> On 24 Jan 2022, at 17:04, Thiago Macieira wrote:
>
> On Monday, 24 January 2022 05:30:46 PST Konrad Rosenbaum wrote:
>> I have absolutely no problem with stuff running faster and more
>> efficient on my two laptops (which are significantly more modern), but I
>> would have a major problem with it not running at all on my workstation
>> that I use for 95% of all my Open Source work. And I would also not like
>> my applications to crash on my downstream user's computers (which are on
>> average just as old as mine) - every crash means hours of work for
>> someone (usually me) to find out what the problem was.
>
> At least i can promise you not to make it a silent crash. Either QtCore or
> the
> dynamic linker would say it can't run on that machine.
>
> https://code.woboq.org/qt6/qtbase/src/corelib/global/
> qsimd.cpp.html#_Z16qDumpCPUFeaturesv
I have a possibly wrong hunch that building Qt Multimedia fails because of
this. This is in a Ubuntu 20.04 VM in the VMware Fusion 12 provider, and the
hardware version is maxed out (it wasn’t earlier, but didn’t help to put it to
level 18). So there’s not a whole lot I can do on the VM provisioning side, I
think.
Volker
In file included from
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/qsimd_p.h:1,
from
/home/vagrant/qt/dev/qtmultimedia/src/multimedia/video/qvideoframeconversionhelper_p.h:55,
from
/home/vagrant/qt/dev/qtmultimedia/src/multimedia/video/qvideoframeconversionhelper_avx2.cpp:40:
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:256:8:
error: #error "Please enable all x86-64-v3 extensions; you probably want to
use -march=haswell or -march=x86-64-v3 instead of -mavx2"
256 | # error "Please enable all x86-64-v3 extensions; you probably want
to use -march=haswell or -march=x86-64-v3 instead of -mavx2"
|^
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:253:49:
error: ‘__BMI__’ was not declared in this scope
253 | # define ARCH_HASWELL_MACROS (__AVX2__ + __BMI__ + __BMI2__ +
__F16C__ + __FMA__ + __LZCNT__)
| ^~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:258:15:
note: in expansion of macro ‘ARCH_HASWELL_MACROS’
258 | static_assert(ARCH_HASWELL_MACROS, "Undeclared identifiers indicate
which features are missing.");
| ^~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:253:59:
error: ‘__BMI2__’ was not declared in this scope
253 | # define ARCH_HASWELL_MACROS (__AVX2__ + __BMI__ + __BMI2__ +
__F16C__ + __FMA__ + __LZCNT__)
| ^~~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:258:15:
note: in expansion of macro ‘ARCH_HASWELL_MACROS’
258 | static_assert(ARCH_HASWELL_MACROS, "Undeclared identifiers indicate
which features are missing.");
| ^~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:253:70:
error: ‘__F16C__’ was not declared in this scope
253 | # define ARCH_HASWELL_MACROS (__AVX2__ + __BMI__ + __BMI2__ +
__F16C__ + __FMA__ + __LZCNT__)
|
^~~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:258:15:
note: in expansion of macro ‘ARCH_HASWELL_MACROS’
258 | static_assert(ARCH_HASWELL_MACROS, "Undeclared identifiers indicate
which features are missing.");
| ^~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:253:81:
error: ‘__FMA__’ was not declared in this scope
253 | # define ARCH_HASWELL_MACROS (__AVX2__ + __BMI__ + __BMI2__ +
__F16C__ + __FMA__ + __LZCNT__)
|
^~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:258:15:
note: in expansion of macro ‘ARCH_HASWELL_MACROS’
258 | static_assert(ARCH_HASWELL_MACROS, "Undeclared identifiers indicate
which features are missing.");
| ^~~
/home/vagrant/dev-build/qtbase/include/QtCore/6.4.0/QtCore/private/../../../../../../../qt/dev/qtbase/src/corelib/global/qsimd_p.h:253:91:
error:
