re PR gcov-profile/64123 (Instrumented Firefox segfaults on start)

	PR gcov/64123
	* gcov-io.c (gcov_var): Export.

From-SVN: r220424

gcc/ChangeLog

 2015-02-04  Jan Hubicka  <hubicka@ucw.cz>
 
+	PR gcov/64123
+	* gcov-io.c (gcov_var): Export.
+
+2015-02-04  Jan Hubicka  <hubicka@ucw.cz>
+
 	PR middle-end/64922
 	* ipa-prop.c (update_indirect_edges_after_inlining): Correctly update
 	edges that become speculative.

gcc/gcov-io.c

@@ -39,7 +39,7 @@ static void gcov_allocate (unsigned);
 /* Optimum number of gcov_unsigned_t's read from or written to disk.  */
 #define GCOV_BLOCK_SIZE (1 << 10)
 
-GCOV_LINKAGE ATTRIBUTE_HIDDEN struct gcov_var
+struct gcov_var
 {
   FILE *file;
   gcov_position_t start;	/* Position of first byte of block */