+# define USE_SYSTEM_STRERROR_R 1
+
+#else /* (__GLIBC__ >= 2 || defined __UCLIBC__ || defined __CYGWIN__ ? !HAVE___XPG_STRERROR_R : !HAVE_DECL_STRERROR_R) */
+
+/* Use the system's strerror(). Exclude glibc and cygwin because the
+ system strerror_r has the wrong return type, and cygwin 1.7.9
+ strerror_r clobbers strerror. */
+# undef strerror
+
+# define USE_SYSTEM_STRERROR 1
+
+# if defined __NetBSD__ || defined __hpux || ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) || defined __sgi || (defined __sun && !defined _LP64) || defined __CYGWIN__
+
+/* No locking needed. */
+
+/* Get catgets internationalization functions. */
+# if HAVE_CATGETS
+# include <nl_types.h>
+# endif
+
+/* Get sys_nerr, sys_errlist on HP-UX (otherwise only declared in C++ mode).
+ Get sys_nerr, sys_errlist on IRIX (otherwise only declared with _SGIAPI). */
+# if defined __hpux || defined __sgi
+extern int sys_nerr;
+extern char *sys_errlist[];
+# endif
+
+/* Get sys_nerr on Solaris. */
+# if defined __sun && !defined _LP64
+extern int sys_nerr;
+# endif
+
+# else
+
+# include "glthread/lock.h"
+
+/* This lock protects the buffer returned by strerror(). We assume that
+ no other uses of strerror() exist in the program. */
+gl_lock_define_initialized(static, strerror_lock)
+
+# endif
+
+#endif
+
+/* On MSVC, there is no snprintf() function, just a _snprintf().
+ It is of lower quality, but sufficient for the simple use here.
+ We only have to make sure to NUL terminate the result (_snprintf
+ does not NUL terminate, like strncpy). */
+#if !HAVE_SNPRINTF
+static int
+local_snprintf (char *buf, size_t buflen, const char *format, ...)