[Bug other/11651] New: gcov aborts if empty .da files (patch attached)

["laurent dot deniel at free dot fr" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11651

           Summary: gcov aborts if empty .da files (patch attached)
           Product: gcc
           Version: 3.2.3
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: other
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: laurent dot deniel at free dot fr
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: any-any-any
  GCC host triplet: any-any-any
GCC target triplet: any-any-any

Sometimes it is required to create empty .da files with appropriate
rights to be able to run the instrumented executable with different users.
But then, if some source files have not been executed, some .da files 
remain empty making gcov aborts. 

The simple fix below simply does the same thing with empty .da file as 
if the file was not present.

--- gcov.c.ori  2003-07-23 22:17:41.000000000 +0200
+++ gcov.c      2003-07-23 22:25:50.000000000 +0200
@@ -471,6 +471,18 @@
       fnotice (stderr, "Could not open data file %s.\n", da_file_name);
       fnotice (stderr, "Assuming that all execution counts are zero.\n");
     }
+
+  /* Check for empty .da file. Just assume that all execution counts are
+     zero in this case. */
+  /* Set the EOF condition if at the end of file.  */
+  ungetc (getc (da_file), da_file);
+  if (feof (da_file))
+    {
+      fnotice (stderr, "data file %s is empty.\n", da_file_name);
+      fnotice (stderr, "Assuming that all execution counts are zero.\n");
+      fclose(da_file);
+      da_file = NULL;
+    }
  
   bbg_file = fopen (bbg_file_name, "rb");
   if (bbg_file == NULL)