[webkit-gtk] webkitgtk-2.0.4 compilation fails

[Gavin Lambert]

Quoth John Frankish:
>>>   CXXLD  Programs/WebKit2APITests/TestBackForwardList
>>> ./.libs/libwebkit2gtk-3.0.so: undefined reference to 
>>> `__sync_add_and_fetch_8'
[...]
>>> Is this an illegal processor instruction? Webkitgtk and gtk+-3 are 
>>> being compiled for i486.
[...]
> CFLAGS="-march=i486 -mtune=i686 -Os -pipe  -fno-exceptions -fno-rtti "
> CXXFLAGS="-march=i486 -mtune=i686 -Os -pipe " ./configure --

Given “-march=i486 -mtune=i686”, I believe that add_and_fetch_8 is illegal.
The required CPU instruction (part of the double-word-CAS family) was only
implemented on Pentium and above.

Either you'll need to build with at least -march=i586 or someone will need
to change the code.

(And does anyone care about 486s any more?  I probably have one kicking
around somewhere but I don't use it -- at least not for web browsing.)  ;)