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diff --git a/lib/limits.in.h b/lib/limits.in.h
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+/* A GNU-like <limits.h>.
+
+   Copyright 2016-2018 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; either version 3, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _@GUARD_PREFIX@_LIMITS_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* The include_next requires a split double-inclusion guard.  */
+#@INCLUDE_NEXT@ @NEXT_LIMITS_H@
+
+#ifndef _@GUARD_PREFIX@_LIMITS_H
+#define _@GUARD_PREFIX@_LIMITS_H
+
+/* For HP-UX 11.31.  */
+#if defined LONG_LONG_MIN && !defined LLONG_MIN
+# define LLONG_MIN LONG_LONG_MIN
+#endif
+#if defined LONG_LONG_MAX && !defined LLONG_MAX
+# define LLONG_MAX LONG_LONG_MAX
+#endif
+#if defined ULONG_LONG_MAX && !defined ULLONG_MAX
+# define ULLONG_MAX ULONG_LONG_MAX
+#endif
+
+/* The number of usable bits in an unsigned or signed integer type
+   with minimum value MIN and maximum value MAX, as an int expression
+   suitable in #if.  Cover all known practical hosts.  This
+   implementation exploits the fact that MAX is 1 less than a power of
+   2, and merely counts the number of 1 bits in MAX; "COBn" means
+   "count the number of 1 bits in the low-order n bits").  */
+#define _GL_INTEGER_WIDTH(min, max) (((min) < 0) + _GL_COB128 (max))
+#define _GL_COB128(n) (_GL_COB64 ((n) >> 31 >> 31 >> 2) + _GL_COB64 (n))
+#define _GL_COB64(n) (_GL_COB32 ((n) >> 31 >> 1) + _GL_COB32 (n))
+#define _GL_COB32(n) (_GL_COB16 ((n) >> 16) + _GL_COB16 (n))
+#define _GL_COB16(n) (_GL_COB8 ((n) >> 8) + _GL_COB8 (n))
+#define _GL_COB8(n) (_GL_COB4 ((n) >> 4) + _GL_COB4 (n))
+#define _GL_COB4(n) (!!((n) & 8) + !!((n) & 4) + !!((n) & 2) + !!((n) & 1))
+
+/* Macros specified by ISO/IEC TS 18661-1:2014.  */
+
+#if (! defined ULLONG_WIDTH                                             \
+     && (defined _GNU_SOURCE || defined __STDC_WANT_IEC_60559_BFP_EXT__))
+# define CHAR_WIDTH _GL_INTEGER_WIDTH (CHAR_MIN, CHAR_MAX)
+# define SCHAR_WIDTH _GL_INTEGER_WIDTH (SCHAR_MIN, SCHAR_MAX)
+# define UCHAR_WIDTH _GL_INTEGER_WIDTH (0, UCHAR_MAX)
+# define SHRT_WIDTH _GL_INTEGER_WIDTH (SHRT_MIN, SHRT_MAX)
+# define USHRT_WIDTH _GL_INTEGER_WIDTH (0, USHRT_MAX)
+# define INT_WIDTH _GL_INTEGER_WIDTH (INT_MIN, INT_MAX)
+# define UINT_WIDTH _GL_INTEGER_WIDTH (0, UINT_MAX)
+# define LONG_WIDTH _GL_INTEGER_WIDTH (LONG_MIN, LONG_MAX)
+# define ULONG_WIDTH _GL_INTEGER_WIDTH (0, ULONG_MAX)
+# define LLONG_WIDTH _GL_INTEGER_WIDTH (LLONG_MIN, LLONG_MAX)
+# define ULLONG_WIDTH _GL_INTEGER_WIDTH (0, ULLONG_MAX)
+#endif /* !ULLONG_WIDTH && (_GNU_SOURCE || __STDC_WANT_IEC_60559_BFP_EXT__) */
+
+#endif /* _@GUARD_PREFIX@_LIMITS_H */
+#endif /* _@GUARD_PREFIX@_LIMITS_H */