Add <stdint.h> integer width macros

diff --git a/NEWS b/NEWS
index 0ea6bfa..51215d8 100644
--- a/NEWS
+++ b/NEWS
@@ -38,7 +38,16 @@  Version 2.25
 
 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
   CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
-  UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH.
+  UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
+  <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
+  INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
+  UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
+  INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
+  UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
+  UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
+  UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
+  UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
+  WINT_WIDTH.
 
 * The <sys/quota.h> header now includes the <linux/quota.h> header.  Support
   for the Linux quota interface which predates kernel version 2.4.22 has
diff --git a/manual/arith.texi b/manual/arith.texi
index 23b9373..dc3c367 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -110,7 +110,9 @@  minimum possible values for each integer data type.  The macro names
 follow these examples: @code{INT32_MAX}, @code{UINT8_MAX},
 @code{INT_FAST32_MIN}, @code{INT_LEAST64_MIN}, @code{UINTMAX_MAX},
 @code{INTMAX_MAX}, @code{INTMAX_MIN}.  Note that there are no macros for
-unsigned integer minima.  These are always zero.
+unsigned integer minima.  These are always zero.  Similiarly, there
+are macros such as @code{INTMAX_WIDTH} for the width of these types.
+Those macros for integer type widths come from TS 18661-1:2014.
 @cindex maximum possible integer
 @cindex minimum possible integer
 
diff --git a/manual/lang.texi b/manual/lang.texi
index 3705df0..ae7d5be 100644
--- a/manual/lang.texi
+++ b/manual/lang.texi
@@ -703,6 +703,38 @@  int}, @code{long long int} and @code{unsigned long long int},
 respectively.
 @end table
 
+Further such macros are defined in @file{stdint.h}.  Apart from those
+for types specified by width (@pxref{Integers}), the following are
+defined.
+
+@table @code
+@comment stdint.h
+@comment ISO
+@item INTPTR_WIDTH
+@comment stdint.h
+@comment ISO
+@itemx UINTPTR_WIDTH
+@comment stdint.h
+@comment ISO
+@itemx PTRDIFF_WIDTH
+@comment stdint.h
+@comment ISO
+@itemx SIG_ATOMIC_WIDTH
+@comment stdint.h
+@comment ISO
+@itemx SIZE_WIDTH
+@comment stdint.h
+@comment ISO
+@itemx WCHAR_WIDTH
+@comment stdint.h
+@comment ISO
+@itemx WINT_WIDTH
+
+These are the widths of the types @code{intptr_t}, @code{uintptr_t},
+@code{ptrdiff_t}, @code{sig_atomic_t}, @code{size_t}, @code{wchar_t}
+and @code{wint_t}, respectively.
+@end table
+
 @node Range of Type
 @subsection Range of an Integer Type
 @cindex integer type range
diff --git a/stdlib/Makefile b/stdlib/Makefile
index ccc9aae..de3ecbb 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -77,7 +77,8 @@  tests		:= tst-strtol tst-strtod testmb testrand testsort testdiv   \
 		   tst-tininess tst-strtod-underflow tst-tls-atexit	    \
 		   tst-setcontext3 tst-tls-atexit-nodelete		    \
 		   tst-strtol-locale tst-strtod-nan-locale tst-strfmon_l    \
-		   tst-quick_exit tst-thread-quick_exit tst-width
+		   tst-quick_exit tst-thread-quick_exit tst-width	    \
+		   tst-width-stdint
 tests-static	:= tst-secure-getenv
 ifeq ($(have-cxx-thread_local),yes)
 CFLAGS-tst-quick_exit.o = -std=c++11
diff --git a/stdlib/tst-width-stdint.c b/stdlib/tst-width-stdint.c
new file mode 100644
index 0000000..29b8b93
--- /dev/null
+++ b/stdlib/tst-width-stdint.c
@@ -0,0 +1,185 @@ 
+/* Test integer width macros in <stdint.h>.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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/>.  */
+
+#include <signal.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <wchar.h>
+
+#define CHECK_WIDTH(TYPE, MAX, WIDTH)					\
+  do									\
+    {									\
+      if ((MAX >> ((TYPE) -1 < 0 ? (WIDTH - 2) : (WIDTH - 1))) != 1)	\
+	{								\
+	  puts ("bad width of " #TYPE);					\
+	  result = 1;							\
+	}								\
+      else								\
+	puts ("width of " #TYPE " OK");					\
+    }									\
+  while (0)
+
+static int
+do_test (void)
+{
+  int result = 0;
+
+#ifndef INT8_WIDTH
+# error "missing INT8_WIDTH"
+#endif
+  CHECK_WIDTH (int8_t, INT8_MAX, INT8_WIDTH);
+#ifndef INT16_WIDTH
+# error "missing INT16_WIDTH"
+#endif
+  CHECK_WIDTH (int16_t, INT16_MAX, INT16_WIDTH);
+#ifndef INT32_WIDTH
+# error "missing INT32_WIDTH"
+#endif
+  CHECK_WIDTH (int32_t, INT32_MAX, INT32_WIDTH);
+#ifndef INT64_WIDTH
+# error "missing INT64_WIDTH"
+#endif
+  CHECK_WIDTH (int64_t, INT64_MAX, INT64_WIDTH);
+#ifndef UINT8_WIDTH
+# error "missing UINT8_WIDTH"
+#endif
+  CHECK_WIDTH (uint8_t, UINT8_MAX, UINT8_WIDTH);
+#ifndef UINT16_WIDTH
+# error "missing UINT16_WIDTH"
+#endif
+  CHECK_WIDTH (uint16_t, UINT16_MAX, UINT16_WIDTH);
+#ifndef UINT32_WIDTH
+# error "missing UINT32_WIDTH"
+#endif
+  CHECK_WIDTH (uint32_t, UINT32_MAX, UINT32_WIDTH);
+#ifndef UINT64_WIDTH
+# error "missing UINT64_WIDTH"
+#endif
+  CHECK_WIDTH (uint64_t, UINT64_MAX, UINT64_WIDTH);
+
+#ifndef INT_LEAST8_WIDTH
+# error "missing INT_LEAST8_WIDTH"
+#endif
+  CHECK_WIDTH (int_least8_t, INT_LEAST8_MAX, INT_LEAST8_WIDTH);
+#ifndef INT_LEAST16_WIDTH
+# error "missing INT_LEAST16_WIDTH"
+#endif
+  CHECK_WIDTH (int_least16_t, INT_LEAST16_MAX, INT_LEAST16_WIDTH);
+#ifndef INT_LEAST32_WIDTH
+# error "missing INT_LEAST32_WIDTH"
+#endif
+  CHECK_WIDTH (int_least32_t, INT_LEAST32_MAX, INT_LEAST32_WIDTH);
+#ifndef INT_LEAST64_WIDTH
+# error "missing INT_LEAST64_WIDTH"
+#endif
+  CHECK_WIDTH (int_least64_t, INT_LEAST64_MAX, INT_LEAST64_WIDTH);
+#ifndef UINT_LEAST8_WIDTH
+# error "missing UINT_LEAST8_WIDTH"
+#endif
+  CHECK_WIDTH (uint_least8_t, UINT_LEAST8_MAX, UINT_LEAST8_WIDTH);
+#ifndef UINT_LEAST16_WIDTH
+# error "missing UINT_LEAST16_WIDTH"
+#endif
+  CHECK_WIDTH (uint_least16_t, UINT_LEAST16_MAX, UINT_LEAST16_WIDTH);
+#ifndef UINT_LEAST32_WIDTH
+# error "missing UINT_LEAST32_WIDTH"
+#endif
+  CHECK_WIDTH (uint_least32_t, UINT_LEAST32_MAX, UINT_LEAST32_WIDTH);
+#ifndef UINT_LEAST64_WIDTH
+# error "missing UINT_LEAST64_WIDTH"
+#endif
+  CHECK_WIDTH (uint_least64_t, UINT_LEAST64_MAX, UINT_LEAST64_WIDTH);
+
+#ifndef INT_FAST8_WIDTH
+# error "missing INT_FAST8_WIDTH"
+#endif
+  CHECK_WIDTH (int_fast8_t, INT_FAST8_MAX, INT_FAST8_WIDTH);
+#ifndef INT_FAST16_WIDTH
+# error "missing INT_FAST16_WIDTH"
+#endif
+  CHECK_WIDTH (int_fast16_t, INT_FAST16_MAX, INT_FAST16_WIDTH);
+#ifndef INT_FAST32_WIDTH
+# error "missing INT_FAST32_WIDTH"
+#endif
+  CHECK_WIDTH (int_fast32_t, INT_FAST32_MAX, INT_FAST32_WIDTH);
+#ifndef INT_FAST64_WIDTH
+# error "missing INT_FAST64_WIDTH"
+#endif
+  CHECK_WIDTH (int_fast64_t, INT_FAST64_MAX, INT_FAST64_WIDTH);
+#ifndef UINT_FAST8_WIDTH
+# error "missing UINT_FAST8_WIDTH"
+#endif
+  CHECK_WIDTH (uint_fast8_t, UINT_FAST8_MAX, UINT_FAST8_WIDTH);
+#ifndef UINT_FAST16_WIDTH
+# error "missing UINT_FAST16_WIDTH"
+#endif
+  CHECK_WIDTH (uint_fast16_t, UINT_FAST16_MAX, UINT_FAST16_WIDTH);
+#ifndef UINT_FAST32_WIDTH
+# error "missing UINT_FAST32_WIDTH"
+#endif
+  CHECK_WIDTH (uint_fast32_t, UINT_FAST32_MAX, UINT_FAST32_WIDTH);
+#ifndef UINT_FAST64_WIDTH
+# error "missing UINT_FAST64_WIDTH"
+#endif
+  CHECK_WIDTH (uint_fast64_t, UINT_FAST64_MAX, UINT_FAST64_WIDTH);
+
+#ifndef INTPTR_WIDTH
+# error "missing INTPTR_WIDTH"
+#endif
+  CHECK_WIDTH (intptr_t, INTPTR_MAX, INTPTR_WIDTH);
+#ifndef UINTPTR_WIDTH
+# error "missing UINTPTR_WIDTH"
+#endif
+  CHECK_WIDTH (uintptr_t, UINTPTR_MAX, UINTPTR_WIDTH);
+
+#ifndef INTMAX_WIDTH
+# error "missing INTMAX_WIDTH"
+#endif
+  CHECK_WIDTH (intmax_t, INTMAX_MAX, INTMAX_WIDTH);
+#ifndef UINTMAX_WIDTH
+# error "missing UINTMAX_WIDTH"
+#endif
+  CHECK_WIDTH (uintmax_t, UINTMAX_MAX, UINTMAX_WIDTH);
+
+#ifndef PTRDIFF_WIDTH
+# error "missing PTRDIFF_WIDTH"
+#endif
+  CHECK_WIDTH (ptrdiff_t, PTRDIFF_MAX, PTRDIFF_WIDTH);
+#ifndef SIG_ATOMIC_WIDTH
+# error "missing SIG_ATOMIC_WIDTH"
+#endif
+  CHECK_WIDTH (sig_atomic_t, SIG_ATOMIC_MAX, SIG_ATOMIC_WIDTH);
+#ifndef SIZE_WIDTH
+# error "missing SIZE_WIDTH"
+#endif
+  CHECK_WIDTH (size_t, SIZE_MAX, SIZE_WIDTH);
+#ifndef WCHAR_WIDTH
+# error "missing WCHAR_WIDTH"
+#endif
+  CHECK_WIDTH (wchar_t, WCHAR_MAX, WCHAR_WIDTH);
+#ifndef WINT_WIDTH
+# error "missing WINT_WIDTH"
+#endif
+  CHECK_WIDTH (wint_t, WINT_MAX, WINT_WIDTH);
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
diff --git a/sysdeps/generic/stdint.h b/sysdeps/generic/stdint.h
index 4427627..5428dbc 100644
--- a/sysdeps/generic/stdint.h
+++ b/sysdeps/generic/stdint.h
@@ -22,7 +22,8 @@ 
 #ifndef _STDINT_H
 #define _STDINT_H	1
 
-#include <features.h>
+#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
+#include <bits/libc-header-start.h>
 #include <bits/wchar.h>
 #include <bits/wordsize.h>
 
@@ -307,4 +308,47 @@  typedef unsigned long long int	uintmax_t;
 #  define UINTMAX_C(c)	c ## ULL
 # endif
 
+#if __GLIBC_USE (IEC_60559_BFP_EXT)
+
+# define INT8_WIDTH 8
+# define UINT8_WIDTH 8
+# define INT16_WIDTH 16
+# define UINT16_WIDTH 16
+# define INT32_WIDTH 32
+# define UINT32_WIDTH 32
+# define INT64_WIDTH 64
+# define UINT64_WIDTH 64
+
+# define INT_LEAST8_WIDTH 8
+# define UINT_LEAST8_WIDTH 8
+# define INT_LEAST16_WIDTH 16
+# define UINT_LEAST16_WIDTH 16
+# define INT_LEAST32_WIDTH 32
+# define UINT_LEAST32_WIDTH 32
+# define INT_LEAST64_WIDTH 64
+# define UINT_LEAST64_WIDTH 64
+
+# define INT_FAST8_WIDTH 8
+# define UINT_FAST8_WIDTH 8
+# define INT_FAST16_WIDTH __WORDSIZE
+# define UINT_FAST16_WIDTH __WORDSIZE
+# define INT_FAST32_WIDTH __WORDSIZE
+# define UINT_FAST32_WIDTH __WORDSIZE
+# define INT_FAST64_WIDTH 64
+# define UINT_FAST64_WIDTH 64
+
+# define INTPTR_WIDTH __WORDSIZE
+# define UINTPTR_WIDTH __WORDSIZE
+
+# define INTMAX_WIDTH 64
+# define UINTMAX_WIDTH 64
+
+# define PTRDIFF_WIDTH __WORDSIZE
+# define SIG_ATOMIC_WIDTH 32
+# define SIZE_WIDTH __WORDSIZE
+# define WCHAR_WIDTH 32
+# define WINT_WIDTH 32
+
+#endif
+
 #endif /* stdint.h */