--- a/ChangeLog	Sat Feb 02 08:04:06 2019 -0800
+++ b/ChangeLog	Sat Feb 02 13:01:55 2019 -0800
@@ -1,3 +1,19 @@
+2019-02-02  Paul Eggert  <eggert@cs.ucla.edu>
+
+	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.
+
 2019-02-02  Bruno Haible  <bruno@clisp.org>
 
 	fma: Improve code style.

--- a/NEWS	Sat Feb 02 08:04:06 2019 -0800
+++ b/NEWS	Sat Feb 02 13:01:55 2019 -0800
@@ -48,6 +48,10 @@
 
 Date        Modules         Changes
 
+2019-02-02  c-strtod        This and related modules no longer define
+                            the HAVE_C99_STRTOLD macro.  Programs requiring
+                            standard strtold should use the strtold module.
+
 2019-01-21  diacrit         This module is deprecated. Please use the module
                             uninorm/canonical-decomposition instead.
 

--- a/lib/ftoastr.c	Sat Feb 02 08:04:06 2019 -0800
+++ b/lib/ftoastr.c	Sat Feb 02 13:01:55 2019 -0800
@@ -40,9 +40,7 @@
 # define FLOAT_PREC_BOUND _GL_LDBL_PREC_BOUND
 # define FTOASTR ldtoastr
 # define PROMOTED_FLOAT long double
-# if HAVE_C99_STRTOLD
-#  define STRTOF strtold
-# endif
+# define STRTOF strtold
 #elif LENGTH == 2
 # define FLOAT double
 # define FLOAT_DIG DBL_DIG
@@ -63,7 +61,7 @@
 # endif
 #endif
 
-/* On pre-C99 hosts, approximate strtof and strtold with strtod.  This
+/* On pre-C99 hosts, approximate strtof with strtod.  This
    may generate one or two extra digits, but that's better than not
    working at all.  */
 #ifndef STRTOF

--- a/m4/c-strtod.m4	Sat Feb 02 08:04:06 2019 -0800
+++ b/m4/c-strtod.m4	Sat Feb 02 13:01:55 2019 -0800
@@ -1,4 +1,4 @@
-# c-strtod.m4 serial 17
+# c-strtod.m4 serial 18
 
 # Copyright (C) 2004-2006, 2009-2019 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation
@@ -47,7 +47,5 @@
 [
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   AC_REQUIRE([gt_FUNC_USELOCALE])
-  AC_DEFINE([HAVE_C99_STRTOLD], [1],
-    [Define to 1 because the gnulib 'strtold' module provides a C99-conforming strtold function.])
   AC_CHECK_FUNCS([strtold_l])
 ])

--- a/modules/dtoastr	Sat Feb 02 08:04:06 2019 -0800
+++ b/modules/dtoastr	Sat Feb 02 13:01:55 2019 -0800
@@ -5,14 +5,12 @@
 lib/ftoastr.h
 lib/ftoastr.c
 lib/dtoastr.c
-m4/c-strtod.m4
 
 Depends-on:
 extensions
 intprops
 
 configure.ac:
-AC_REQUIRE([gl_C99_STRTOLD])
 
 Makefile.am:
 lib_SOURCES += dtoastr.c

--- a/modules/ftoastr	Sat Feb 02 08:04:06 2019 -0800
+++ b/modules/ftoastr	Sat Feb 02 13:01:55 2019 -0800
@@ -4,7 +4,6 @@
 Files:
 lib/ftoastr.h
 lib/ftoastr.c
-m4/c-strtod.m4
 
 Depends-on:
 extensions
@@ -12,7 +11,6 @@
 
 configure.ac:
 AC_CHECK_FUNCS_ONCE([strtof])
-AC_REQUIRE([gl_C99_STRTOLD])
 
 Makefile.am:
 lib_SOURCES += ftoastr.c

--- a/modules/ldtoastr	Sat Feb 02 08:04:06 2019 -0800
+++ b/modules/ldtoastr	Sat Feb 02 13:01:55 2019 -0800
@@ -5,14 +5,12 @@
 lib/ftoastr.h
 lib/ftoastr.c
 lib/ldtoastr.c
-m4/c-strtod.m4
 
 Depends-on:
 extensions
 intprops
 
 configure.ac:
-AC_REQUIRE([gl_C99_STRTOLD])
 
 Makefile.am:
 lib_SOURCES += ldtoastr.c