glibc/bits/long-double.h
Paul Eggert 2b778ceb40 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

54 lines
2.3 KiB
C

/* Properties of long double type.
Copyright (C) 2016-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* This header is included by <sys/cdefs.h>.
If long double is ABI-compatible with double, it should define
__NO_LONG_DOUBLE_MATH to 1; otherwise, it should leave
__NO_LONG_DOUBLE_MATH undefined.
If this build of the GNU C Library supports both long double
ABI-compatible with double and some other long double format not
ABI-compatible with double, it should define
__LONG_DOUBLE_MATH_OPTIONAL to 1; otherwise, it should leave
__LONG_DOUBLE_MATH_OPTIONAL undefined.
If __NO_LONG_DOUBLE_MATH is already defined, this header must not
define anything; this is needed to work with the definition of
__NO_LONG_DOUBLE_MATH in nldbl-compat.h. */
/* In the default version of this header, long double is
ABI-compatible with double. */
#ifndef __NO_LONG_DOUBLE_MATH
# define __NO_LONG_DOUBLE_MATH 1
#endif
/* The macro __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI is used to determine the
choice of the underlying ABI of long double. It will always assume
a constant value for each translation unit.
If the value is non-zero, any API which is parameterized by the long
double type (i.e the scanf/printf family of functions or the explicitly
parameterized math.h functions) will be redirected to a compatible
implementation using _Float128 ABI via symbols suffixed with ieee128.
The mechanism this macro uses to acquire may be a function
of architecture, or target specific options used to invoke the
compiler. */
#define __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI 0