Clear HAS_RELOC if there are no relocations

The HAS_RELOC bit should be cleared when relocations are removed from
relocatable files.

bfd/

	PR binutils/19547
	* elf.c (assign_section_numbers): Clear HAS_RELOC if there are
	no relocations in relocatable files.

binutils/

	PR binutils/19547
	* testsuite/binutils-all/objcopy.exp
	(objcopy_test_without_global_symbol): New proc.
	Run objcopy_test_without_global_symbol.
	* testsuite/binutils-all/pr19547.c: New file.

bfd/ChangeLog

@@ -1,3 +1,9 @@
+2016-02-02  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/19547
+	* elf.c (assign_section_numbers): Clear HAS_RELOC if there are
+	no relocations in relocatable files.
+
 2016-02-01  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR ld/19553

bfd/elf.c

@@ -3355,6 +3355,8 @@ assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
   /* SHT_GROUP sections are in relocatable files only.  */
   if (link_info == NULL || bfd_link_relocatable (link_info))
     {
+      bfd_size_type reloc_count = 0;
+
       /* Put SHT_GROUP sections first.  */
       for (sec = abfd->sections; sec != NULL; sec = sec->next)
 	{
@@ -3371,7 +3373,14 @@ assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
 	      else
 		d->this_idx = section_number++;
 	    }
+
+	  /* Count relocations.  */
+	  reloc_count += sec->reloc_count;
 	}
+
+      /* Clear HAS_RELOC if there are no relocations.  */
+      if (reloc_count == 0)
+	abfd->flags &= ~HAS_RELOC;
     }
 
   for (sec = abfd->sections; sec; sec = sec->next)

binutils/ChangeLog

@@ -1,3 +1,11 @@
+2016-02-02  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/19547
+	* testsuite/binutils-all/objcopy.exp
+	(objcopy_test_without_global_symbol): New proc.
+	Run objcopy_test_without_global_symbol.
+	* testsuite/binutils-all/pr19547.c: New file.
+
 2016-01-28  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR binutils/19523

binutils/testsuite/binutils-all/objcopy.exp

@@ -1104,3 +1104,43 @@ if [is_elf_format] {
     run_dump_test "exclude-1b"
 }
 run_dump_test "localize-hidden-2"
+
+# Test objcopying an object file without global symbol
+
+proc objcopy_test_without_global_symbol { } {
+    global OBJCOPY
+    global OBJCOPYFLAGS
+    global OBJDUMP
+    global OBJDUMPFLAGS
+    global srcdir
+    global subdir
+
+    set test "strip without global symbol "
+
+    if { [target_compile $srcdir/$subdir/pr19547.c tmpdir/pr19547.o object debug] != "" } {
+	untested $test
+	return
+    }
+
+    if [is_remote host] {
+	set objfile [remote_download host tmpdir/pr19547.o]
+    } else {
+	set objfile tmpdir/pr19547.o
+    }
+
+    set exec_output [binutils_run $OBJCOPY "$OBJCOPYFLAGS --strip-unneeded $objfile"]
+    if ![string equal "" $exec_output] {
+	fail $test
+	return
+    }
+
+    set exec_output [binutils_run $OBJDUMP "$OBJDUMPFLAGS -t $objfile"]
+    if {![regexp "no symbols" $exec_output]} {
+	fail $test
+	return
+    }
+
+    pass $test
+}
+
+objcopy_test_without_global_symbol

binutils/testsuite/binutils-all/pr19547.c

@@ -0,0 +1 @@
+static char foo[]__attribute__ ((used)) = "foo";