strtold
=======

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

Gnulib module: strtold

Portability problems fixed by Gnulib:

  * This function is missing on some platforms: NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, older IRIX 6.5, Solaris 9, older Cygwin, MSVC 9, Android 4.4.

  * This function returns a struct, not a long double, on some platforms: HP-UX 11.31/hppa.

  * This function consumes whitespace even when there is nothing that should be parsed on some platforms: IRIX 6.5.

  * This function allows whitespace between e and the exponent on some platforms: HP-UX 11.31/ia64, IRIX 6.5.

  * This function returns the wrong end pointer for -0x on some platforms: glibc-2.3.2, Mac OS X 10.5, Haiku.

  * This function returns +0.0 (not -0.0) for -0 on some platforms: IRIX 6.5.

  * This function fails to parse Infinities and plain NaNs on some platforms: HP-UX 11.31/ia64, IRIX 6.5.

  * This function fails to parse NaN() on some platforms: glibc-2.3.2, IRIX 6.5, mingw, Haiku.

  * This function fails to parse NaN(N-CHAR-SEQUENCE) on some platforms: IRIX 6.5.

  * This function parses NaN(N-CHAR-SEQUENCE), but returns the wrong end pointer on some platforms: glibc-2.3.2, mingw, Haiku.

  * This function fails to parse C99 hexadecimal floating point on some platforms: IRIX 6.5, mingw.

  * In hexadecimal floats, this function allows whitespace between p and the exponent on some platforms: HP-UX 11.31/ia64.

  * This function fails to set errno upon underflow on some platforms: Cygwin 2.9.

Portability problems not fixed by Gnulib:

  * The replacement function does not always return correctly rounded results.