entered into RCS

From-SVN: r4200

gcc/config/i386/svr3dbx.h

+/* Definitions for Intel 386 running system V, using dbx-in-coff encapsulation.
+   Copyright (C) 1992 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.  */
+
+#include "i386/svr3gas.h"
+
+/* We do not want to output SDB debugging information.  */
+
+#undef SDB_DEBUGGING_INFO
+
+/* We want to output DBX debugging information.  */
+
+#define DBX_DEBUGGING_INFO
+
+/* Compensate for botch in dbxout_init/dbxout_source_file which
+   unconditionally drops the first character from ltext_label_name */
+
+#undef ASM_GENERATE_INTERNAL_LABEL
+#define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)	\
+    sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
+
+/* With the current gas, .align N aligns to an N-byte boundary.
+   This is done to be compatible with the system assembler.
+   You have specify -DOTHER_ALIGN wenn building gas-1.38.1. */
+
+#undef ASM_OUTPUT_ALIGN
+#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
+     if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
+
+/* Align labels, etc. at 4-byte boundaries.
+   For the 486, align to 16-byte boundary for sake of cache.  */
+
+#undef ASM_OUTPUT_ALIGN_CODE
+#define ASM_OUTPUT_ALIGN_CODE(FILE)			\
+     fprintf ((FILE), "\t.align %d,0x90\n",		\
+	      TARGET_486 ? 16 : 4);  /* Use log of 16 or log of 4 as arg.  */
+
+/* Align start of loop at 4-byte boundary.  */
+
+#undef ASM_OUTPUT_LOOP_ALIGN
+#define ASM_OUTPUT_LOOP_ALIGN(FILE) \
+     fprintf ((FILE), "\t.align 4,0x90\n");
+
+
+/* Additional overrides needed for dbx-in-coff gas, mostly taken from pbb.h */
+
+/* Although the gas we use can create .ctor and .dtor sections from N_SETT
+   stabs, it does not support section directives, so we need to have the loader
+   define the lists.
+ */
+#define CTOR_LISTS_DEFINED_EXTERNALLY
+
+/* similar to default, but allows for the table defined by ld with svr3.ifile. 
+   nptrs is always 0.  So we need to instead check that __DTOR_LIST__[1] != 0.
+   The old check is left in so that the same macro can be used if and when  
+   a future version of gas does support section directives. */
+
+#define DO_GLOBAL_DTORS_BODY {int nptrs = *(int *)__DTOR_LIST__; int i; \
+  if (nptrs == -1 || (__DTOR_LIST__[0] == 0 && __DTOR_LIST__[1] != 0))  \
+    for (nptrs = 0; __DTOR_LIST__[nptrs + 1] != 0; nptrs++); 		\
+  for (i = nptrs; i >= 1; i--)						\
+    __DTOR_LIST__[i] (); }
+
+/* Use crt1.o as a startup file and crtn.o as a closing file.  */
+/*
+ * The loader directive file svr3.ifile defines how to merge the constructor 
+ * sections into the data section.  Also, since gas only puts out those 
+ * sections in response to N_SETT stabs, and does not (yet) have a 
+ * ".sections" directive, svr3.ifile also defines the list symbols 
+ * __DTOR_LIST__ and __CTOR_LIST__.
+ */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{!r:%{!z:svr3.ifile%s}%{z:svr3z.ifile%s}}\
+   %{pg:gcrt1.o%s}%{!pg:%{posix:%{p:mcrtp1.o%s}%{!p:crtp1.o%s}}%{!posix:%{p:mcrt1.o%s}%{!p:crt1.o%s}}} \
+   %{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp}"
+  
+#define ENDFILE_SPEC "crtn.o%s"
+  
+#undef LIB_SPEC
+#define LIB_SPEC "%{posix:-lcposix} %{shlib:-lc_s} -lc -lg"

gcc/config/i386/t-svr3dbx

+# gas 1.38.1 supporting dbx-in-coff requires a link script.
+
+EXTRA_PARTS=svr3.ifile svr3z.ifile
+
+svr3.ifile: $(srcdir)/config/i386/svr3.ifile
+	rm -f svr3.ifile; cp $(srcdir)/config/i386/svr3.ifile .
+
+svr3z.ifile: $(srcdir)/config/i386/svr3z.ifile
+	rm -f svr3z.ifile; cp $(srcdir)/config/i386/svr3z.ifile .