On 2019-Feb-10, at 11:24, Steve Kargl <sgk at troutmask.apl.washington.edu>
wrote:
> On Sun, Feb 10, 2019 at 11:13:09AM -0800, Mark Millard wrote:
>>
>> On 2019-Feb-10, at 10:46, Steve Kargl <sgk at troutmask.apl.washington.edu>
>> wrote:
>>>
>>> On Sun, Feb 10, 2019 at 12:03:55PM +0100, Dimitry Andric wrote:
>>>> On 10 Feb 2019, at 06:00, Steve Kargl <sgk at
>>>> troutmask.apl.washington.edu> wrote:
>>>>
>>>> How did you arrive at the conclusion that this has anything to do with
>>>> the specific compiler? From these errors, I think it is more likely
>>>> something in Qt5 that is erroneously convinced that those qt_memfillXY
>>>> functions exist. Or they get referenced, but not compiled at all, for
>>>> some reason.
>>>>
>>>
>>> If I have "CFLAGS+= -march=i686 -mmmx -msse" in /etc/make.conf
>>> qt5-gui builds without issue. If I add -msse2 to CFLAGS, then
>>> the build dies.
>>>
>>> So, either clang is miscompiling qt5-gui with -mmse2 or the
>>> qt5-gui port is being too smart for its own good.
>>
>> That lead to an old memory of getting results like ((armv6
>> time frame I think, before the armv7 addition to FreeBSD):
>>
>> image/qimage.cpp:(.text+0x1e14): undefined reference to
>> `qt_memfill32(unsigned int*, unsigned int, int)'
>> image/qimage.cpp:(.text+0x1f34): undefined reference to
>> `qt_memfill32(unsigned int*, unsigned int, int)'
>>
>> where it turned out that arm NEON was not supported by various
>> parts of qt5.
>>
>
> It is definitely some problem between clang and the qt5-gui
> port. It seems qt5-gui tries to auto-detect sse2. Don't
> know if qt5-gui has a bogus auto-detect code, clang miscompiles
> the auto-detect code, or FreeBSD is lying about the features
> of my cpu (although x86info says it found sse2). In poking
> around the qt5-gui sources, I found that configure can be
> given a -sse2 argument. I tried to force sse2, but I'm seeing
> qt5-gui is doing
>
> % find qtbase-everywhere-src-5.12.0 -name config.\* | xargs grep -i sse2
> qtbase-everywhere-src-5.12.0/config.log:Command line: -no-eglfs -sse2
> -no-evdev -no-libudev -system-harfbuzz -c++std c++14 -opensource
> -confirm-license -no-pch -prefix /usr/local -bindir /usr/local/lib/qt5/bin
> -headerdir /usr/local/include/qt5 -libdir /usr/local/lib/qt5 -plugindir
> /usr/local/lib/qt5/plugins -importdir /usr/local/lib/qt5/imports -datadir
> /usr/local/share/qt5 -docdir /usr/local/share/doc/qt5 -translationdir
> /usr/local/share/qt5/translations -sysconfdir /usr/local/etc/xdg -nomake
> examples -nomake tests -platform freebsd-clang -archdatadir
> /usr/local/lib/qt5 -libexecdir /usr/local/libexec/qt5 -qmldir
> /usr/local/lib/qt5/qml -examplesdir /usr/local/share/examples/qt5 -testsdir
> /usr/local/share/qt5/tests -no-sse2 -no-use-gold-linker -recheck-all -release
> -no-separate-debug-info
> qtbase-everywhere-src-5.12.0/config.opt:-sse2
> qtbase-everywhere-src-5.12.0/config.opt:-no-sse2
>
> Note my -sse2 is followed by a -no-sse2!
FYI: from the "24 May 2015 16:41:17" check in
description:
Qt 5.3 removed runtime detection of SSE2 so it needs to be configured
with -no-sse2 at buildtime on i386.
PR: 198738, 200258
Reported by: sasamotik...@gmail.com
Approved by: maintainer timeout (2 weeks)
===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
_______________________________________________
freebsd-toolchain@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain
To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
