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, 138 insertions, 0 deletions

diff --git a/gnulib/aclocal-m4-deps.mk b/gnulib/aclocal-m4-deps.mk
new file mode 100644
index 0000000..ffa003d
--- /dev/null
+++ b/gnulib/aclocal-m4-deps.mk
@@ -0,0 +1,138 @@
+# THIS FILE IS GENERATED.  -*- buffer-read-only: t -*- vi :set ro:
+aclocal_m4_deps = \
+	import/m4/00gnulib.m4 \
+	import/m4/absolute-header.m4 \
+	import/m4/alloca.m4 \
+	import/m4/arpa_inet_h.m4 \
+	import/m4/canonicalize.m4 \
+	import/m4/chdir-long.m4 \
+	import/m4/close.m4 \
+	import/m4/closedir.m4 \
+	import/m4/codeset.m4 \
+	import/m4/configmake.m4 \
+	import/m4/d-ino.m4 \
+	import/m4/d-type.m4 \
+	import/m4/dirent_h.m4 \
+	import/m4/dirfd.m4 \
+	import/m4/dirname.m4 \
+	import/m4/double-slash-root.m4 \
+	import/m4/dup.m4 \
+	import/m4/dup2.m4 \
+	import/m4/eealloc.m4 \
+	import/m4/environ.m4 \
+	import/m4/errno_h.m4 \
+	import/m4/error.m4 \
+	import/m4/exponentd.m4 \
+	import/m4/exponentl.m4 \
+	import/m4/extensions.m4 \
+	import/m4/extern-inline.m4 \
+	import/m4/fchdir.m4 \
+	import/m4/fcntl-o.m4 \
+	import/m4/fcntl.m4 \
+	import/m4/fcntl_h.m4 \
+	import/m4/fdopendir.m4 \
+	import/m4/filenamecat.m4 \
+	import/m4/flexmember.m4 \
+	import/m4/float_h.m4 \
+	import/m4/fnmatch.m4 \
+	import/m4/fpieee.m4 \
+	import/m4/frexp.m4 \
+	import/m4/frexpl.m4 \
+	import/m4/fstat.m4 \
+	import/m4/fstatat.m4 \
+	import/m4/getcwd-abort-bug.m4 \
+	import/m4/getcwd-path-max.m4 \
+	import/m4/getcwd.m4 \
+	import/m4/getdtablesize.m4 \
+	import/m4/getlogin_r.m4 \
+	import/m4/getprogname.m4 \
+	import/m4/gettimeofday.m4 \
+	import/m4/glibc21.m4 \
+	import/m4/glob.m4 \
+	import/m4/gnulib-cache.m4 \
+	import/m4/gnulib-common.m4 \
+	import/m4/gnulib-comp.m4 \
+	import/m4/gnulib-tool.m4 \
+	import/m4/hard-locale.m4 \
+	import/m4/include_next.m4 \
+	import/m4/inet_ntop.m4 \
+	import/m4/inttypes-pri.m4 \
+	import/m4/inttypes.m4 \
+	import/m4/isnand.m4 \
+	import/m4/isnanl.m4 \
+	import/m4/largefile.m4 \
+	import/m4/limits-h.m4 \
+	import/m4/localcharset.m4 \
+	import/m4/locale-fr.m4 \
+	import/m4/locale-ja.m4 \
+	import/m4/locale-zh.m4 \
+	import/m4/longlong.m4 \
+	import/m4/lstat.m4 \
+	import/m4/malloc.m4 \
+	import/m4/malloca.m4 \
+	import/m4/math_h.m4 \
+	import/m4/mbrtowc.m4 \
+	import/m4/mbsinit.m4 \
+	import/m4/mbsrtowcs.m4 \
+	import/m4/mbstate_t.m4 \
+	import/m4/memchr.m4 \
+	import/m4/memmem.m4 \
+	import/m4/mempcpy.m4 \
+	import/m4/memrchr.m4 \
+	import/m4/mkdir.m4 \
+	import/m4/mkdtemp.m4 \
+	import/m4/mkostemp.m4 \
+	import/m4/mmap-anon.m4 \
+	import/m4/mode_t.m4 \
+	import/m4/msvc-inval.m4 \
+	import/m4/msvc-nothrow.m4 \
+	import/m4/multiarch.m4 \
+	import/m4/netinet_in_h.m4 \
+	import/m4/nocrash.m4 \
+	import/m4/off_t.m4 \
+	import/m4/onceonly.m4 \
+	import/m4/open.m4 \
+	import/m4/openat.m4 \
+	import/m4/opendir.m4 \
+	import/m4/pathmax.m4 \
+	import/m4/rawmemchr.m4 \
+	import/m4/readdir.m4 \
+	import/m4/readlink.m4 \
+	import/m4/realloc.m4 \
+	import/m4/rename.m4 \
+	import/m4/rewinddir.m4 \
+	import/m4/rmdir.m4 \
+	import/m4/save-cwd.m4 \
+	import/m4/secure_getenv.m4 \
+	import/m4/setenv.m4 \
+	import/m4/signal_h.m4 \
+	import/m4/socklen.m4 \
+	import/m4/sockpfaf.m4 \
+	import/m4/ssize_t.m4 \
+	import/m4/stat.m4 \
+	import/m4/stdalign.m4 \
+	import/m4/stdbool.m4 \
+	import/m4/stddef_h.m4 \
+	import/m4/stdint.m4 \
+	import/m4/stdio_h.m4 \
+	import/m4/stdlib_h.m4 \
+	import/m4/strchrnul.m4 \
+	import/m4/strdup.m4 \
+	import/m4/strerror.m4 \
+	import/m4/string_h.m4 \
+	import/m4/strstr.m4 \
+	import/m4/strtok_r.m4 \
+	import/m4/sys_socket_h.m4 \
+	import/m4/sys_stat_h.m4 \
+	import/m4/sys_time_h.m4 \
+	import/m4/sys_types_h.m4 \
+	import/m4/sys_uio_h.m4 \
+	import/m4/tempname.m4 \
+	import/m4/time_h.m4 \
+	import/m4/unistd-safer.m4 \
+	import/m4/unistd_h.m4 \
+	import/m4/warn-on-use.m4 \
+	import/m4/wchar_h.m4 \
+	import/m4/wchar_t.m4 \
+	import/m4/wctype_h.m4 \
+	import/m4/wint_t.m4