9.518 log10

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

Gnulib module: log10 or log10-ieee

Portability problems fixed by either Gnulib module log10 or log10-ieee:

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

Portability problems fixed by Gnulib module log10-ieee:

• This function returns a wrong value for a negative argument on some platforms: NetBSD 5.1, Solaris 11 2011-11.

Portability problems not fixed by Gnulib: