tdelete
=======

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/tdelete.html

Gnulib module: tsearch

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: Minix 3.1.8, mingw, MSVC 9, BeOS.

  * tdelete returns NULL when removing the last element of a tree on some platforms: OpenBSD 4.0.

Portability problems not fixed by Gnulib: