Move gnulib to top level

This patch moves the gdb/gnulib subdirectory to the top level.

It adjusts the top-level build system to build gnulib when necessary,
and changes gdb to use this.  However, gdbserver still builds its own
copy of gnulib, just from the new source location.

A small hack was needed to ensure that gnulib is only built when gdb
is enabled.  The Makefile only provides an ordering -- the directory
must be mentioned in configdirs to actually be compiled at all.

Most of the patch is just a "git mv" of gnulib, though a few minor
path adjustments were needed in some files there.

Tested by the buildbot.

ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* MAINTAINERS: Add gnulib.
	* gnulib: New directory, move from gdb/gnulib.
	* configure.ac (host_libs): Add gnulib.
	* configure: Rebuild.
	* Makefile.def (host_modules, dependencies): Add gnulib.
	* Makefile.in: Rebuild.

gdb/ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* gnulib: Move directory to top-level.
	* configure.ac: Don't configure gnulib.
	* configure: Rebuild.
	* common/common-defs.h: Use new path to gnulib.
	* Makefile.in (GNULIB_BUILDDIR): Now ../gnulib.
	(GNULIB_H): Remove.
	(INCGNU): Look in new gnulib location.
	(HFILES_NO_SRCDIR): Remove gnulib files.
	(SUBDIR, REQUIRED_SUBDIRS): Remove gnulib.
	(generated_files): Remove GNULIB_H.
	($(LIBGNU), all-lib): Remove targets.
	(distclean): Don't mention GNULIB_BUILDDIR.
	($(GNULIB_BUILDDIR)/Makefile): Remove target.

gdb/gdbserver/ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* configure.ac: Use new path to gnulib.
	* configure: Rebuild.
	* Makefile.in (INCGNU, $(GNULIB_BUILDDIR)/Makefile): Use new path
	to gnulib.

gnulib/ChangeLog
2019-06-14  Tom Tromey  <tom@tromey.com>

	* update-gnulib.sh: Adjust paths.
	* Makefile.in: Adjust paths.
	* configure.ac: Adjust paths.  Use ACX_LARGEFILE.
	* configure: Rebuild.

1 files changed, 212 insertions, 0 deletions

diff --git a/gnulib/import/glob-libc.h b/gnulib/import/glob-libc.h
new file mode 100644
index 0000000..6256077
--- /dev/null
+++ b/gnulib/import/glob-libc.h
@@ -0,0 +1,212 @@
+/* Copyright (C) 1991-1992, 1995-1998, 2000-2001, 2004-2007, 2009-2016 Free
+   Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 of the License, 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 <http://www.gnu.org/licenses/>.  */
+
+#ifndef _GLOB_H
+#define _GLOB_H 1
+
+#ifndef __GLOB_GNULIB
+# include <sys/cdefs.h>
+#endif
+
+/* GCC 2.95 and later have "__restrict"; C99 compilers have
+   "restrict", and "configure" may have defined "restrict".
+   Other compilers use __restrict, __restrict__, and _Restrict, and
+   'configure' might #define 'restrict' to those words, so pick a
+   different name.  */
+#ifndef _Restrict_
+# if 199901L <= __STDC_VERSION__
+#  define _Restrict_ restrict
+# elif 2 < __GNUC__ || (2 == __GNUC__ && 95 <= __GNUC_MINOR__)
+#  define _Restrict_ __restrict
+# else
+#  define _Restrict_
+# endif
+#endif
+
+__BEGIN_DECLS
+
+/* We need 'size_t' for the following definitions.  */
+#ifndef __size_t
+# if defined __GNUC__ && __GNUC__ >= 2
+typedef __SIZE_TYPE__ __size_t;
+#  ifdef __USE_XOPEN
+typedef __SIZE_TYPE__ size_t;
+#  endif
+# else
+#  include <stddef.h>
+#  ifndef __size_t
+#   define __size_t size_t
+#  endif
+# endif
+#else
+/* The GNU CC stddef.h version defines __size_t as empty.  We need a real
+   definition.  */
+# undef __size_t
+# define __size_t size_t
+#endif
+
+/* Bits set in the FLAGS argument to 'glob'.  */
+#define GLOB_ERR        (1 << 0)/* Return on read errors.  */
+#define GLOB_MARK       (1 << 1)/* Append a slash to each name.  */
+#define GLOB_NOSORT     (1 << 2)/* Don't sort the names.  */
+#define GLOB_DOOFFS     (1 << 3)/* Insert PGLOB->gl_offs NULLs.  */
+#define GLOB_NOCHECK    (1 << 4)/* If nothing matches, return the pattern.  */
+#define GLOB_APPEND     (1 << 5)/* Append to results of a previous call.  */
+#define GLOB_NOESCAPE   (1 << 6)/* Backslashes don't quote metacharacters.  */
+#define GLOB_PERIOD     (1 << 7)/* Leading '.' can be matched by metachars.  */
+
+#if !defined __USE_POSIX2 || defined __USE_BSD || defined __USE_GNU
+# define GLOB_MAGCHAR    (1 << 8)/* Set in gl_flags if any metachars seen.  */
+# define GLOB_ALTDIRFUNC (1 << 9)/* Use gl_opendir et al functions.  */
+# define GLOB_BRACE      (1 << 10)/* Expand "{a,b}" to "a" "b".  */
+# define GLOB_NOMAGIC    (1 << 11)/* If no magic chars, return the pattern.  */
+# define GLOB_TILDE      (1 << 12)/* Expand ~user and ~ to home directories. */
+# define GLOB_ONLYDIR    (1 << 13)/* Match only directories.  */
+# define GLOB_TILDE_CHECK (1 << 14)/* Like GLOB_TILDE but return an error
+                                      if the user name is not available.  */
+# define __GLOB_FLAGS   (GLOB_ERR|GLOB_MARK|GLOB_NOSORT|GLOB_DOOFFS| \
+                         GLOB_NOESCAPE|GLOB_NOCHECK|GLOB_APPEND|     \
+                         GLOB_PERIOD|GLOB_ALTDIRFUNC|GLOB_BRACE|     \
+                         GLOB_NOMAGIC|GLOB_TILDE|GLOB_ONLYDIR|GLOB_TILDE_CHECK)
+#else
+# define __GLOB_FLAGS   (GLOB_ERR|GLOB_MARK|GLOB_NOSORT|GLOB_DOOFFS| \
+                         GLOB_NOESCAPE|GLOB_NOCHECK|GLOB_APPEND|     \
+                         GLOB_PERIOD)
+#endif
+
+/* Error returns from 'glob'.  */
+#define GLOB_NOSPACE    1       /* Ran out of memory.  */
+#define GLOB_ABORTED    2       /* Read error.  */
+#define GLOB_NOMATCH    3       /* No matches found.  */
+#define GLOB_NOSYS      4       /* Not implemented.  */
+#ifdef __USE_GNU
+/* Previous versions of this file defined GLOB_ABEND instead of
+   GLOB_ABORTED.  Provide a compatibility definition here.  */
+# define GLOB_ABEND GLOB_ABORTED
+#endif
+
+/* Structure describing a globbing run.  */
+#ifdef __USE_GNU
+struct stat;
+#endif
+typedef struct
+  {
+    __size_t gl_pathc;          /* Count of paths matched by the pattern.  */
+    char **gl_pathv;            /* List of matched pathnames.  */
+    __size_t gl_offs;           /* Slots to reserve in 'gl_pathv'.  */
+    int gl_flags;               /* Set to FLAGS, maybe | GLOB_MAGCHAR.  */
+
+    /* If the GLOB_ALTDIRFUNC flag is set, the following functions
+       are used instead of the normal file access functions.  */
+    void (*gl_closedir) (void *);
+#ifdef __USE_GNU
+    struct dirent *(*gl_readdir) (void *);
+#else
+    void *(*gl_readdir) (void *);
+#endif
+    void *(*gl_opendir) (const char *);
+#ifdef __USE_GNU
+    int (*gl_lstat) (const char *_Restrict_, struct stat *_Restrict_);
+    int (*gl_stat) (const char *_Restrict_, struct stat *_Restrict_);
+#else
+    int (*gl_lstat) (const char *_Restrict_, void *_Restrict_);
+    int (*gl_stat) (const char *_Restrict_, void *_Restrict_);
+#endif
+  } glob_t;
+
+#if defined __USE_LARGEFILE64 && !defined __GLOB_GNULIB
+# ifdef __USE_GNU
+struct stat64;
+# endif
+typedef struct
+  {
+    __size_t gl_pathc;
+    char **gl_pathv;
+    __size_t gl_offs;
+    int gl_flags;
+
+    /* If the GLOB_ALTDIRFUNC flag is set, the following functions
+       are used instead of the normal file access functions.  */
+    void (*gl_closedir) (void *);
+# ifdef __USE_GNU
+    struct dirent64 *(*gl_readdir) (void *);
+# else
+    void *(*gl_readdir) (void *);
+# endif
+    void *(*gl_opendir) (const char *);
+# ifdef __USE_GNU
+    int (*gl_lstat) (const char *_Restrict_, struct stat64 *_Restrict_);
+    int (*gl_stat) (const char *_Restrict_, struct stat64 *_Restrict_);
+# else
+    int (*gl_lstat) (const char *_Restrict_, void *_Restrict_);
+    int (*gl_stat) (const char *_Restrict_, void *_Restrict_);
+# endif
+  } glob64_t;
+#endif
+
+#if __USE_FILE_OFFSET64 && __GNUC__ < 2 && !defined __GLOB_GNULIB
+# define glob glob64
+# define globfree globfree64
+#endif
+
+/* Do glob searching for PATTERN, placing results in PGLOB.
+   The bits defined above may be set in FLAGS.
+   If a directory cannot be opened or read and ERRFUNC is not nil,
+   it is called with the pathname that caused the error, and the
+   'errno' value from the failing call; if it returns non-zero
+   'glob' returns GLOB_ABEND; if it returns zero, the error is ignored.
+   If memory cannot be allocated for PGLOB, GLOB_NOSPACE is returned.
+   Otherwise, 'glob' returns zero.  */
+#if !defined __USE_FILE_OFFSET64 || __GNUC__ < 2 || defined __GLOB_GNULIB
+extern int glob (const char *_Restrict_ __pattern, int __flags,
+                 int (*__errfunc) (const char *, int),
+                 glob_t *_Restrict_ __pglob) __THROW _GL_ARG_NONNULL ((1, 4));
+
+/* Free storage allocated in PGLOB by a previous 'glob' call.  */
+extern void globfree (glob_t *__pglob) __THROW _GL_ARG_NONNULL ((1));
+#else
+extern int __REDIRECT_NTH (glob, (const char *_Restrict_ __pattern,
+                                  int __flags,
+                                  int (*__errfunc) (const char *, int),
+                                  glob_t *_Restrict_ __pglob), glob64);
+
+extern void __REDIRECT_NTH (globfree, (glob_t *__pglob), globfree64);
+#endif
+
+#if defined __USE_LARGEFILE64 && !defined __GLOB_GNULIB
+extern int glob64 (const char *_Restrict_ __pattern, int __flags,
+                   int (*__errfunc) (const char *, int),
+                   glob64_t *_Restrict_ __pglob)
+     __THROW _GL_ARG_NONNULL ((1, 4));
+
+extern void globfree64 (glob64_t *__pglob) __THROW _GL_ARG_NONNULL ((1));
+#endif
+
+
+#ifdef __USE_GNU
+/* Return nonzero if PATTERN contains any metacharacters.
+   Metacharacters can be quoted with backslashes if QUOTE is nonzero.
+
+   This function is not part of the interface specified by POSIX.2
+   but several programs want to use it.  */
+extern int glob_pattern_p (const char *__pattern, int __quote)
+     __THROW _GL_ARG_NONNULL ((1));
+#endif
+
+__END_DECLS
+
+#endif /* glob.h  */