Initial revision

From-SVN: r224

gcc/gbl-ctors.h

+/* Definitions relating to the special __do_global_init function used
+   for getting g++ file-scope static objects constructed.  This file
+   wil get included either by libgcc2.c (for systems that don't support
+   a .init section) or by crtstuff.c (for those that do).
+
+   Written by Ron Guilmette (rfg@ncd.com)
+
+Copyright (C) 1991 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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 2, or (at your option)
+any later version.
+
+GNU CC 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 GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/*	This file contains definitions and declarations of things
+	relating to the normal start-up-time invocation of C++
+	file-scope static object constructors.  These declarations
+	and definitions are used by *both* libgcc2.c and by crtstuff.c.
+
+	Note that this file should only be compiled with GCC.
+*/
+
+#ifdef sun
+extern void on_exit (void*, void*);
+#define ON_EXIT(FUNC,ARG) on_exit ((FUNC), (ARG))
+#else
+#ifdef HAVE_ATEXIT
+extern void atexit (void (*) (void));
+#define ON_EXIT(FUNC,ARG) atexit ((FUNC))
+#endif
+#endif
+
+/*  Declare a pointer to void function type.  */
+
+typedef void (*func_ptr) (void);
+
+/* Declare the set of symbols use as begin and end markers for the lists
+   of global object constructors and global object descructors.  */
+
+extern func_ptr __CTOR_LIST__[];
+extern func_ptr __DTOR_LIST__[];
+
+/* Declare the routine which need to get invoked at program exit time.  */
+
+extern void __do_global_dtors ();
+
+/* Define a macro with the code which needs to be executed at program
+   start-up time.  This macro is used in two places in crtstuff.c (for
+   systems which support a .init section) and in one place in libgcc2.c
+   (for those system which do *not* support a .init section).  For all
+   three places where this code might appear, it must be identical, so
+   we define it once here as a macro to avoid various instances getting
+   out-of-sync with one another.  */
+
+/* The first word may or may not contain the number of pointers in the table.
+   In all cases, the table is null-terminated.
+   We ignore the first word and scan up to the null.  */
+
+/* Some systems use a different strategy for finding the ctors.
+   For example, svr3.  */
+#ifndef DO_GLOBAL_CTORS_BODY
+#define DO_GLOBAL_CTORS_BODY						\
+do {									\
+  func_ptr *p;								\
+  ON_EXIT (__do_global_dtors, 0);					\
+  for (p = __CTOR_LIST__ + 1; *p; )					\
+    (*p++) ();								\
+} while (0)
+#endif
+