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Date:      Wed, 03 Jul 2024 16:00:37 +0000
From:      bugzilla-noreply@freebsd.org
To:        desktop@FreeBSD.org
Subject:   [Bug 275914] www/webkit2-gtk{3,4}: Flavorize?: Deal with 4.0, 4.1 and 6.0 SONAMEs
Message-ID:  <bug-275914-39348-XNWmpKL5Hg@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-275914-39348@https.bugs.freebsd.org/bugzilla/>
References:  <bug-275914-39348@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275914

--- Comment #28 from Charlie Li <vishwin@freebsd.org> ---
Got 2.42 built with USE_GCC with only the Source/WebCore/platform/network/D=
NS.h
(adds needed <sys/socket.h> include) and
Source/UI/WebProcess/Launcher/glib/ProcessLauncherGLib.cpp patches on -CURR=
ENT.
Runtime, on the last upstream www/epiphany that uses the 4.1 API, still
exhibits an indefinite wait behaviour. Should probably test with the latest
upstream epiphany that uses the 6.0 API however.

2.44 specifically fails whilst building the Layer-Based SVG Engine (LBSE) u=
nder
both GCC and clang. Downcasts that haven't really changed from the legacy S=
VG
engine are no longer resolving (one example shown):

FAILED:
Source/WebCore/CMakeFiles/WebCore.dir/rendering/svg/RenderSVGResourceLinear=
Gradient.cpp.o
[snip]
In file included from
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/St=
dLibExtras.h:38,
                 from
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/Fa=
stMalloc.h:26,
                 from
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/webkitgtk-2.44.2/Source/W=
ebCore/config.h:47,
                 from
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/webkitgtk-2.44.2/Source/W=
ebCore/rendering/svg/RenderSVGResourceLinearGradient.cpp:22:
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/Ty=
peCasts.h:
In instantiation of 'static bool WTF::TypeCastTraits<ExpectedType, ArgType,
isBaseType>::isOfType(ArgType&) [with ExpectedType =3D const
WebCore::SVGLinearGradientElement; ArgType =3D const WebCore::SVGElement; b=
ool
isBaseType =3D false]':
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/Ty=
peCasts.h:58:71:
  required from 'bool WTF::is(const ArgType&) [with ExpectedType =3D
WebCore::SVGLinearGradientElement; ArgType =3D WebCore::SVGElement]'
   58 |     return TypeCastTraits<const ExpectedType, const
ArgType>::isOfType(source);
      |=20=20=20=20=20=20=20=20=20=20=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/Ty=
peCasts.h:120:5:
  required from 'WTF::match_constness_t<Source, Target>& WTF::downcast(Sour=
ce&)
[with Target =3D WebCore::SVGLinearGradientElement; Source =3D WebCore::SVG=
Element;
match_constness_t<Source, Target> =3D WebCore::SVGLinearGradientElement]'
  120 |     ASSERT_WITH_SECURITY_IMPLICATION(is<Target>(source));
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/webkitgtk-2.44.2/Source/W=
ebCore/rendering/svg/RenderSVGResourceLinearGradientInlines.h:36:46:
  required from here
   36 |     return
downcast<SVGLinearGradientElement>(RenderSVGResourceContainer::element());
      |=20=20=20=20=20=20=20=20=20=20=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/Ty=
peCasts.h:41:28:
error: static assertion failed: Missing TypeCastTraits specialization
   41 |         static_assert(std::is_void_v<ExpectedType>, "Missing
TypeCastTraits specialization");
      |                       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/wrkdirs/overlays/overlay/www/webkit2-gtk/work-40/.build/WTF/Headers/wtf/Ty=
peCasts.h:41:28:
note: 'std::is_void_v<const WebCore::SVGLinearGradientElement>' evaluates to
false

These apparently resolve on Linux and other platforms. In the meantime ther=
e is
a private ENABLE_LAYER_BASED_SVG_ENGINE that is enabled for GTK by default,
going to try disabling it here.

--=20
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