qt5 on i.MX6: cross compiler error

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qt5 on i.MX6: cross compiler error

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Contributor I


i got the following cross compiler error:

/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/../lib/gcc/arm-fsl-linux-gnueabi/4.6.2/../../../../arm-fsl-linux-gnueabi/include/c++/4.6.2/bits/atomic_0.h: In constructor 'constexpr std::__atomic0::__atomic_base<_PTp*>::__atomic_base(std::__atomic0::__atomic_base<_PTp*>::__return_pointer_type) [with _PTp = const int, std::__atomic0::__atomic_base<_PTp*>::__return_pointer_type = const int*]':

/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/../lib/gcc/arm-fsl-linux-gnueabi/4.6.2/../../../../arm-fsl-linux-gnueabi/include/c++/4.6.2/atomic:245:54:   instantiated from 'constexpr std::atomic<_Tp*>::atomic(std::atomic<_Tp*>::__pointer_type) [with _Tp = const int, std::atomic<_Tp*>::__pointer_type = const int*]'

../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:261:78:   instantiated from 'constexpr QBasicAtomicPointer<T>::QBasicAtomicPointer(QBasicAtomicPointer<T>::Type) [with X = const int, QBasicAtomicPointer<T>::Type = const int*]'

../../include/QtCore/../../src/corelib/thread/qatomic.h:123:89:   instantiated from 'constexpr QAtomicPointer<T>::QAtomicPointer(T*) [with T = const int]'

../../include/QtCore/5.0.0/QtCore/private/../../../../../src/corelib/kernel/qobject_p.h:138:77:   instantiated from here

/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/../lib/gcc/arm-fsl-linux-gnueabi/4.6.2/../../../../arm-fsl-linux-gnueabi/include/c++/4.6.2/bits/atomic_0.h:455:68: error: invalid conversion from 'const void*' to 'std::__atomic0::__atomic_base<const int*>::__pointer_type {aka void*}' [-fpermissive]

make[3]: *** [.obj/debug-shared/qabstractanimation.o] Error 1

make[3]: Leaving directory `/home/medec01/work/Qt5Beta/qtbase/src/corelib'

make[2]: *** [sub-corelib-make_first] Error 2

make[2]: Leaving directory `/home/medec01/work/Qt5Beta/qtbase/src'

make[1]: *** [sub-src-make_first] Error 2

make[1]: Leaving directory `/home/medec01/work/Qt5Beta/qtbase'

make: *** [module-qtbase-make_first] Error 2

i have been using the following configure:

sudo ./configure -developer-build -opensource -confirm-license -nomake examples -nomake tests -nomake docs -nomake demos -device imx6 -device-option CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-fsl-linux-gnueabi- -sysroot /home/medec01/work/ltib/ltib/rootfs -no-gcc-sysroot -make libs -prefix /usr/local/Trolltech/Qt5-imx6-1

and the following LTIB: L3.0.35_12.09.01_GA_source downloaded from freescale website

do any of you have any idea?

thanks in advance,

kind regards,


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NXP Employee
NXP Employee

I been using the following and it works for me.

./configure -v -opensource -confirm-license -no-pch -no-opengl -opengl es2  \

        -make libs -device imx6 \

     -make examples -make demos \

-device-option CROSS_COMPILE=/opt/freescale/usr/local/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/arm-fsl-linux-gnueabi- \

-sysroot <rootfs> -no-gcc-sysroot \

-prefix <installdir>


IMX6_CFLAGS             = -march=armv7-a -mfpu=neon -DLINUX=1 -DEGL_API_FB=1

Makesure it correct. That selects the correct platform in EGL.

Contributor II

I am compiling qt5.6 for imx6qsabreauto.

I ran into same problem.

IMX6_CFLAGS = -DLINUX=1 -DEGL_API_FB=1 added this and -no-dbus in configuration made it compile but when I load this image, I am not able to run qt application. QT application throws error message that "Cannot create platform OpenGL context, neither GLX nor EGL are enabled".

Then I removed all this and done some modifications according to the errors.

After spending around 10 working day, I figured out the problem. I have done two things:

1) There was a error: "qdatastream.h must be included before any other header files which defines Status"

     Add this qtextream.h  and qdatastream.h(if it complaints about this file as well) in a file which has this error.

2) There were some other errors as well like "None=0 where None is not defined". For this errors just move your platform dependent X11 header files after all qt headers.

I did it in file qeglpbuffer.h and moved #include <EGL/egl.h> after all other qt header files (kept it as last include file).

That made it working :smileyhappy:

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Contributor II

I am using yocto bitbake to build the qt5 image, how can I pass the cflags into the build?

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Contributor V

This made it! thanks

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Contributor V

Where you able to finish your compilation with the answer?

I got after that, but got this new error "platform not recognized"

In file included from /data/BSP/imx6/ltib1.1.0/ltib/rootfs/usr/include/EGL/eglplatform.h:38:0,

                 from /data/BSP/imx6/ltib1.1.0/ltib/rootfs/usr/include/EGL/egl.h:34,

                 from eglconvenience/qeglconvenience_p.h:49,

                 from eglconvenience/qeglconvenience.cpp:44:

/data/BSP/imx6/ltib1.1.0/ltib/rootfs/usr/include/EGL/eglvivante.h:246:2: error: #error "Platform not recognized"

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Contributor I

I ran into the same problem when cross-compiling Qt 4.8.3. My workaround was to manually define what my target was:

I added the following to eglvivante.h, and it seems to be building it fine.

#define LINUX

#define EGL_API_FB  // or EGL_API_DFB if using DirectFB

hope this helps.

Contributor III

add option "-no-c++11" will fix this issue

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