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| author | Paul Eggert <eggert@cs.ucla.edu> | 2018-08-01 18:53:31 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2018-08-01 19:01:51 -0700 |
| commit | d216d7d248199aa6c99cd642116717c5b301ae6d (patch) | |
| tree | 687b9efadbb87fa1095fb0a2e0569e625856e15a /m4/ieee754-h.m4 | |
| parent | 2f37ecaefcc61b0bf389f1c1eb3ac1b15105f056 (diff) | |
| download | emacs-d216d7d248199aa6c99cd642116717c5b301ae6d.tar.gz emacs-d216d7d248199aa6c99cd642116717c5b301ae6d.tar.bz2 emacs-d216d7d248199aa6c99cd642116717c5b301ae6d.zip | |
Substitute a <ieee754.h> on hosts lacking it
* .gitignore: Add lib/ieee754.h.
* admin/merge-gnulib (GNULIB_MODULES): Add ieee754-h.
* configure.ac: Remove ieee754.h check, as Gnulib now does that.
* etc/NEWS: Mention this.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
* lib/ieee754.in.h, m4/ieee754-h.m4: New files, from Gnulib.
* src/lisp.h (IEEE_FLOATING_POINT): Now a macro so that it
can be used in #if.
* src/lread.c, src/print.c: Include <ieee754.h> if
IEEE_FLOATING_POINT, not if HAVE_IEEE754_H.
* src/lread.c (string_to_number):
* src/print.c (float_to_string):
Process NaNs only on IEEE hosts, and assume <ieee754.h>
in that case.
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 00000000000..bf7c332e48e --- /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"]) +]) |