diff --git a/gnu/usr.bin/bison/config.h b/gnu/usr.bin/bison/config.h
new file mode 100644
index 000000000000..7567a68757d5
--- /dev/null
+++ b/gnu/usr.bin/bison/config.h
@@ -0,0 +1,180 @@
+/* config.h.  Generated automatically by configure.  */
+/* config.hin.  Generated automatically from configure.in by autoheader.  */
+#ifndef CONFIG_H
+#define CONFIG_H
+
+/* Define if using alloca.c.  */
+/* #undef C_ALLOCA */
+
+/* Define to empty if the keyword does not work.  */
+/* #undef const */
+
+/* Define to one of _getb67, GETB67, getb67 for Cray-2 and Cray-YMP systems.
+   This function is required for alloca.c support on those systems.  */
+/* #undef CRAY_STACKSEG_END */
+
+/* Define if you have alloca, as a function or macro.  */
+#define HAVE_ALLOCA 1
+
+/* Define if you have <alloca.h> and it should be used (not on Ultrix).  */
+/* #undef HAVE_ALLOCA_H */
+
+/* Define if you have a working `mmap' system call.  */
+#define HAVE_MMAP 1
+
+/* Define as __inline if that's what the C compiler calls it.  */
+/* #undef inline */
+
+/* Define if on MINIX.  */
+/* #undef _MINIX */
+
+/* Define to `long' if <sys/types.h> doesn't define.  */
+/* #undef off_t */
+
+/* Define if the system does not provide POSIX.1 features except
+   with this defined.  */
+/* #undef _POSIX_1_SOURCE */
+
+/* Define if you need to in order for stat and other things to work.  */
+/* #undef _POSIX_SOURCE */
+
+/* Define to `unsigned' if <sys/types.h> doesn't define.  */
+/* #undef size_t */
+
+/* If using the C implementation of alloca, define if you know the
+   direction of stack growth for your system; otherwise it will be
+   automatically deduced at run-time.
+ STACK_DIRECTION > 0 => grows toward higher addresses
+ STACK_DIRECTION < 0 => grows toward lower addresses
+ STACK_DIRECTION = 0 => direction of growth unknown
+ */
+/* #undef STACK_DIRECTION */
+
+/* Define if you have the ANSI C header files.  */
+#define STDC_HEADERS 1
+
+/* Version string.  */
+#define VERSION_STRING "GNU Bison version 1.28"
+
+/* Define to 1 if NLS is requested.  */
+/* #define ENABLE_NLS 1 */
+
+/* Define as 1 if you have catgets and don't want to use GNU gettext.  */
+/* #undef HAVE_CATGETS */
+
+/* Define as 1 if you have gettext and don't want to use GNU gettext.  */
+/* #undef HAVE_GETTEXT */
+
+/* Define if your locale.h file contains LC_MESSAGES.  */
+#define HAVE_LC_MESSAGES 1
+
+/* Define to 1 if you have the stpcpy function.  */
+/* #undef HAVE_STPCPY */
+
+/* The location of the simple parser (bison.simple).  */
+/* #define XPFILE "/usr/share/misc/bison.simple" */
+
+/* The location of the semantic parser (bison.hairy).  */
+/* #define XPFILE1 "/usr/share/misc/bison.hairy" */
+
+/* The location of the local directory.  */
+/* #define LOCALEDIR "/usr/share/locale" */
+
+/* Define if you have the __argz_count function.  */
+/* #undef HAVE___ARGZ_COUNT */
+
+/* Define if you have the __argz_next function.  */
+/* #undef HAVE___ARGZ_NEXT */
+
+/* Define if you have the __argz_stringify function.  */
+/* #undef HAVE___ARGZ_STRINGIFY */
+
+/* Define if you have the dcgettext function.  */
+/* #undef HAVE_DCGETTEXT */
+
+/* Define if you have the getcwd function.  */
+#define HAVE_GETCWD 1
+
+/* Define if you have the getpagesize function.  */
+#define HAVE_GETPAGESIZE 1
+
+/* Define if you have the mkstemp function.  */
+#define HAVE_MKSTEMP 1
+
+/* Define if you have the munmap function.  */
+#define HAVE_MUNMAP 1
+
+/* Define if you have the putenv function.  */
+#define HAVE_PUTENV 1
+
+/* Define if you have the setenv function.  */
+#define HAVE_SETENV 1
+
+/* Define if you have the setlocale function.  */
+#define HAVE_SETLOCALE 1
+
+/* Define if you have the stpcpy function.  */
+/* #undef HAVE_STPCPY */
+
+/* Define if you have the strcasecmp function.  */
+#define HAVE_STRCASECMP 1
+
+/* Define if you have the strchr function.  */
+#define HAVE_STRCHR 1
+
+/* Define if you have the strdup function.  */
+#define HAVE_STRDUP 1
+
+/* Define if you have the <argz.h> header file.  */
+/* #undef HAVE_ARGZ_H */
+
+/* Define if you have the <ctype.h> header file.  */
+#define HAVE_CTYPE_H 1
+
+/* Define if you have the <limits.h> header file.  */
+#define HAVE_LIMITS_H 1
+
+/* Define if you have the <locale.h> header file.  */
+#define HAVE_LOCALE_H 1
+
+/* Define if you have the <malloc.h> header file.  */
+/* #undef HAVE_MALLOC_H */
+
+/* Define if you have the <memory.h> header file.  */
+#define HAVE_MEMORY_H 1
+
+/* Define if you have the <nl_types.h> header file.  */
+#define HAVE_NL_TYPES_H 1
+
+/* Define if you have the <stdlib.h> header file.  */
+#define HAVE_STDLIB_H 1
+
+/* Define if you have the <string.h> header file.  */
+#define HAVE_STRING_H 1
+
+/* Define if you have the <sys/param.h> header file.  */
+#define HAVE_SYS_PARAM_H 1
+
+/* Define if you have the <unistd.h> header file.  */
+#define HAVE_UNISTD_H 1
+
+/* Define if you have the i library (-li).  */
+/* #undef HAVE_LIBI */
+
+/* Name of package */
+#define PACKAGE "bison"
+
+/* Version number of package */
+#define VERSION "1.28"
+
+/* Define if compiler has function prototypes */
+#define PROTOTYPES 1
+
+
+#if defined(PROTOTYPES) || defined(__cplusplus)
+# define PARAMS(p) p
+#else
+# define PARAMS(p) ()
+#endif
+
+#endif  /* CONFIG_H */