Ability to build the GNAT runtime with project files

This change add project files to provide the ability to rebuild the
runtime with gprbuild after setup-rts is called.

gcc/ada/

	* Makefile.rtl (ADA_INCLUDE_SRCS): Replace Makefile.adalib by
	libada.gpr and associated project files.
	(g-debpoo.o): Add missing rule to ensure subprograms are not reordered.
	(setup-rts): Add generation of libgnat/libgnarl.lst.
	(LIBGNAT_SRCS): Remove thread.c which is part of libgnarl.
	* tracebak.c, tb-gcc.c: Merged the two files to simplify dependencies.
	* libgnarl/libgnarl.gpr, libgnat/libada.gpr,
	libgnat/libgnat.gpr, libgnat/libgnat_common.gpr: New files.
	* doc/gnat_ugn/the_gnat_compilation_model.rst: Makefile.adalib
	replaced by libada.gpr.
	* libgnat/system-mingw.ads: Remove obsolete comment.
	* gcc-interface/Makefile.in: Remove dependency on tb-gcc.c.

1 files changed, 0 insertions, 125 deletions

diff --git a/gcc/ada/tb-gcc.c b/gcc/ada/tb-gcc.c
deleted file mode 100644
index 74d0c21..0000000
--- a/gcc/ada/tb-gcc.c
+++ /dev/null
@@ -1,125 +0,0 @@
-/****************************************************************************
- *                                                                          *
- *                         GNAT RUN-TIME COMPONENTS                         *
- *                                                                          *
- *                   T R A C E B A C K - G C C t a b l e s                  *
- *                                                                          *
- *                          C Implementation File                           *
- *                                                                          *
- *          Copyright (C) 2004-2019, Free Software Foundation, Inc.         *
- *                                                                          *
- * GNAT is free software;  you can  redistribute it  and/or modify it under *
- * terms of the  GNU General Public License as published  by the Free Soft- *
- * ware  Foundation;  either version 3,  or (at your option) any later ver- *
- * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
- * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
- * or FITNESS FOR A PARTICULAR PURPOSE.                                     *
- *                                                                          *
- * As a special exception under Section 7 of GPL version 3, you are granted *
- * additional permissions described in the GCC Runtime Library Exception,   *
- * version 3.1, as published by the Free Software Foundation.               *
- *                                                                          *
- * You should have received a copy of the GNU General Public License and    *
- * a copy of the GCC Runtime Library Exception along with this program;     *
- * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    *
- * <http://www.gnu.org/licenses/>.                                          *
- *                                                                          *
- * GNAT was originally developed  by the GNAT team at  New York University. *
- * Extensive contributions were provided by Ada Core Technologies Inc.      *
- *                                                                          *
- ****************************************************************************/
-
-/* This is an implementation of the __gnat_backtrace routine using the
-   underlying GCC unwinding support associated with the exception handling
-   infrastructure.  This will only work for ZCX based applications.  */
-
-#include <unwind.h>
-
-/* The implementation boils down to a call to _Unwind_Backtrace with a
-   tailored callback and carried-on data structure to keep track of the
-   input parameters we got as well as of the basic processing state.  */
-
-/******************
- * trace_callback *
- ******************/
-
-#if !defined (__USING_SJLJ_EXCEPTIONS__)
-
-typedef struct {
-  void ** traceback;
-  int max_len;
-  void * exclude_min;
-  void * exclude_max;
-  int  n_frames_to_skip;
-  int  n_frames_skipped;
-  int  n_entries_filled;
-} uw_data_t;
-
-#if defined (__ia64__) && defined (__hpux__)
-#include <uwx.h>
-#endif
-
-static _Unwind_Reason_Code
-trace_callback (struct _Unwind_Context * uw_context, uw_data_t * uw_data)
-{
-  char * pc;
-
-#if defined (__ia64__) && defined (__hpux__) && defined (USE_LIBUNWIND_EXCEPTIONS)
-  /* Work around problem with _Unwind_GetIP on ia64 HP-UX. */
-  uwx_get_reg ((struct uwx_env *) uw_context, UWX_REG_IP, (uint64_t *) &pc);
-#else
-  pc = (char *) _Unwind_GetIP (uw_context);
-#endif
-
-  if (uw_data->n_frames_skipped < uw_data->n_frames_to_skip)
-    {
-      uw_data->n_frames_skipped ++;
-      return _URC_NO_REASON;
-    }
-
-  if (uw_data->n_entries_filled >= uw_data->max_len)
-    return _URC_NORMAL_STOP;
-
-  if (pc < (char *)uw_data->exclude_min || pc > (char *)uw_data->exclude_max)
-    uw_data->traceback [uw_data->n_entries_filled ++] = pc + PC_ADJUST;
-
-  return _URC_NO_REASON;
-}
-
-#endif
-
-/********************
- * __gnat_backtrace *
- ********************/
-
-int
-__gnat_backtrace (void ** traceback __attribute__((unused)),
-		  int max_len __attribute__((unused)),
-		  void * exclude_min __attribute__((unused)),
-		  void * exclude_max __attribute__((unused)),
-		  int skip_frames __attribute__((unused)))
-{
-#if defined (__USING_SJLJ_EXCEPTIONS__)
-  /* We have no unwind material (tables) at hand with sjlj eh, and no
-     way to retrieve complete and accurate call chain information from
-     the context stack we maintain.  */
-  return 0;
-#else
-  uw_data_t uw_data;
-  /* State carried over during the whole unwinding process.  */
-
-  uw_data.traceback   = traceback;
-  uw_data.max_len     = max_len;
-  uw_data.exclude_min = exclude_min;
-  uw_data.exclude_max = exclude_max;
-
-  uw_data.n_frames_to_skip = skip_frames;
-
-  uw_data.n_frames_skipped = 0;
-  uw_data.n_entries_filled = 0;
-
-  _Unwind_Backtrace ((_Unwind_Trace_Fn)trace_callback, &uw_data);
-
-  return uw_data.n_entries_filled;
-#endif
-}