Build WebKit for Qt4.8.7 by GCC13.3

Creatorczyk · 12 Dec 2024, 13:09

Hi,
In buildroot from 2024 with Gcc 13.3 I added the "qt" package to build qt 4.8.7. Everything builds correctly. However, I have a problem after adding QtWebKit. During the build I get an error that doesn't tell me much. Below I am posting the configuration and the error from the terminal. Can anyone direct me on how to compile WebKit?

Config:

Debug .................. no
Qt 3 compatibility ..... no
QtDBus module .......... yes (run-time)
QtConcurrent code ...... yes
QtGui module ........... yes
QtScript module ........ yes
QtScriptTools module ... no
QtXmlPatterns module ... yes
Phonon module .......... no
Multimedia module ...... yes
SVG module ............. yes
WebKit module .......... yes
JavaScriptCore JIT ..... To be decided by JavaScriptCore
Declarative module ..... yes
Declarative debugging ...yes
Support for S60 ........ no
Symbian DEF files ...... no
STL support ............ yes
PCH support ............ no
MMX/3DNOW/SSE/SSE2/SSE3. no/no/no/no/no
SSSE3/SSE4.1/SSE4.2..... no/no/no
AVX..................... no
iWMMXt support ......... no
NEON support ........... yes
IPv6 support ........... yes
IPv6 ifname support .... yes
getaddrinfo support .... yes
getifaddrs support ..... yes
Accessibility .......... no
NIS support ............ no
CUPS support ........... no
Iconv support .......... no
Glib support ........... yes
GStreamer support ...... no
PulseAudio support ..... no
Large File support ..... yes
GIF support ............ no
TIFF support ........... no
JPEG support ........... plugin (qt)
PNG support ............ yes (qt)
MNG support ............ no
zlib support ........... yes
Session management ..... no
Embedded support ....... arm
Freetype2 support ...... yes
Graphics (qt) .......... linuxfb linuxfb qvfb
Graphics (plugin) ...... 
Decorations (qt) ....... styled windows default
Decorations (plugin) ... 
Keyboard driver (qt) ... linuxinput
Keyboard driver (plugin) .. 
Mouse driver (qt) ...... tslib
Mouse driver (plugin) .. 
OpenGL support ......... no
OpenVG support ......... no
OpenSSL support ........ no 
Alsa support ........... no
ICD support ............ no
libICU support ......... no
Use system proxies ..... no

Error:

../JavaScriptCore/wtf/RefCounted.h:141:13: warning: deleting object of polymorphic class type ‘WebCore::Frame’ which has non-virtual destructor might cause undefined behavior [-Wdelete-non-virtual-dtor]
  141 |             delete static_cast<T*>(this);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
../JavaScriptCore/wtf/Vector.h: In instantiation of ‘static void WTF::VectorMover<true, T>::move(const T*, const T*, T*) [with T = WTF::RefPtr<WebCore::Attribute>]’:
../JavaScriptCore/wtf/Vector.h:249:69:   required from ‘static void WTF::VectorTypeOperations<T>::move(const T*, const T*, T*) [with T = WTF::RefPtr<WebCore::Attribute>]’
../JavaScriptCore/wtf/Vector.h:926:37:   required from ‘void WTF::Vector<T, inlineCapacity>::shrinkCapacity(size_t) [with T = WTF::RefPtr<WebCore::Attribute>; unsigned int inlineCapacity = 0; size_t = unsigned int]’
dom/NamedNodeMap.h:73:56:   required from here
../JavaScriptCore/wtf/Vector.h:152:19: warning: ‘void* memcpy(void*, const void*, size_t)’ writing to an object of type ‘class WTF::RefPtr<WebCore::Attribute>’ with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess]
  152 |             memcpy(dst, src, reinterpret_cast<const char*>(srcEnd) - reinterpret_cast<const char*>(src));
      |             ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../JavaScriptCore/wtf/RefPtr.h:39:32: note: ‘class WTF::RefPtr<WebCore::Attribute>’ declared here
   39 |     template<typename T> class RefPtr {
      |                                ^~~~~~
make[3]: *** [Makefile.WebKit:79: sub-WebCore-make_default-ordered] Error 2
make[2]: *** [Makefile:635: sub-webkit-make_default-ordered] Error 2
make[1]: *** [package/pkg-generic.mk:283: /home/buildroot/output/build/qt-4.8.7/.stamp_built] Error 2
make: *** [Makefile:82: _all] Error 2

jsulm · 12 Dec 2024, 11:52

@Creatorczyk said in Build WebKit for Qt4.8.7 by GCC13.3:

"qt" package to build qt 4.8.7

Why do you want to build this ancient version which is not supported anymore since many years?

Creatorczyk · 12 Dec 2024, 13:01

@jsulm because I am moving an old project written in qt4.8.7 to a new embedded system.

JoeCFD · 12 Dec 2024, 13:12

@Creatorczyk You may need an old compiler to compile qt4.8.7. GCC13.3 might be too modern for qt4.8.7.

Creatorczyk · 12 Dec 2024, 13:35

@JoeCFD the problem is only when I want to add WebKit. Qt4.8.7 builds without problems

jsulm · wrote on 12 Dec 2024, 13:35

@Creatorczyk What is the first error message? What you posted only shows some warnings and notes.

Christian Ehrlicher · wrote on 12 Dec 2024, 17:23

Since gcc13 was not yet out when Qt4.8.7 was released some now stricter c++ requirements are in place. you have to fix them by yourself. There error message is clear here - you need a virtual dtor - add it.