Created attachment 428292 [details] build.log.xz /var/tmp/portage/net-libs/webkit-gtk-2.10.8/work/webkitgtk-2.10.8/Source/JavaScriptCore/runtime/Options.cpp:613:67: error: use of undeclared identifier 'isnan' return (m_entry.doubleVal == other.m_entry.doubleVal) || (isnan(m_entry.doubleVal) && isnan(other.m_entry.doubleVal)); ^ /var/tmp/portage/net-libs/webkit-gtk-2.10.8/work/webkitgtk-2.10.8/Source/JavaScriptCore/runtime/Options.cpp:613:95: error: use of undeclared identifier 'isnan' return (m_entry.doubleVal == other.m_entry.doubleVal) || (isnan(m_entry.doubleVal) && isnan(other.m_entry.doubleVal));
Created attachment 428294 [details, diff] webkit-gtk-2.10.8_fix_clang.patch
This seems to be fixed in trunk already and proposed for 2.10.9: https://lists.webkit.org/pipermail/webkit-gtk/2016-March/002658.html
2.10.9 in the tree