s12z and h8300 no-print-map-discarded fails

[Alan Modra]

This tidies the remaining --no-print-map-discarded fails.  h8300-elf
warns on a section without flags, and s12z doesn't support
--gc-sections.

bfd/
	* elf32-s12z.c (elf_backend_can_gc_sections): Don't define
ld/
	* testsuite/ld-gc/skip-map-discarded.s: Add section attributes.
	* testsuite/lib/ld-lib.exp (check_gc_sections_available): Add
	s12z to list of targets not supporting --gc-sections.

diff --git a/bfd/elf32-s12z.c b/bfd/elf32-s12z.c
index a8f9b4aae1..60f163b9f3 100644
--- a/bfd/elf32-s12z.c
+++ b/bfd/elf32-s12z.c
@@ -318,6 +318,5 @@ s12z_elf_set_mach_from_flags (bfd *abfd)
 #define elf_info_to_howto_rel			s12z_info_to_howto_rel
 #define elf_backend_object_p			s12z_elf_set_mach_from_flags
 #define elf_backend_final_write_processing	NULL
-#define elf_backend_can_gc_sections		1
 
 #include "elf32-target.h"
diff --git a/ld/testsuite/ld-gc/skip-map-discarded.s b/ld/testsuite/ld-gc/skip-map-discarded.s
index 630aab0d9c..be2de6084a 100644
--- a/ld/testsuite/ld-gc/skip-map-discarded.s
+++ b/ld/testsuite/ld-gc/skip-map-discarded.s
@@ -1,5 +1,6 @@
-.globl __start
+	.globl	__start
 __start:
-	.section	_foo
+
+	.section _foo,"ax",%progbits
 foo:
 	.long	1
diff --git a/ld/testsuite/lib/ld-lib.exp b/ld/testsuite/lib/ld-lib.exp
index dae6673758..dc55dc8034 100644
--- a/ld/testsuite/lib/ld-lib.exp
+++ b/ld/testsuite/lib/ld-lib.exp
@@ -1043,6 +1043,7 @@ proc check_gc_sections_available { } {
 	    || [istarget mn10200-*-*]
 	    || [istarget pj*-*-*]
 	    || [istarget pru*-*-*]
+	    || [istarget s12z-*-*]
 	    || [istarget xgate-*-*] } {
 	    set gc_sections_available_saved 0
 	    return 0

-- 
Alan Modra
Australia Development Lab, IBM