dlsym
=====

POSIX specification: http://www.opengroup.org/susv3xsh/dlsym.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: mingw, Interix 3.5, BeOS.

  * The visibility of symbols loaded in dependent shared libraries or present in the main executable is system dependent.