. I list the libQt5Core.so lib with the following command:
@
readelf -Ws libQt5Core.so | grep deallocate | c++filt
@

and got this:
@
3219: 0006dfed 20 FUNC GLOBAL DEFAULT 12 QArrayData::deallocate(QArrayData*, unsigned int, unsigned int)
@

So I have "deallocate" method, but at compile time the parameters are identify as unsigned int -s but the linker looking for unsigned long-s.

I don't any idea how can I fix this bug. Have anybody some tip?

Regards,
Norbert

SGaist

Hi,

Are you sure you are using the cross-compiler ? g++ is generally the compiler installed on your system. You should rather have something like arm-linux-something-g++ while compiling for your target.

moravas

Hi,

I don't use the traditional meaning cross compilation. The board has 1GHz CPU and 1GB RAM so I decided that it is able to compile the full Qt framework itself.
What you see in the logs as "g++" is the output from the ssh console of embedded board.

Regards,
Norbert

SGaist

Ok, so your compiling everything directly on your target.

Your paths look strange to me. Did you install your Qt 5 build properly ?

moravas

Hi,

my path looks out in the first post:
"/home/<path>/bin/lib"
because I don't would like displaying the full length of path, but the original path looks like this:
"/home/moravas/project/thesisOfMSC/cubie/bin/lib"

Regards,
Norbert

SGaist

That doesn't answer my first question:

Did you compile and install Qt 5 properly on your target ?

moravas

yes, I ran configure, make, make check and make install.
For configure I specified the install path, c++11 support, and -no-pch.

Regards,
Norbert

moravas

Hi,

some update: I am looking for some error on the internet and I found the following two bug reports:
https://codereview.qt-project.org/#change,32868
https://codereview.qt-project.org/#change,33493

They have same error messages and the status of ticket is closed and solved, but I don't understand where I can reach the solution (branch, Qt release, tag, etc...)

Can anybody help me? :(

Thank you
Regards,
Norbert