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Switch to DWARF-2 on sparc-sun-solaris2.7+

This patch implements the switch from STABS to DWARF-2 as the default 
debugging format on sparc-sun-solaris2.x (x >= 7).  Bootstrapped/regtested 
on various sparc*-sun-solaris2.* targets.  Moderately tested with GDB 5.3, 
6.0 and DBX 7.1.  And I've attached a patch against changes.html.

I'd also like to backport a few tweaks to SPARC-specific testcases from the 
mainline, which fix spurious failures when you cross-test between 32-bit and 
64-bit or with a non multilibed compiler.

OK for 3.4 branch?


2004-04-03  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* config/sparc/sol2-bi.h (PREFERRED_DEBUGGING_TYPE): Set
	to DWARF2_DEBUG unconditionally.
	(ASM_DEBUG_SPEC): Set the default to --gdwarf2 unconditionally.


2004-04-03  Eric Botcazou  <ebotcazou@libertysurf.fr>

	Backport from mainline:

	2004-03-26  James A. Morrison  <ja2morri@uwaterloo.ca>

	* gcc.dg/20001013-1.c: Run on 32-bit and 64-bit SPARC.
	* gcc.dg/20001101-1.c: Likewise.
	* gcc.dg/20001102-1.c: Likewise.

	2004-03-22  Eric Botcazou  <ebotcazou@libertysurf.fr>

	* gcc.dg/ultrasp2.c: Do not pass -m64.  Remove redundant lines.
	* gcc.dg/ultrasp4.c: Likewise.
	* gcc.dg/ultrasp8.c: Do not pass -m64.  Add sparcv9-*-*.


-- 
Eric Botcazou
Index: config/sparc/sol2-bi.h
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/sparc/sol2-bi.h,v
retrieving revision 1.14.4.1
diff -u -r1.14.4.1 sol2-bi.h
--- config/sparc/sol2-bi.h	1 Feb 2004 15:22:14 -0000	1.14.4.1
+++ config/sparc/sol2-bi.h	2 Apr 2004 09:39:50 -0000
@@ -216,17 +216,9 @@
 #define MULTILIB_DEFAULTS { "m64" }
 #endif
 
-/* We use stabs-in-elf in 32-bit mode, because that is what the native
-   toolchain uses.  But gdb can't handle truncated 32-bit stabs so we
-   use dwarf2 in 64-bit mode.  */
 #undef PREFERRED_DEBUGGING_TYPE
-#define PREFERRED_DEBUGGING_TYPE (TARGET_ARCH32 ? DBX_DEBUG : DWARF2_DEBUG)
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 
-/* We can't use the above definition for the purposes of specs.  */
 #if defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
-# if DEFAULT_ARCH32_P
-#  define ASM_DEBUG_SPEC "%{gdwarf-2*:--gdwarf2}%{!gdwarf-2*:%{g*:--gstabs}}"
-# else
-#  define ASM_DEBUG_SPEC "%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}"
-# endif
+# define ASM_DEBUG_SPEC "%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}"
 #endif

Index: htdocs/gcc-3.4/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-3.4/changes.html,v
retrieving revision 1.106
diff -u -r1.106 changes.html
--- htdocs/gcc-3.4/changes.html	23 Mar 2004 18:48:30 -0000	1.106
+++ htdocs/gcc-3.4/changes.html	2 Apr 2004 06:25:49 -0000
@@ -862,6 +862,10 @@
     <li>Several <a href="sparc-abi.html">ABI bugs</a> have been fixed.
     Unfortunately, these changes will break binary compatibility with
     earlier releases.</li>
+
+    <li>The default debugging format has been switched from STABS to
+    DWARF-2 for 32-bit code on Solaris 7 and later.  DWARF-2 is already
+    the default debugging format for 64-bit code on Solaris.</li>
   </ul>
 
 <h3>SuperH</h3>

Index: ultrasp2.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/testsuite/gcc.dg/ultrasp2.c,v
retrieving revision 1.2
diff -u -r1.2 ultrasp2.c
--- testsuite/gcc.dg/ultrasp2.c	15 May 2001 02:45:32 -0000	1.2
+++ testsuite/gcc.dg/ultrasp2.c	22 Mar 2004 06:49:50 -0000
@@ -4,10 +4,7 @@
 
 /* { dg-do compile } */
 /* { dg-options "" } */
-/* { dg-options "-O0 -m64" { target sparc64-*-* } } */
-/* { dg-options "-O0 -m64" { target sparcv9-*-* } } */
-/* { dg-options "" { target sparc-*-solaris2.[0-6] } } */
-/* { dg-options "" { target sparc-*-solaris2.[0-6].* } } */
+/* { dg-options "-O0" { target sparc64-*-* sparcv9-*-* } } */
 
 short foo() {
   short i = (short)(1<<15);
Index: ultrasp4.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/testsuite/gcc.dg/ultrasp4.c,v
retrieving revision 1.1
diff -u -r1.1 ultrasp4.c
--- testsuite/gcc.dg/ultrasp4.c	16 Jan 2002 17:44:24 -0000	1.1
+++ testsuite/gcc.dg/ultrasp4.c	22 Mar 2004 06:49:50 -0000
@@ -1,10 +1,7 @@
 /* Simplified from PR target/5309.  */
 /* { dg-do compile } */
 /* { dg-options "-O2" } */
-/* { dg-options "-O2 -m64 -mcpu=ultrasparc" { target sparc64-*-* } } */
-/* { dg-options "-O2 -m64 -mcpu=ultrasparc" { target sparcv9-*-* } } */
-/* { dg-options "-O2" { target sparc-*-solaris2.[0-6] } } */
-/* { dg-options "-O2" { target sparc-*-solaris2.[0-6].* } } */
+/* { dg-options "-O2 -mcpu=ultrasparc" { target sparc64-*-* sparcv9-*-* } } */
 
 long bar (unsigned int);
 long foo (long x, unsigned int y)
Index: ultrasp8.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/testsuite/gcc.dg/ultrasp8.c,v
retrieving revision 1.2
diff -u -r1.2 ultrasp8.c
--- testsuite/gcc.dg/ultrasp8.c	12 Apr 2003 17:45:01 -0000	1.2
+++ testsuite/gcc.dg/ultrasp8.c	22 Mar 2004 06:49:50 -0000
@@ -1,7 +1,7 @@
 /* PR target/10067 */
 /* Originator: <dat94ali@ludat.lth.se> */
 /* { dg-do compile { target sparc*-*-* } } */
-/* { dg-options "-O2 -m64 -mtune=supersparc" { target sparc64-*-* } } */
+/* { dg-options "-O2 -mtune=supersparc" { target sparc64-*-* sparcv9-*-* } } */
 
 struct _reent;
 
Index: testsuite/gcc.dg/20001013-1.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/testsuite/gcc.dg/20001013-1.c,v
retrieving revision 1.2
diff -u -p -r1.2 20001013-1.c
--- testsuite/gcc.dg/20001013-1.c	25 Mar 2002 22:33:43 -0000	1.2
+++ testsuite/gcc.dg/20001013-1.c	26 Mar 2004 07:30:03 -0000
@@ -1,7 +1,5 @@
-/* ??? It'd be nice to run this for sparc32 as well, if we could know
-   for sure that we're on an ultrasparc, rather than an older cpu.  */
-/* { dg-do run { target sparcv9-*-* sparc64-*-* } } */
-/* { dg-options "-O2 -m32 -mcpu=ultrasparc -mvis" } */
+/* { dg-do run { target sparc*-*-* } } */
+/* { dg-options "-O2 -mcpu=ultrasparc -mvis" } */
 
 int l;
 
Index: testsuite/gcc.dg/20001101-1.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/testsuite/gcc.dg/20001101-1.c,v
retrieving revision 1.2
diff -u -p -r1.2 20001101-1.c
--- testsuite/gcc.dg/20001101-1.c	27 Mar 2002 01:23:35 -0000	1.2
+++ testsuite/gcc.dg/20001101-1.c	26 Mar 2004 07:30:03 -0000
@@ -1,7 +1,5 @@
-/* ??? It'd be nice to run this for sparc32 as well, if we could know
-   for sure that we're on an ultrasparc, rather than an older cpu.  */
-/* { dg-do run { target sparcv9-*-* sparc64-*-* } } */
-/* { dg-options "-O2 -m32 -mcpu=ultrasparc -mvis" } */
+/* { dg-do run { target sparc*-*-* } } */
+/* { dg-options "-O2 -mcpu=ultrasparc -mvis" } */
 
 int foo(double a, int b, int c, double *d, int h)
 {
Index: testsuite/gcc.dg/20001102-1.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/testsuite/gcc.dg/20001102-1.c,v
retrieving revision 1.2
diff -u -p -r1.2 20001102-1.c
--- testsuite/gcc.dg/20001102-1.c	27 Mar 2002 01:23:35 -0000	1.2
+++ testsuite/gcc.dg/20001102-1.c	26 Mar 2004 07:30:03 -0000
@@ -1,7 +1,5 @@
-/* ??? It'd be nice to run this for sparc32 as well, if we could know
-   for sure that we're on an ultrasparc, rather than an older cpu.  */
-/* { dg-do run { target sparcv9-*-* sparc64-*-* } } */
-/* { dg-options "-O2 -m32 -mcpu=ultrasparc -mvis" } */
+/* { dg-do run { target sparc*-*-* } } */
+/* { dg-options "-O2 -mcpu=ultrasparc -mvis" } */
 
 int foo(double a, int b, int c, double *d, int h)
 {
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