log10
=====

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/log10.html

Gnulib module: log10

Portability problems fixed by Gnulib:

  * This function returns a wrong value for a minus zero argument on some platforms: OSF/1 5.1.

Portability problems not fixed by Gnulib: