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diff --git a/stdlib/tst-strtod.h b/stdlib/tst-strtod.h
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+/* Common utilities for testing strtod and its derivatives.
+ This file is part of the GNU C Library.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _TST_STRTOD_H
+#define _TST_STRTOD_H
+
+#define FSTRLENMAX 128
+
+/* Splat n variants of the same test for the various strtod functions. */
+#define GEN_TEST_STRTOD_FOREACH(mfunc) \
+ mfunc ( f, float, snprintf, "", f, f) \
+ mfunc ( d, double, snprintf, "", , ) \
+ mfunc ( ld, long double, snprintf, "L", L, l)
+/* The arguments to the generated macros are:
+ FSUF - Function suffix
+ FTYPE - float type
+ FTOSTR - float to string func
+ FTOSTRM - Optional modifier for FTOSTR format
+ LSUF - Literal suffix
+ CSUF - C standardish suffix for many of the math functions
+*/
+
+
+
+#define STRTOD_TEST_FOREACH(mfunc, ...) \
+({ \
+ int result = 0; \
+ result |= mfunc ## f (__VA_ARGS__); \
+ result |= mfunc ## d (__VA_ARGS__); \
+ result |= mfunc ## ld (__VA_ARGS__); \
+ result; \
+})
+
+
+#endif