[webkit-gtk] webkitgtk-2.0.4 compilation fails

[John Frankish]

When trying to compile webkitgtk-2.0.4 with gtk+-3.8.4 and gcc-4.7.2, the compilation fails with:

  CXXLD  Programs/WebKit2APITests/TestBackForwardList
./.libs/libwebkit2gtk-3.0.so: undefined reference to `__sync_add_and_fetch_8'
collect2: error: ld returned 1 exit status
./.libs/libwebkit2gtk-3.0.so: undefined reference to `__sync_add_and_fetch_8'
collect2: error: ld returned 1 exit status
make[1]: *** [Programs/WebKit2APITests/TestBackForwardList] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: *** [Programs/WebKit2APITests/TestContextMenu] Error 1
./.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.

Regards
John