5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/atof.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
20 This function mis-parses strings with leading @samp{+} on some old platforms:
21 Old versions of Linux.
24 This function returns a positive value for negative underflow on some
26 glibc 2.4, Mingw, Cygwin.
29 This function fails to do a valid parse of @samp{-0x} on some
31 glibc 2.4, Cygwin < 1.5.25-11.
34 This function fails to parse Infinities and plain NaNs on some platforms:
38 This function fails to parse NaN() on some platforms:
39 Mingw, OpenBSD 4.0, Cygwin < 1.5.25-11.
42 This function fails to parse NaN(n-char-sequence) on some platforms:
46 This function fails to parse C99 hexadecimal floating point on some
51 This function fails to correctly parse very long strings on some