Mercurial > gnulib
view m4/printf-frexp.m4 @ 40177:dcd889592b62
dtoastr,ftoastr,ldtoastr: port to c-strtod changes
Decouple these modules from c-strtod. Nowadays it’s reasonable to
assume the C99 signatures for strtod and strtold. Programs that
require stricter adherence to C99 should also use the strtod and
strtold modules as needed, and we no longer need the
HAVE_C99_STRTOLD macro.
* NEWS: Mention this.
* lib/ftoastr.c (STRTOF) [LENGTH == 3]: Assume strtold.
* m4/c-strtod.m4 (gl_C_STRTOLD): Do not define HAVE_C99_STRTOLD.
* modules/dtoastr, modules/ftoastr, modules/ldtoastr:
(Files): Remove m4/c-strtod.m4.
(configure.ac): Do not require gl_C99_STRTOLD, which no longer
exists.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 02 Feb 2019 13:01:55 -0800 |
parents | b06060465f09 |
children |
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# printf-frexp.m4 serial 5 dnl Copyright (C) 2007, 2009-2019 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. dnl Check how to define printf_frexp() without linking with libm. AC_DEFUN([gl_FUNC_PRINTF_FREXP], [ AC_REQUIRE([gl_CHECK_FREXP_NO_LIBM]) if test $gl_cv_func_frexp_no_libm = yes; then gl_FUNC_FREXP_WORKS case "$gl_cv_func_frexp_works" in *yes) AC_DEFINE([HAVE_FREXP_IN_LIBC], [1], [Define if the frexp function is available in libc.]) ;; esac fi AC_CACHE_CHECK([whether ldexp can be used without linking with libm], [gl_cv_func_ldexp_no_libm], [ AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include <math.h> double x; int y;]], [[return ldexp (x, y) < 1;]])], [gl_cv_func_ldexp_no_libm=yes], [gl_cv_func_ldexp_no_libm=no]) ]) if test $gl_cv_func_ldexp_no_libm = yes; then AC_DEFINE([HAVE_LDEXP_IN_LIBC], [1], [Define if the ldexp function is available in libc.]) fi ])