See attached build log.
(Please do not complain about the need for looking at the build log until you can provide an easy way to open bugs with the correct data picked out of a tinderbox log. Thanks.)
Created attachment 242213 [details]
The tendra that is installed is not compiled by gcc, so the CFLAGS and LDFLAGS from portage cannot be used. The default needs to stay as it is, but if you want I can add an option to disable the bootstrapping and compile tcc only once, using gcc, and install that.