powerpc garbage collect test

[Alan Modra]

ld's garbage collection test on powerpc64 catered for old compilers
(pre -mcmodel=medium support), setting options that caused the test to
fail.  Which meant the test wasn't really testing anything.  Get rid
of that old compiler support, and avoid -fPIE fails on ppc32.

	* testsuite/ld-gc/gc.exp: Don't set -mminimal-toc for powerpc64,
	and remove powerpc64 xfail.  Use -fno-PIE for ppc32.

diff --git a/ld/testsuite/ld-gc/gc.exp b/ld/testsuite/ld-gc/gc.exp
index ea3316887e..285e7d1cb5 100644
--- a/ld/testsuite/ld-gc/gc.exp
+++ b/ld/testsuite/ld-gc/gc.exp
@@ -26,9 +26,9 @@ if ![check_gc_sections_available] {
 set cflags "-ffunction-sections -fdata-sections $NOSANTIZE_CFLAGS"
 set objfile "tmpdir/gc.o"
 
-if [istarget powerpc64*-*-*] {
-    # otherwise with -mcmodel=medium gcc we get XPASSes.
-    set cflags "$cflags -mminimal-toc"
+if { [istarget powerpc*-*-*] && ![istarget powerpc64*-*-*] } {
+    # Avoid using .got2 for powerpc -m32
+    set cflags "$cflags $NOPIE_CFLAGS"
 }
 
 if { [istarget m681*-*-*] || [istarget m68hc1*-*-*] } {
@@ -71,9 +71,6 @@ proc test_gc { testname filename linker ldflags} {
 	fail $testname
 	return
     }
-    #ppc64_elf_gc_mark_hook needs to be taught how to look through
-    #the .toc section to properly mark variable sections for gc.
-    setup_xfail "powerpc64*-*-*"
     if {[info exists nm_output(unused_func)] \
 	    || [info exists nm_output(unused_var)]} {
 	send_log "unused section still here\n"

-- 
Alan Modra
Australia Development Lab, IBM