5 POSIX specification: @url{http://www.opengroup.org/onlinepubs/9699919799/functions/dlsym.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
17 mingw, Interix 3.5, BeOS.
19 The visibility of symbols loaded in dependent shared libraries or present
20 in the main executable is system dependent.