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| author | Paul Eggert <eggert@cs.ucla.edu> | 2018-08-01 16:08:26 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2018-08-01 19:07:43 -0700 |
| commit | 80d1e8623ac79431a51f617871b7fdc5d28ef917 (patch) | |
| tree | 4209952a8037415be99bf33e9f8c557019e1e32b /m4/ieee754-h.m4 | |
| parent | 66b99e52592359712824ad9a23bfcc14e55ba758 (diff) | |
| download | gnulib-80d1e8623ac79431a51f617871b7fdc5d28ef917.tar.gz | |
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.
Diffstat (limited to 'm4/ieee754-h.m4')
| -rw-r--r-- | m4/ieee754-h.m4 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/m4/ieee754-h.m4 b/m4/ieee754-h.m4 new file mode 100644 index 0000000000..bf7c332e48 --- /dev/null +++ b/m4/ieee754-h.m4 @@ -0,0 +1,21 @@ +# Configure ieee754-h module + +dnl Copyright 2018 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +AC_DEFUN([gl_IEEE754_H], +[ + AC_REQUIRE([AC_C_BIGENDIAN]) + AC_CHECK_HEADERS_ONCE([ieee754.h]) + if test $ac_cv_header_ieee754_h = yes; then + IEEE754_H= + else + IEEE754_H=ieee754.h + AC_DEFINE([_GL_REPLACE_IEEE754_H], 1, + [Define to 1 if <ieee754.h> is missing.]) + fi + AC_SUBST([IEEE754_H]) + AM_CONDITIONAL([GL_GENERATE_IEEE754_H], [test -n "$IEEE754_H"]) +]) |