log10l
======

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/log10l.html

Gnulib module: log10l

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, HP-UX 11, older IRIX 6.5, Solaris 9, Cygwin, Android 4.4.

  * This function is only defined as a macro with arguments on some platforms: MSVC 14.

  * This function is not declared and does not work on some platforms: AIX 5.1.

  * This function returns an unnormalized negative infinity for a minus zero argument on some platforms: IRIX 6.5.

  * This function returns an unnormalized positive infinity for a positive infinite argument on some platforms: IRIX 6.5.

  * This function produces results which are accurate to only 16 digits on some platforms: NetBSD 8.0.

Portability problems not fixed by Gnulib: