Update gnulib files.

9 files changed, 146 insertions, 46 deletions

diff --git a/lib/gllib/Makefile.am b/lib/gllib/Makefile.am
index 05fc4a2..b59fab2 100644
--- a/lib/gllib/Makefile.am
+++ b/lib/gllib/Makefile.am
@@ -36,6 +36,7 @@ libgnu_la_LIBADD = $(lgl_LTLIBOBJS)
 libgnu_la_DEPENDENCIES = $(lgl_LTLIBOBJS)
 EXTRA_libgnu_la_SOURCES =
 libgnu_la_LDFLAGS = $(AM_LDFLAGS)
+libgnu_la_LDFLAGS += -no-undefined
 
 ## begin gnulib module arg-nonnull
 
@@ -106,6 +107,7 @@ stddef.h: stddef.in.h
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
 	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
 	      -e 's|@''NEXT_STDDEF_H''@|$(NEXT_STDDEF_H)|g' \
 	      -e 's|@''HAVE_WCHAR_T''@|$(HAVE_WCHAR_T)|g' \
 	      -e 's|@''REPLACE_NULL''@|$(REPLACE_NULL)|g' \
@@ -130,6 +132,7 @@ stdint.h: stdint.in.h
 	  sed -e 's/@''HAVE_STDINT_H''@/$(HAVE_STDINT_H)/g' \
 	      -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
 	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
 	      -e 's|@''NEXT_STDINT_H''@|$(NEXT_STDINT_H)|g' \
 	      -e 's/@''HAVE_SYS_TYPES_H''@/$(HAVE_SYS_TYPES_H)/g' \
 	      -e 's/@''HAVE_INTTYPES_H''@/$(HAVE_INTTYPES_H)/g' \
@@ -171,6 +174,7 @@ string.h: string.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
 	  sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
 	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
 	      -e 's|@''NEXT_STRING_H''@|$(NEXT_STRING_H)|g' \
 	      -e 's|@''GNULIB_MBSLEN''@|$(GNULIB_MBSLEN)|g' \
 	      -e 's|@''GNULIB_MBSNLEN''@|$(GNULIB_MBSNLEN)|g' \
@@ -204,6 +208,7 @@ string.h: string.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	      -e 's|@''GNULIB_STRCASESTR''@|$(GNULIB_STRCASESTR)|g' \
 	      -e 's|@''GNULIB_STRTOK_R''@|$(GNULIB_STRTOK_R)|g' \
 	      -e 's|@''GNULIB_STRERROR''@|$(GNULIB_STRERROR)|g' \
+	      -e 's|@''GNULIB_STRERROR_R''@|$(GNULIB_STRERROR_R)|g' \
 	      -e 's|@''GNULIB_STRSIGNAL''@|$(GNULIB_STRSIGNAL)|g' \
 	      -e 's|@''GNULIB_STRVERSCMP''@|$(GNULIB_STRVERSCMP)|g' \
 	      < $(srcdir)/string.in.h | \
@@ -223,6 +228,7 @@ string.h: string.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	      -e 's|@''HAVE_STRSEP''@|$(HAVE_STRSEP)|g' \
 	      -e 's|@''HAVE_STRCASESTR''@|$(HAVE_STRCASESTR)|g' \
 	      -e 's|@''HAVE_DECL_STRTOK_R''@|$(HAVE_DECL_STRTOK_R)|g' \
+	      -e 's|@''HAVE_DECL_STRERROR_R''@|$(HAVE_DECL_STRERROR_R)|g' \
 	      -e 's|@''HAVE_DECL_STRSIGNAL''@|$(HAVE_DECL_STRSIGNAL)|g' \
 	      -e 's|@''HAVE_STRVERSCMP''@|$(HAVE_STRVERSCMP)|g' \
 	      -e 's|@''REPLACE_STPNCPY''@|$(REPLACE_STPNCPY)|g' \
@@ -232,6 +238,7 @@ string.h: string.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	      -e 's|@''REPLACE_STRDUP''@|$(REPLACE_STRDUP)|g' \
 	      -e 's|@''REPLACE_STRSTR''@|$(REPLACE_STRSTR)|g' \
 	      -e 's|@''REPLACE_STRERROR''@|$(REPLACE_STRERROR)|g' \
+	      -e 's|@''REPLACE_STRERROR_R''@|$(REPLACE_STRERROR_R)|g' \
 	      -e 's|@''REPLACE_STRNCAT''@|$(REPLACE_STRNCAT)|g' \
 	      -e 's|@''REPLACE_STRNDUP''@|$(REPLACE_STRNDUP)|g' \
 	      -e 's|@''REPLACE_STRNLEN''@|$(REPLACE_STRNLEN)|g' \
@@ -289,6 +296,8 @@ wchar.h: wchar.in.h $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
 	{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
 	  sed -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
 	      -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+	      -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+	      -e 's|@''HAVE_FEATURES_H''@|$(HAVE_FEATURES_H)|g' \
 	      -e 's|@''NEXT_WCHAR_H''@|$(NEXT_WCHAR_H)|g' \
 	      -e 's|@''HAVE_WCHAR_H''@|$(HAVE_WCHAR_H)|g' \
 	      -e 's|@''GNULIB_BTOWC''@|$(GNULIB_BTOWC)|g' \
diff --git a/lib/gllib/stddef.in.h b/lib/gllib/stddef.in.h
index c8900d5..4f25aee 100644
--- a/lib/gllib/stddef.in.h
+++ b/lib/gllib/stddef.in.h
@@ -26,6 +26,7 @@
 #if __GNUC__ >= 3
 @PRAGMA_SYSTEM_HEADER@
 #endif
+@PRAGMA_COLUMNS@
 
 #if defined __need_wchar_t || defined __need_size_t  \
   || defined __need_ptrdiff_t || defined __need_NULL \
diff --git a/lib/gllib/stdint.in.h b/lib/gllib/stdint.in.h
index f23bcf7..6fafca4 100644
--- a/lib/gllib/stdint.in.h
+++ b/lib/gllib/stdint.in.h
@@ -26,6 +26,7 @@
 #if __GNUC__ >= 3
 @PRAGMA_SYSTEM_HEADER@
 #endif
+@PRAGMA_COLUMNS@
 
 /* When including a system file that in turn includes <inttypes.h>,
    use the system <inttypes.h>, not our substitute.  This avoids
@@ -133,40 +134,53 @@ typedef unsigned int gl_uint32_t;
 #define int32_t gl_int32_t
 #define uint32_t gl_uint32_t
 
+/* If the system defines INT64_MAX, assume int64_t works.  That way,
+   if the underlying platform defines int64_t to be a 64-bit long long
+   int, the code below won't mistakenly define it to be a 64-bit long
+   int, which would mess up C++ name mangling.  */
+
+#if INT64_MAX
+# define GL_INT64_T
+#else
 /* Do not undefine int64_t if gnulib is not being used with 64-bit
    types, since otherwise it breaks platforms like Tandem/NSK.  */
-#if LONG_MAX >> 31 >> 31 == 1
-# undef int64_t
+# if LONG_MAX >> 31 >> 31 == 1
+#  undef int64_t
 typedef long int gl_int64_t;
-# define int64_t gl_int64_t
-# define GL_INT64_T
-#elif defined _MSC_VER
-# undef int64_t
+#  define int64_t gl_int64_t
+#  define GL_INT64_T
+# elif defined _MSC_VER
+#  undef int64_t
 typedef __int64 gl_int64_t;
-# define int64_t gl_int64_t
-# define GL_INT64_T
-#elif @HAVE_LONG_LONG_INT@
-# undef int64_t
+#  define int64_t gl_int64_t
+#  define GL_INT64_T
+# elif @HAVE_LONG_LONG_INT@
+#  undef int64_t
 typedef long long int gl_int64_t;
-# define int64_t gl_int64_t
-# define GL_INT64_T
+#  define int64_t gl_int64_t
+#  define GL_INT64_T
+# endif
 #endif
 
-#if ULONG_MAX >> 31 >> 31 >> 1 == 1
-# undef uint64_t
-typedef unsigned long int gl_uint64_t;
-# define uint64_t gl_uint64_t
+#if UINT64_MAX
 # define GL_UINT64_T
-#elif defined _MSC_VER
-# undef uint64_t
+#else
+# if ULONG_MAX >> 31 >> 31 >> 1 == 1
+#  undef uint64_t
+typedef unsigned long int gl_uint64_t;
+#  define uint64_t gl_uint64_t
+#  define GL_UINT64_T
+# elif defined _MSC_VER
+#  undef uint64_t
 typedef unsigned __int64 gl_uint64_t;
-# define uint64_t gl_uint64_t
-# define GL_UINT64_T
-#elif @HAVE_UNSIGNED_LONG_LONG_INT@
-# undef uint64_t
+#  define uint64_t gl_uint64_t
+#  define GL_UINT64_T
+# elif @HAVE_UNSIGNED_LONG_LONG_INT@
+#  undef uint64_t
 typedef unsigned long long int gl_uint64_t;
-# define uint64_t gl_uint64_t
-# define GL_UINT64_T
+#  define uint64_t gl_uint64_t
+#  define GL_UINT64_T
+# endif
 #endif
 
 /* Avoid collision with Solaris 2.5.1 <pthread.h> etc.  */
@@ -278,7 +292,8 @@ typedef unsigned long int gl_uintmax_t;
 /* Verify that intmax_t and uintmax_t have the same size.  Too much code
    breaks if this is not the case.  If this check fails, the reason is likely
    to be found in the autoconf macros.  */
-typedef int _verify_intmax_size[2 * (sizeof (intmax_t) == sizeof (uintmax_t)) - 1];
+typedef int _verify_intmax_size[sizeof (intmax_t) == sizeof (uintmax_t)
+                                ? 1 : -1];
 
 /* 7.18.2. Limits of specified-width integer types */
 
@@ -310,17 +325,14 @@ typedef int _verify_intmax_size[2 * (sizeof (intmax_t) == sizeof (uintmax_t)) -
 #define INT32_MAX  2147483647
 #define UINT32_MAX  4294967295U
 
-#undef INT64_MIN
-#undef INT64_MAX
-#ifdef GL_INT64_T
+#if defined GL_INT64_T && ! defined INT64_MAX
 /* Prefer (- INTMAX_C (1) << 63) over (~ INT64_MAX) because SunPRO C 5.0
    evaluates the latter incorrectly in preprocessor expressions.  */
 # define INT64_MIN  (- INTMAX_C (1) << 63)
 # define INT64_MAX  INTMAX_C (9223372036854775807)
 #endif
 
-#undef UINT64_MAX
-#ifdef GL_UINT64_T
+#if defined GL_UINT64_T && ! defined UINT64_MAX
 # define UINT64_MAX  UINTMAX_C (18446744073709551615)
 #endif
 
diff --git a/lib/gllib/string.in.h b/lib/gllib/string.in.h
index f5b61e4..b5711c0 100644
--- a/lib/gllib/string.in.h
+++ b/lib/gllib/string.in.h
@@ -21,6 +21,7 @@
 #if __GNUC__ >= 3
 @PRAGMA_SYSTEM_HEADER@
 #endif
+@PRAGMA_COLUMNS@
 
 /* The include_next requires a split double-inclusion guard.  */
 #@INCLUDE_NEXT@ @NEXT_STRING_H@
@@ -50,8 +51,8 @@
 #endif
 
 /* NetBSD 5.0 declares strsignal in <unistd.h>, not in <string.h>.  */
-/* But avoid namespace pollution on glibc systems.  */
-#if (@GNULIB_STRSIGNAL@ || defined GNULIB_POSIXCHECK)  \
+/* But in any case avoid namespace pollution on glibc systems.  */
+#if (@GNULIB_STRSIGNAL@ || defined GNULIB_POSIXCHECK) && defined __NetBSD__ \
     && ! defined __GLIBC__
 # include <unistd.h>
 #endif
@@ -86,7 +87,7 @@ _GL_CXXALIAS_SYS_CAST2 (memchr,
                         void *, (void const *__s, int __c, size_t __n),
                         void const *, (void const *__s, int __c, size_t __n));
 # endif
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (memchr, void *, (void *__s, int __c, size_t __n));
 _GL_CXXALIASWARN1 (memchr, void const *,
@@ -171,7 +172,7 @@ _GL_FUNCDECL_SYS (memrchr, void *, (void const *, int, size_t)
 _GL_CXXALIAS_SYS_CAST2 (memrchr,
                         void *, (void const *, int, size_t),
                         void const *, (void const *, int, size_t));
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (memrchr, void *, (void *, int, size_t));
 _GL_CXXALIASWARN1 (memrchr, void const *, (void const *, int, size_t));
@@ -201,7 +202,7 @@ _GL_FUNCDECL_SYS (rawmemchr, void *, (void const *__s, int __c_in)
 _GL_CXXALIAS_SYS_CAST2 (rawmemchr,
                         void *, (void const *__s, int __c_in),
                         void const *, (void const *__s, int __c_in));
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (rawmemchr, void *, (void *__s, int __c_in));
 _GL_CXXALIASWARN1 (rawmemchr, void const *, (void const *__s, int __c_in));
@@ -292,7 +293,7 @@ _GL_FUNCDECL_SYS (strchrnul, char *, (char const *__s, int __c_in)
 _GL_CXXALIAS_SYS_CAST2 (strchrnul,
                         char *, (char const *__s, int __c_in),
                         char const *, (char const *__s, int __c_in));
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (strchrnul, char *, (char *__s, int __c_in));
 _GL_CXXALIASWARN1 (strchrnul, char const *, (char const *__s, int __c_in));
@@ -438,7 +439,7 @@ _GL_FUNCDECL_SYS (strpbrk, char *, (char const *__s, char const *__accept)
 _GL_CXXALIAS_SYS_CAST2 (strpbrk,
                         char *, (char const *__s, char const *__accept),
                         const char *, (char const *__s, char const *__accept));
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (strpbrk, char *, (char *__s, char const *__accept));
 _GL_CXXALIASWARN1 (strpbrk, char const *,
@@ -540,7 +541,7 @@ _GL_CXXALIAS_SYS_CAST2 (strstr,
                         char *, (const char *haystack, const char *needle),
                         const char *, (const char *haystack, const char *needle));
 # endif
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (strstr, char *, (char *haystack, const char *needle));
 _GL_CXXALIASWARN1 (strstr, const char *,
@@ -589,7 +590,7 @@ _GL_CXXALIAS_SYS_CAST2 (strcasestr,
                         char *, (const char *haystack, const char *needle),
                         const char *, (const char *haystack, const char *needle));
 # endif
-# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 10 \
+# if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 10) && !defined __UCLIBC__) \
      && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
 _GL_CXXALIASWARN1 (strcasestr, char *, (char *haystack, const char *needle));
 _GL_CXXALIASWARN1 (strcasestr, const char *,
@@ -901,6 +902,35 @@ _GL_WARN_ON_USE (strerror, "strerror is unportable - "
                  "use gnulib module strerror to guarantee non-NULL result");
 #endif
 
+/* Map any int, typically from errno, into an error message.  Multithread-safe.
+   Uses the POSIX declaration, not the glibc declaration.  */
+#if @GNULIB_STRERROR_R@
+# if @REPLACE_STRERROR_R@
+#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+#   undef strerror_r
+#   define strerror_r rpl_strerror_r
+#  endif
+_GL_FUNCDECL_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen)
+                                   _GL_ARG_NONNULL ((2)));
+_GL_CXXALIAS_RPL (strerror_r, int, (int errnum, char *buf, size_t buflen));
+# else
+#  if !@HAVE_DECL_STRERROR_R@
+_GL_FUNCDECL_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen)
+                                   _GL_ARG_NONNULL ((2)));
+#  endif
+_GL_CXXALIAS_SYS (strerror_r, int, (int errnum, char *buf, size_t buflen));
+# endif
+# if @HAVE_DECL_STRERROR_R@
+_GL_CXXALIASWARN (strerror_r);
+# endif
+#elif defined GNULIB_POSIXCHECK
+# undef strerror_r
+# if HAVE_RAW_DECL_STRERROR_R
+_GL_WARN_ON_USE (strerror_r, "strerror_r is unportable - "
+                 "use gnulib module strerror_r-posix for portability");
+# endif
+#endif
+
 #if @GNULIB_STRSIGNAL@
 # if @REPLACE_STRSIGNAL@
 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
diff --git a/lib/gllib/wchar.in.h b/lib/gllib/wchar.in.h
index ed582e5..edae751 100644
--- a/lib/gllib/wchar.in.h
+++ b/lib/gllib/wchar.in.h
@@ -29,6 +29,7 @@
 #if __GNUC__ >= 3
 @PRAGMA_SYSTEM_HEADER@
 #endif
+@PRAGMA_COLUMNS@
 
 #if defined __need_mbstate_t || defined __need_wint_t || (defined __hpux && ((defined _INTTYPES_INCLUDED && !defined strtoimax) || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H)) || defined _GL_ALREADY_INCLUDING_WCHAR_H
 /* Special invocation convention:
@@ -52,6 +53,10 @@
 
 #define _GL_ALREADY_INCLUDING_WCHAR_H
 
+#if @HAVE_FEATURES_H@
+# include <features.h> /* for __GLIBC__ */
+#endif
+
 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
    <wchar.h>.
    BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
diff --git a/lib/glm4/gnulib-common.m4 b/lib/glm4/gnulib-common.m4
index 4c7ac30..d0c8b66 100644
--- a/lib/glm4/gnulib-common.m4
+++ b/lib/glm4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 20
+# gnulib-common.m4 serial 21
 dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -102,6 +102,19 @@ AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
     [Define to 1 when the gnulib module $1 should be tested.])
 ])
 
+# Test whether <features.h> exists.
+# Set HAVE_FEATURES_H.
+AC_DEFUN([gl_FEATURES_H],
+[
+  AC_CHECK_HEADERS_ONCE([features.h])
+  if test $ac_cv_header_features_h = yes; then
+    HAVE_FEATURES_H=1
+  else
+    HAVE_FEATURES_H=0
+  fi
+  AC_SUBST([HAVE_FEATURES_H])
+])
+
 # m4_foreach_w
 # is a backport of autoconf-2.59c's m4_foreach_w.
 # Remove this macro when we can assume autoconf >= 2.60.
diff --git a/lib/glm4/include_next.m4 b/lib/glm4/include_next.m4
index 51a719b..e37eb05 100644
--- a/lib/glm4/include_next.m4
+++ b/lib/glm4/include_next.m4
@@ -1,4 +1,4 @@
-# include_next.m4 serial 15
+# include_next.m4 serial 16
 dnl Copyright (C) 2006-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -24,6 +24,13 @@ dnl does not warn about some things, and on some systems (Solaris and Interix)
 dnl __STDC__ evaluates to 0 instead of to 1. The latter is an undesired side
 dnl effect; we are therefore careful to use 'defined __STDC__' or '1' instead
 dnl of plain '__STDC__'.
+dnl
+dnl PRAGMA_COLUMNS can be used in files that override system header files, so
+dnl as to avoid compilation errors on HP NonStop systems when the gnulib file
+dnl is included by a system header file that does a "#pragma COLUMNS 80" (which
+dnl has the effect of truncating the lines of that file and all files that it
+dnl includes to 80 columns) and the gnulib file has lines longer than 80
+dnl columns.
 
 AC_DEFUN([gl_INCLUDE_NEXT],
 [
@@ -98,6 +105,24 @@ dnl We intentionally avoid using AC_LANG_SOURCE here.
   AC_SUBST([INCLUDE_NEXT])
   AC_SUBST([INCLUDE_NEXT_AS_FIRST_DIRECTIVE])
   AC_SUBST([PRAGMA_SYSTEM_HEADER])
+  AC_CACHE_CHECK([whether system header files limit the line length],
+    [gl_cv_pragma_columns],
+    [dnl HP NonStop systems, which define __TANDEM, have this misfeature.
+     AC_EGREP_CPP([choke me],
+       [
+#ifdef __TANDEM
+choke me
+#endif
+       ],
+       [gl_cv_pragma_columns=yes],
+       [gl_cv_pragma_columns=no])
+    ])
+  if test $gl_cv_pragma_columns = yes; then
+    PRAGMA_COLUMNS="#pragma COLUMNS 10000"
+  else
+    PRAGMA_COLUMNS=
+  fi
+  AC_SUBST([PRAGMA_COLUMNS])
 ])
 
 # gl_CHECK_NEXT_HEADERS(HEADER1 HEADER2 ...)
diff --git a/lib/glm4/string_h.m4 b/lib/glm4/string_h.m4
index 1977aec..5844b2d 100644
--- a/lib/glm4/string_h.m4
+++ b/lib/glm4/string_h.m4
@@ -5,7 +5,7 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-# serial 17
+# serial 18
 
 # Written by Paul Eggert.
 
@@ -28,8 +28,8 @@ AC_DEFUN([gl_HEADER_STRING_H_BODY],
   gl_WARN_ON_USE_PREPARE([[#include <string.h>
     ]],
     [memmem mempcpy memrchr rawmemchr stpcpy stpncpy strchrnul strdup
-     strncat strndup strnlen strpbrk strsep strcasestr strtok_r strsignal
-     strverscmp])
+     strncat strndup strnlen strpbrk strsep strcasestr strtok_r strerror_r
+     strsignal strverscmp])
 ])
 
 AC_DEFUN([gl_STRING_MODULE_INDICATOR],
@@ -75,6 +75,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
   GNULIB_MBSSEP=0;      AC_SUBST([GNULIB_MBSSEP])
   GNULIB_MBSTOK_R=0;    AC_SUBST([GNULIB_MBSTOK_R])
   GNULIB_STRERROR=0;    AC_SUBST([GNULIB_STRERROR])
+  GNULIB_STRERROR_R=0;  AC_SUBST([GNULIB_STRERROR_R])
   GNULIB_STRSIGNAL=0;   AC_SUBST([GNULIB_STRSIGNAL])
   GNULIB_STRVERSCMP=0;  AC_SUBST([GNULIB_STRVERSCMP])
   HAVE_MBSLEN=0;        AC_SUBST([HAVE_MBSLEN])
@@ -94,6 +95,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
   HAVE_STRSEP=1;                AC_SUBST([HAVE_STRSEP])
   HAVE_STRCASESTR=1;            AC_SUBST([HAVE_STRCASESTR])
   HAVE_DECL_STRTOK_R=1;         AC_SUBST([HAVE_DECL_STRTOK_R])
+  HAVE_DECL_STRERROR_R=1;       AC_SUBST([HAVE_DECL_STRERROR_R])
   HAVE_DECL_STRSIGNAL=1;        AC_SUBST([HAVE_DECL_STRSIGNAL])
   HAVE_STRVERSCMP=1;            AC_SUBST([HAVE_STRVERSCMP])
   REPLACE_MEMCHR=0;             AC_SUBST([REPLACE_MEMCHR])
@@ -103,6 +105,7 @@ AC_DEFUN([gl_HEADER_STRING_H_DEFAULTS],
   REPLACE_STRSTR=0;             AC_SUBST([REPLACE_STRSTR])
   REPLACE_STRCASESTR=0;         AC_SUBST([REPLACE_STRCASESTR])
   REPLACE_STRERROR=0;           AC_SUBST([REPLACE_STRERROR])
+  REPLACE_STRERROR_R=0;         AC_SUBST([REPLACE_STRERROR_R])
   REPLACE_STRNCAT=0;            AC_SUBST([REPLACE_STRNCAT])
   REPLACE_STRNDUP=0;            AC_SUBST([REPLACE_STRNDUP])
   REPLACE_STRNLEN=0;            AC_SUBST([REPLACE_STRNLEN])
diff --git a/lib/glm4/wchar_h.m4 b/lib/glm4/wchar_h.m4
index 8cae82d..8c8fad9 100644
--- a/lib/glm4/wchar_h.m4
+++ b/lib/glm4/wchar_h.m4
@@ -7,7 +7,7 @@ dnl with or without modifications, as long as this notice is preserved.
 
 dnl Written by Eric Blake.
 
-# wchar_h.m4 serial 33
+# wchar_h.m4 serial 35
 
 AC_DEFUN([gl_WCHAR_H],
 [
@@ -26,6 +26,8 @@ AC_DEFUN([gl_WCHAR_H],
   fi
   AC_SUBST([HAVE_WCHAR_H])
 
+  AC_REQUIRE([gl_FEATURES_H])
+
   AC_REQUIRE([gt_TYPE_WINT_T])
   if test $gt_cv_c_wint_t = yes; then
     HAVE_WINT_T=1
@@ -38,7 +40,7 @@ AC_DEFUN([gl_WCHAR_H],
   dnl corresponding gnulib module is not in use.
   gl_WARN_ON_USE_PREPARE([[
 /* Some systems require additional headers.  */
-#ifndef __GLIBC__
+#if !(defined __GLIBC__ && !defined __UCLIBC__)
 # include <stddef.h>
 # include <stdio.h>
 # include <time.h>