thanks for the answers, dave and saen
ok, i understand the following..
In this case if the Tvheadend configure script can't find the strl... functions it includes code which does the same thing (src/tvh_string.h)
but should ./configure then not rather say something like it does with "libiconv"in my case?
^ using build-in whatnot whatsoever routines
so, i tried also the following packages.. without success:
- libbsd-dev
- libtsan0
(which were already installed.. so no impact on the "fails")
so, in this case: any chances that ./configure could be updated by a pro? :)