strtod
======

POSIX specification:
 http://www.opengroup.org/onlinepubs/9699919799/functions/strtod.html

Gnulib module: strtod

Portability problems fixed by Gnulib:

  * This function is missing on some old platforms.

  * This function mis-parses strings with leading + on some old platforms: Old versions of Linux.

  * This function returns a wrong end pointer on some old platforms.

  * This function consumes whitespace even when there is nothing that should be parsed on some platforms: IRIX 6.5, OSF/1 5.1.

  * This function allows whitespace between e and the exponent on some platforms: HP-UX 11.11, IRIX 6.5, OSF/1 4.0.

  * This function returns the wrong end pointer for -0x on some platforms: glibc 2.4, MacOS X 10.5, FreeBSD 6.2, AIX 7.1, Cygwin < 1.5.25-11.

  * This function returns +0.0 (not -0.0) for -0 on some platforms: IRIX 6.5, OSF/1 4.0.

  * This function fails to parse Infinities and plain NaNs on some platforms: OpenBSD 4.0, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw.

  * This function fails to parse NaN() on some platforms: glibc-2.3.6, MacOS X 10.5, FreeBSD 6.2, OpenBSD 4.0, AIX 7.1, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Cygwin < 1.5.25-11, mingw.

  * This function fails to parse NaN(N-CHAR-SEQUENCE) on some platforms: OpenBSD 4.0, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, mingw.

  * This function parses NaN(N-CHAR-SEQUENCE), but returns the wrong end pointer on some platforms: glibc-2.4, AIX 7.1.

  * This function fails to parse C99 hexadecimal floating point on some platforms: NetBSD 3.0, OpenBSD 4.0, AIX 5.1, HP-UX 11.11, IRIX 6.5, OSF/1 5.1, Solaris 10, mingw.

  * This function returns the wrong end pointer for 0x1p on some platforms: AIX 7.1.

Portability problems not fixed by Gnulib:

  * This function returns +0.0 (not -0.0) for negative underflow on some platforms: glibc 2.7, Cygwin 1.5.x, mingw.

  * This function cannot distinguish between ``nan'' and ``-nan'' on some platforms: glibc 2.7, IRIX 6.5, OSF/1 5.1, mingw.

  * This function fails to correctly parse very long strings on some platforms: MacOS X 10.5, FreeBSD 6.2, NetBSD 3.0, OpenBSD 4.0, IRIX 6.5, OSF/1 5.1, Cygwin, mingw.

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