The new webkit.org does a mostly good job of featuring all ports, but it's not complete. Review the Getting Started, Building WebKit, and Running WebKit pages to make sure we have accurate build instructions for the EFL port.
Closing this bug because the EFL port has been removed from trunk. If you feel this bug applies to a different upstream WebKit port and was closed in error, please either update the title and reopen the bug, or leave a comment to request this.