Imported Upstream version 1.23.0

[platform/upstream/groff.git] / lib / isnan.c

diff --git a/lib/isnan.c b/lib/isnan.c
index a25c882..39e193b 100644 (file)
--- a/lib/isnan.c
+++ b/lib/isnan.c
@@ -1,17 +1,17 @@
 /* Test for NaN that does not need libm.
-   Copyright (C) 2007-2018 Free Software Foundation, Inc.
+   Copyright (C) 2007-2023 Free Software Foundation, Inc.
 
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
 
-   This program is distributed in the hope that it will be useful,
+   This file 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 General Public License for more details.
+   GNU Lesser General Public License for more details.
 
-   You should have received a copy of the GNU General Public License
+   You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
@@ -82,9 +82,10 @@ typedef union { DOUBLE value; unsigned int word[NWORDS]; } memory_double;
 /* Most hosts nowadays use IEEE floating point, so they use IEC 60559
    representations, have infinities and NaNs, and do not trap on
    exceptions.  Define IEEE_FLOATING_POINT if this host is one of the
-   typical ones.  The C11 macro __STDC_IEC_559__ is close to what is
+   typical ones.  The C23 macro __STDC_IEC_60559_BFP__ macro (or its cousin,
+   the now-obsolescent C11 macro __STDC_IEC_559__) is close to what is
    wanted here, but is not quite right because this file does not require
-   all the features of C11 Annex F (and does not require C11 at all,
+   all the features of C23 Annex F (and works even with pre-C11 platforms,
    for that matter).  */
 
 #define IEEE_FLOATING_POINT (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \