Move gdbsupport to the top level

This patch moves the gdbsupport directory to the top level.  This is
the next step in the ongoing project to move gdbserver to the top
level.

The bulk of this patch was created by "git mv gdb/gdbsupport gdbsupport".

This patch then adds a build system to gdbsupport and wires it into
the top level.  Then it changes gdb to use the top-level build.

gdbserver, on the other hand, is not yet changed.  It still does its
own build of gdbsupport.

ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* src-release.sh (GDB_SUPPORT_DIRS): Add gdbsupport.
	* MAINTAINERS: Add gdbsupport.
	* configure: Rebuild.
	* configure.ac (configdirs): Add gdbsupport.
	* gdbsupport: New directory, move from gdb/gdbsupport.
	* Makefile.def (host_modules, dependencies): Add gnulib.
	* Makefile.in: Rebuild.

gdb/ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* nat/x86-linux-dregs.c: Include configh.h.
	* nat/linux-ptrace.c: Include configh.h.
	* nat/linux-btrace.c: Include configh.h.
	* defs.h: Include config.h, bfd.h.
	* configure.ac: Don't source common.host.
	(CONFIG_OBS, CONFIG_SRCS): Remove gdbsupport files.
	* configure: Rebuild.
	* acinclude.m4: Update path.
	* Makefile.in (SUPPORT, LIBSUPPORT, INCSUPPORT): New variables.
	(CONFIG_SRC_SUBDIR): Remove gdbsupport.
	(INTERNAL_CFLAGS_BASE): Add INCSUPPORT.
	(CLIBS): Add LIBSUPPORT.
	(CDEPS): Likewise.
	(COMMON_SFILES): Remove gdbsupport files.
	(HFILES_NO_SRCDIR): Likewise.
	(stamp-version): Update path to create-version.sh.
	(ALLDEPFILES): Remove gdbsupport files.

gdb/gdbserver/ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* server.h: Include config.h.
	* gdbreplay.c: Include config.h.
	* configure: Rebuild.
	* configure.ac: Don't source common.host.
	* acinclude.m4: Update path.
	* Makefile.in (INCSUPPORT): New variable.
	(INCLUDE_CFLAGS): Add INCSUPPORT.
	(SFILES): Update paths.
	(version-generated.c): Update path to create-version.sh.
	(gdbsupport/%-ipa.o, gdbsupport/%.o): Update paths.

gdbsupport/ChangeLog
2020-01-14  Tom Tromey  <tom@tromey.com>

	* common-defs.h: Add GDBSERVER case.  Update includes.
	* acinclude.m4, aclocal.m4, config.in, configure, configure.ac,
	Makefile.am, Makefile.in, README: New files.
	* Moved from ../gdb/gdbsupport/

Change-Id: I07632e7798635c1bab389bf885971e584fb4bb78

1 files changed, 68 insertions, 0 deletions

diff --git a/gdbsupport/buffer.h b/gdbsupport/buffer.h
new file mode 100644
index 0000000..6e4c167
--- /dev/null
+++ b/gdbsupport/buffer.h
@@ -0,0 +1,68 @@
+/* A simple growing buffer for GDB.
+  
+   Copyright (C) 2009-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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 COMMON_BUFFER_H
+#define COMMON_BUFFER_H
+
+struct buffer
+{
+  char *buffer;
+  size_t buffer_size; /* allocated size */
+  size_t used_size; /* actually used size */
+};
+
+/* Append DATA of size SIZE to the end of BUFFER.  Grows the buffer to
+   accommodate the new data.  */
+void buffer_grow (struct buffer *buffer, const char *data, size_t size);
+
+/* Append C to the end of BUFFER.  Grows the buffer to accommodate the
+   new data.  */
+
+static inline void
+buffer_grow_char (struct buffer *buffer, char c)
+{
+  buffer_grow (buffer, &c, 1);
+}
+
+/* Release any memory held by BUFFER.  */
+void buffer_free (struct buffer *buffer);
+
+/* Initialize BUFFER.  BUFFER holds no memory afterwards.  */
+void buffer_init (struct buffer *buffer);
+
+/* Return a pointer into BUFFER data, effectively transferring
+   ownership of the buffer memory to the caller.  Calling buffer_free
+   afterwards has no effect on the returned data.  */
+char* buffer_finish (struct buffer *buffer);
+
+/* Simple printf to buffer function.  Current implemented formatters:
+   %s - grow an xml escaped text in BUFFER.
+   %d - grow an signed integer in BUFFER.
+   %u - grow an unsigned integer in BUFFER.
+   %x - grow an unsigned integer formatted in hexadecimal in BUFFER.
+   %o - grow an unsigned integer formatted in octal in BUFFER.  */
+void buffer_xml_printf (struct buffer *buffer, const char *format, ...)
+  ATTRIBUTE_PRINTF (2, 3);
+
+#define buffer_grow_str(BUFFER,STRING)		\
+  buffer_grow (BUFFER, STRING, strlen (STRING))
+#define buffer_grow_str0(BUFFER,STRING)			\
+  buffer_grow (BUFFER, STRING, strlen (STRING) + 1)
+
+#endif /* COMMON_BUFFER_H */