@node abs
@section @code{abs}
@findex abs

POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/abs.html}

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Android 4.3.
@end itemize
