[Buildroot] Qt5 puzzle

[Charles Krinke]

Yes, sir. I am attaching the config so as not to clog up the email too much
and I appreciate your kind words as usual.

Charles


On Wed, Nov 6, 2013 at 10:18 AM, Thomas Petazzoni <
thomas.petazzoni at free-electrons.com> wrote:

> Dear Charles Krinke,
>
> On Wed, 6 Nov 2013 08:57:45 -0800, Charles Krinke wrote:
>
> > Recently one of our app engineers moved to QtQuick 2.0 and all of a
> sudden
> > with the buildroot built binaries from Qt-5.0.2, I am seeing this error
> > when a qml-style program is run.
> >
> > ERROR: Binary compiled with -mfloat-abi=hard but without
> > -DUSE_EABI_HARDFLOAT
> >
> > In searching this, I can see mention of this on the buildroot mailing
> list
> > from June, but no hints or resolution. The archive of the mailing list is
> > this page:
> >
> >
> http://buildroot-busybox.2317881.n4.nabble.com/ERROR-Binary-compiled-with-mfloat-abi-hard-but-without-DUSE-EABI-HARDFLOAT-td49130.html
> >
> > Although I am using the TI AM3517 and not Raspberry Pi, the error seems
> to
> > be the same.
> >
> > I am assuming this has something to do with make options. This morning, I
> > tried adding "-DUSE-EABI_HARDFLAT" to the Makefile for libQt5V8 where the
> > offending message is coming from, but the cheap shot doesnt work.
> >
> > I am working with a buildroot from the end of July, so am not using the
> > experimental Qt-5.1 stuff (yet) and am hoping not to move forward in a
> > crisis if I can help it.
> >
> > So, ... as usual, I am hoping for a clue or two to let me understand how
> to
> > get QtQuick back to functionality with Qt-5.0.2.
>
> Interesting. I had a look at this, in Qt 5.0.2, as packaged in
> Buildroot 2013.08. Normally, the USE_EABI_HARDFLOAT flag should
> automatically be set to 1 by Qt. From src/v8/v8.pri:
>
> equals(V8_TARGET_ARCH, arm) {
> DEFINES += V8_TARGET_ARCH_ARM
> config_hardfloat {
>     DEFINES += USE_EABI_HARDFLOAT=1
> } else {
>     DEFINES += USE_EABI_HARDFLOAT=0
> }
> ...
>
> config_hardfloat is I believe decided from the test executed from the
> main qtjsbackend.pro:
>
> qtCompileTest(hardfloat)
>
> and there is indeed a config.tests/hardfloat/, which builds a program,
> and then looks up with readelf if it's built hard float or not. Most
> likely this test is failing, for some reason, and therefore believes
> that the toolchain is not hardfp, while it actually is. I had a quick
> read of the test and it seems to be testing something correct.
>
> Can you post your .config so we can see what your toolchain is and what
> is your Buildroot configuration?
>
> Thanks!
>
> Thomas
> --
> Thomas Petazzoni, CTO, Free Electrons
> Embedded Linux, Kernel and Android engineering
> http://free-electrons.com
>



-- 
Charles Krinke
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