Re: [PATCH] PR debug/42487, xfail scan-assembler on DW_AT_ranges in gcc.dg/debug/dwarf2/aranges-fnsec-1.c for darwin

[IainS <developer at sandoe-acoustics dot co dot uk>]

On 17 Aug 2010, at 16:58, Richard Henderson wrote:

> On 08/17/2010 08:48 AM, Jack Howarth wrote:
> >   Aren't the targets which don't support function sections also
> > those that set TARGET_ASM_FUNCTION_RODATA_SECTION to  
> > default_no_function_rodata_section?
>
> They should be the ones for which targetm.have_named_sections
> is false.  Er, which is now universally true, says grep.  We
> don't support any a.out targets anymore?
>
> I really have no idea, apparently.
>
> > Also, I noticed that we are currently passing some of the other - 
> > function-sections tests
> > on darwin...
>
> Iain explained this one -- .subsections_via_symbols allows many
> of the -function-sections type tests to succeed.  So, I'm really
> not sure how to proceed.  Mark?


like this....?
Iain

Index: gcc/testsuite/lib/target-supports.exp
===================================================================
--- gcc/testsuite/lib/target-supports.exp	(revision 163308)
+++ gcc/testsuite/lib/target-supports.exp	(working copy)
@@ -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.

Index: gcc/testsuite/gcc.dg/debug/dwarf2/aranges-fnsec-1.c
===================================================================
--- gcc/testsuite/gcc.dg/debug/dwarf2/aranges-fnsec-1.c	(revision  
163308)
+++ gcc/testsuite/gcc.dg/debug/dwarf2/aranges-fnsec-1.c	(working copy)
@@ -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" } } */