re PR debug/42487 (FAIL: gcc.dg/debug/dwarf2/aranges-fnsec-1.c scan-assembler DW_AT_ranges)

	PR debug/42487
	* lib/target-supports.exp
	(check_effective_target_function_sections): New.
	* gcc.dg/debug/dwarf2/aranges-fnsec-1.c: Check that the target supports
	function sections before proceding.

From-SVN: r163326

gcc/testsuite/ChangeLog

+2010-08-18  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR debug/42487
+	* lib/target-supports.exp
+	(check_effective_target_function_sections): New.
+	* gcc.dg/debug/dwarf2/aranges-fnsec-1.c: Check that the target supports
+	function sections before proceding.
+	
 2010-08-17  Jakub Jelinek  <jakub@redhat.com>
 
 	PR fortran/45308

gcc/testsuite/gcc.dg/debug/dwarf2/aranges-fnsec-1.c

@@ -2,6 +2,7 @@
    text section if nothing went in there.  */
 /* Origin: Joseph Myers <joseph@codesourcery.com> */
 /* { dg-do compile } */
+/* { dg-require-effective-target function_sections } */
 /* { dg-options "-gdwarf-2 -ffunction-sections -w -dA" } */
 /* { dg-final { scan-assembler-not "\\.Letext0-\\.Ltext0" } } */
 /* { dg-final { scan-assembler-not "\\.Ltext0\[^\n\r\]*Offset 0x0" } } */

gcc/testsuite/lib/target-supports.exp

@@ -623,6 +623,20 @@ proc check_effective_target_tls_runtime {} {
     }]
 }
 
+# Return 1 if -ffunction-sections is supported, 0 otherwise.
+
+proc check_effective_target_function_sections {} {
+    # Darwin has its own scheme and silently accepts -ffunction-sections.
+    global target_triplet
+    if { [regexp ".*-.*-darwin.*" $target_triplet] } {
+	return 0
+    }
+    
+    return [check_no_compiler_messages functionsections assembly {
+ 	void foo (void) { }
+    } "-ffunction-sections"]
+}
+
 # Return 1 if compilation with -fgraphite is error-free for trivial 
 # code, 0 otherwise.