Created attachment 644211 [details] [diff] [review]
This and attachment 644212 [details] [diff] [review] at bug 775866 are required to build Tb with system ply.
Created attachment 653147 [details] [diff] [review]
Port after c-c 3b75111da3ba ( Final part of bug 781446 - Port bug 742795 - autogenerate autoconf.mk. r=KaiRo)
Fit to the latest c-c.