[patch, testsuite, objc] committed fix testsuite aspect of PR44488

[IainS <developer@sandoe-acoustics.co.uk>]

committed, under mike's pre-appr. of objc testsuite fixes.
tested on {powerpc,i686}-apple-darwin9, x86_64-apple-darwin10, x86_64- 
unknown-linux-gnu, cris-elf (sim), mipsia64(sim).
will let it settle for a few days, and then apply to 4.5

r162144
Iain

	PR objc/44488
	* lib/objc-torture.exp (objc-set-runtime-options): Base runtime list
	on the target.  Make sure that we can assemble the emitted asm when
	the test type is 'compile'.

Index: gcc/testsuite/lib/objc-torture.exp
===================================================================
--- gcc/testsuite/lib/objc-torture.exp	(revision 162143)
+++ gcc/testsuite/lib/objc-torture.exp	(working copy)
@@ -23,17 +23,24 @@ load_lib target-supports.exp
  # Make sure that the runtime list is re-evaluated for each multilib.
  proc objc-set-runtime-options { dowhat args } {
      global OBJC_RUNTIME_OPTIONS
-    if ![info exists OBJC_RUNTIME_OPTIONS] {
-	set rtlist [list "-fgnu-runtime" "-fnext-runtime" ]
-    } else {
-	set rtlist [list "-fgnu-runtime" "-fnext-runtime" ]
-	foreach other $OBJC_RUNTIME_OPTIONS {
-	    # Don't do tests twice...
-	    if { ( $other == "-fnext-runtime"  || $other == "-fgnu- 
runtime" ) } {
-		continue
-	    }
-	    lappend rtlist $other
+    set rtlist [list "-fgnu-runtime" ]
+    # At present (4.6), the only NeXT runtime target is Darwin.
+    # The previously used approach of testing trivial compiles is not  
reliable
+    # for determining the absence of the NeXT runtime, since a non- 
Darwin
+    # installation can have the objc headers present in the same  
locations
+    # that Darwin uses.  If NeXT is ported to another target, then it  
should
+    # be listed here.
+    if [istarget "*-*-darwin*" ] {
+      lappend rtlist "-fnext-runtime"
+    }
+    if [info exists OBJC_RUNTIME_OPTIONS] {
+      foreach other $OBJC_RUNTIME_OPTIONS {
+	# Don't do tests twice...
+	if { ( $other == "-fnext-runtime"  || $other == "-fgnu-runtime" ) } {
+	  continue
  	}
+	lappend rtlist $other
+      }
      }

      set OBJC_RUNTIME_OPTIONS ""
@@ -49,8 +56,10 @@ proc objc-set-runtime-options { dowhat args } {
  	if [info exists dowhat] {
            switch $dowhat {
  	    "compile" {
-	      set compile_type "assembly"
-	      set output_file "trivial.s"
+              # We should check that the generated asm is sensible,  
so do
+              # the equivalent of -c.
+	      set compile_type "object"
+	      set output_file "trivial.o"
  	      set comp_output [objc_target_compile \
  	        "$srcdir/$subdir/trivial.m" "$output_file" "$compile_type"  
$options]