Do not produce any output if the output file will be empty

diff --git a/binutils/ChangeLog b/binutils/ChangeLog
index f26615d..0601728 100644 (file)
--- a/binutils/ChangeLog
+++ b/binutils/ChangeLog
@@ -1,3 +1,10 @@
+2004-01-12  Nick Clifton  <nickc@redhat.com>
+
+       * objcopy.c (copy_object): Make the function boolean, returning
+       FALSE upon failure.
+        (copy_archive): Handle the return value from copy_object.
+        (copy_file): Likewise.
+
 2004-01-07  Nick Clifton  <nickc@redhat.com>
 
        * readelf.c (find_section): New function.  Locates a named

diff --git a/binutils/objcopy.c b/binutils/objcopy.c
index 32a1b7b..212b9bf 100644 (file)
--- a/binutils/objcopy.c
+++ b/binutils/objcopy.c
@@ -1084,9 +1084,10 @@ add_redefine_syms_file (const char *filename)
   free (buf);
 }
 
-/* Copy object file IBFD onto OBFD.  */
+/* Copy object file IBFD onto OBFD.
+   Trues TRUE upon success, FALSE otherwise.  */
 
-static void
+static bfd_boolean
 copy_object (bfd *ibfd, bfd *obfd)
 {
   bfd_vma start;
@@ -1103,13 +1104,13 @@ copy_object (bfd *ibfd, bfd *obfd)
   if (ibfd->xvec->byteorder != obfd->xvec->byteorder
       && ibfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN
       && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
-    {
-      fatal (_("Unable to change endianness of input file(s)"));
-      return;
-    }
+    fatal (_("Unable to change endianness of input file(s)"));
 
   if (!bfd_set_format (obfd, bfd_get_format (ibfd)))
-    RETURN_NONFATAL (bfd_get_filename (obfd));
+    {
+      bfd_nonfatal (bfd_get_filename (obfd));
+      return FALSE;
+    }
 
   if (verbose)
     printf (_("copy from %s(%s) to %s(%s)\n"),
@@ -1135,7 +1136,10 @@ copy_object (bfd *ibfd, bfd *obfd)
 
       if (!bfd_set_start_address (obfd, start)
          || !bfd_set_file_flags (obfd, flags))
-       RETURN_NONFATAL (bfd_get_filename (ibfd));
+       {
+         bfd_nonfatal (bfd_get_filename (ibfd));
+         return FALSE;
+       }
     }
 
   /* Copy architecture of input file to output file.  */
@@ -1153,13 +1157,15 @@ copy_object (bfd *ibfd, bfd *obfd)
          non_fatal (_("Warning: Output file cannot represent architecture %s"),
                     bfd_printable_arch_mach (bfd_get_arch (ibfd),
                                              bfd_get_mach (ibfd)));
-         status = 1;
-         return;
+         return FALSE;
        }
     }
 
   if (!bfd_set_format (obfd, bfd_get_format (ibfd)))
-    RETURN_NONFATAL (bfd_get_filename (ibfd));
+    {
+      bfd_nonfatal (bfd_get_filename (ibfd));
+      return FALSE;
+    }
 
   if (isympp)
     free (isympp);
@@ -1185,12 +1191,14 @@ copy_object (bfd *ibfd, bfd *obfd)
            {
              non_fatal (_("can't create section `%s': %s"),
                       padd->name, bfd_errmsg (bfd_get_error ()));
-             status = 1;
-             return;
+             return FALSE;
            }
 
          if (! bfd_set_section_size (obfd, padd->section, padd->size))
-           RETURN_NONFATAL (bfd_get_filename (obfd));
+           {
+             bfd_nonfatal (bfd_get_filename (obfd));
+             return FALSE;
+           }
 
          pset = find_section_list (padd->name, FALSE);
          if (pset != NULL)
@@ -1202,23 +1210,32 @@ copy_object (bfd *ibfd, bfd *obfd)
            flags = SEC_HAS_CONTENTS | SEC_READONLY | SEC_DATA;
 
          if (! bfd_set_section_flags (obfd, padd->section, flags))
-           RETURN_NONFATAL (bfd_get_filename (obfd));
+           {
+             bfd_nonfatal (bfd_get_filename (obfd));
+             return FALSE;
+           }
 
          if (pset != NULL)
            {
              if (pset->change_vma != CHANGE_IGNORE)
                if (! bfd_set_section_vma (obfd, padd->section,
                                           pset->vma_val))
-                 RETURN_NONFATAL (bfd_get_filename (obfd));
+                 {
+                   bfd_nonfatal (bfd_get_filename (obfd));
+                   return FALSE;
+                 }
 
              if (pset->change_lma != CHANGE_IGNORE)
                {
                  padd->section->lma = pset->lma_val;
-                 
+
                  if (! bfd_set_section_alignment
                      (obfd, padd->section,
                       bfd_section_alignment (obfd, padd->section)))
-                   RETURN_NONFATAL (bfd_get_filename (obfd));
+                   {
+                     bfd_nonfatal (bfd_get_filename (obfd));
+                     return FALSE;
+                   }
                }
            }
        }
@@ -1230,7 +1247,16 @@ copy_object (bfd *ibfd, bfd *obfd)
        (obfd, gnu_debuglink_filename);
 
       if (gnu_debuglink_section == NULL)
-       RETURN_NONFATAL (gnu_debuglink_filename);
+       {
+         bfd_nonfatal (gnu_debuglink_filename);
+         return FALSE;
+       }
+    }
+
+  if (bfd_count_sections (obfd) == 0)
+    {
+      non_fatal (_("there are no sections to be copied!"));
+      return FALSE;
     }
 
   if (gap_fill_set || pad_to_set)
@@ -1320,12 +1346,18 @@ copy_object (bfd *ibfd, bfd *obfd)
   dhandle = NULL;
   symsize = bfd_get_symtab_upper_bound (ibfd);
   if (symsize < 0)
-    RETURN_NONFATAL (bfd_get_filename (ibfd));
+    {
+      bfd_nonfatal (bfd_get_filename (ibfd));
+      return FALSE;
+    }
 
   osympp = isympp = xmalloc (symsize);
   symcount = bfd_canonicalize_symtab (ibfd, isympp);
   if (symcount < 0)
-    RETURN_NONFATAL (bfd_get_filename (ibfd));
+    {
+      bfd_nonfatal (bfd_get_filename (ibfd));
+      return FALSE;
+    }
 
   if (convert_debugging)
     dhandle = read_debugging_info (ibfd, isympp, symcount);
@@ -1370,7 +1402,7 @@ copy_object (bfd *ibfd, bfd *obfd)
       if (! write_debugging_info (obfd, dhandle, &symcount, &osympp))
        {
          status = 1;
-         return;
+         return FALSE;
        }
     }
 
@@ -1387,7 +1419,10 @@ copy_object (bfd *ibfd, bfd *obfd)
        {
          if (! bfd_set_section_contents (obfd, padd->section, padd->contents,
                                          0, padd->size))
-           RETURN_NONFATAL (bfd_get_filename (obfd));
+           {
+             bfd_nonfatal (bfd_get_filename (obfd));
+             return FALSE;
+           }
        }
     }
 
@@ -1395,7 +1430,10 @@ copy_object (bfd *ibfd, bfd *obfd)
     {
       if (! bfd_fill_in_gnu_debuglink_section
          (obfd, gnu_debuglink_section, gnu_debuglink_filename))
-       RETURN_NONFATAL (gnu_debuglink_filename);
+       {
+         bfd_nonfatal (gnu_debuglink_filename);
+         return FALSE;
+       }
     }
 
   if (gap_fill_set || pad_to_set)
@@ -1431,7 +1469,10 @@ copy_object (bfd *ibfd, bfd *obfd)
 
                  if (! bfd_set_section_contents (obfd, osections[i], buf,
                                                  off, now))
-                   RETURN_NONFATAL (bfd_get_filename (obfd));
+                   {
+                     bfd_nonfatal (bfd_get_filename (obfd));
+                     return FALSE;
+                   }
 
                  left -= now;
                  off += now;
@@ -1454,18 +1495,17 @@ copy_object (bfd *ibfd, bfd *obfd)
       non_fatal (_("%s: error copying private BFD data: %s"),
                 bfd_get_filename (obfd),
                 bfd_errmsg (bfd_get_error ()));
-      status = 1;
-      return;
+      return FALSE;
     }
 
   /* Switch to the alternate machine code.  We have to do this at the
      very end, because we only initialize the header when we create
      the first section.  */
-  if (use_alt_mach_code != 0)
-    {
-      if (!bfd_alt_mach_code (obfd, use_alt_mach_code))
-       non_fatal (_("unknown alternate machine code, ignored"));
-    }
+  if (use_alt_mach_code != 0
+      && ! bfd_alt_mach_code (obfd, use_alt_mach_code))
+    non_fatal (_("unknown alternate machine code, ignored"));
+
+  return TRUE;
 }
 
 #undef MKDIR
@@ -1512,6 +1552,7 @@ copy_archive (bfd *ibfd, bfd *obfd, const char *output_target)
       bfd *last_element;
       struct stat buf;
       int stat_status = 0;
+      bfd_boolean delete = TRUE;
 
       /* Create an output file for this member.  */
       output_name = concat (dir, "/",
@@ -1553,7 +1594,7 @@ copy_archive (bfd *ibfd, bfd *obfd, const char *output_target)
        RETURN_NONFATAL (output_name);
 
       if (bfd_check_format (this_element, bfd_object))
-       copy_object (this_element, output_bfd);
+       delete = ! copy_object (this_element, output_bfd);
 
       if (!bfd_close (output_bfd))
        {
@@ -1562,22 +1603,30 @@ copy_archive (bfd *ibfd, bfd *obfd, const char *output_target)
          status = 1;
        }
 
-      if (preserve_dates && stat_status == 0)
-       set_times (output_name, &buf);
+      if (delete)
+       {
+         unlink (output_name);
+         status = 1;
+       }
+      else
+       {
+         if (preserve_dates && stat_status == 0)
+           set_times (output_name, &buf);
 
-      /* Open the newly output file and attach to our list.  */
-      output_bfd = bfd_openr (output_name, output_target);
+         /* Open the newly output file and attach to our list.  */
+         output_bfd = bfd_openr (output_name, output_target);
 
-      l->obfd = output_bfd;
+         l->obfd = output_bfd;
 
-      *ptr = output_bfd;
-      ptr = &output_bfd->next;
+         *ptr = output_bfd;
+         ptr = &output_bfd->next;
 
-      last_element = this_element;
+         last_element = this_element;
 
-      this_element = bfd_openr_next_archived_file (ibfd, last_element);
+         this_element = bfd_openr_next_archived_file (ibfd, last_element);
 
-      bfd_close (last_element);
+         bfd_close (last_element);
+       }
     }
   *ptr = NULL;
 
@@ -1641,7 +1690,9 @@ copy_file (const char *input_filename, const char *output_filename,
   else if (bfd_check_format_matches (ibfd, bfd_object, &obj_matching))
     {
       bfd *obfd;
+      bfd_boolean delete;
     do_copy:
+
       /* bfd_get_target does not return the correct value until
          bfd_check_format succeeds.  */
       if (output_target == NULL)
@@ -1651,13 +1702,19 @@ copy_file (const char *input_filename, const char *output_filename,
       if (obfd == NULL)
        RETURN_NONFATAL (output_filename);
 
-      copy_object (ibfd, obfd);
+      delete = ! copy_object (ibfd, obfd);
 
       if (!bfd_close (obfd))
        RETURN_NONFATAL (output_filename);
 
       if (!bfd_close (ibfd))
        RETURN_NONFATAL (input_filename);
+
+      if (delete)
+       {
+         unlink (output_filename);
+         status = 1;
+       }
     }
   else
     {