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ieee754-h: new module It looks like Emacs can use this for some NaN processing. Emacs uses it only on double NaNs so it should be safe. * MODULES.html.sh (func_all_modules): Add ieee754-h. * config/srclist.txt: Mention ieee754.h in a comment. * doc/glibc-headers/ieee754.texi (ieee754.h): Gnulib now has a substitute that should work except for long double and for non-IEEE platforms. * lib/ieee754.in.h, m4/ieee754-h.m4, modules/ieee754-h: * modules/ieee754-h-tests, tests/test-ieee754-h.c: New files.
author Paul Eggert <eggert@cs.ucla.edu>
date Wed, 01 Aug 2018 16:08:26 -0700
parents 41bd1e8f88b2
children d4661c7ea0d0
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@node ieee754.h
@section @file{ieee754.h}

Defines the types @code{union ieee754_float}, @code{union ieee754_double},
@code{union ieee854_long_double}.

Gnulib module: ---

Portability problems fixed by Gnulib:
@itemize
@item
This header file is missing on all non-glibc platforms:
Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 11.3, Cygwin, mingw, MSVC 14, Interix 3.5, BeOS, Android 9.0.
@end itemize

Portability problems not fixed by Gnulib:
@itemize
@item
The substitute for this header file has not been tested for @code{long
double} and does not work on some platforms.

@item
The substitute for this header file returns nonsense on (now-quite-rare)
platforms that do not use IEEE floating point.
@end itemize