@node isinf
@subsection @code{isinf}
@findex isinf

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9799919799/functions/isinf.html}

Gnulib module: isinf
@mindex isinf

Portability problems fixed by Gnulib:
@itemize
@item
This macro is missing on some platforms:
AIX 5.1, Solaris 11.4.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This macro returns an unspecified result when given noncanonical values
such as unnormalized numbers, pseudo-denormals, pseudo-NaNs,
pseudo-Infinities, and pseudo-zeroes.
@end itemize
