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.

# expm1-ieee.m4 serial 1
dnl Copyright (C) 2012-2019 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 This macro is in a separate file (not in expm1.m4 and not inlined in the
dnl module description), so that gl_FUNC_EXPM1 can test whether 'aclocal' has
dnl found uses of this macro.

AC_DEFUN([gl_FUNC_EXPM1_IEEE],
[
  m4_divert_text([INIT_PREPARE], [gl_expm1_required=ieee])
  AC_REQUIRE([gl_FUNC_EXPM1])
])