10.24.173 isinf ¶
POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/functions/isinf.html
Gnulib module: isinf
Portability problems fixed by Gnulib:
- This macro is missing on some platforms:
AIX 5.1, Solaris 11.4.
Portability problems not fixed by Gnulib:
- This macro returns an unspecified result when given noncanonical values
such as unnormalized numbers, pseudo-denormals, pseudo-NaNs,
pseudo-Infinities, and pseudo-zeroes.