fix-header.c (enum special_file): Undefine enumerators if they are already…

fix-header.c (enum special_file): Undefine enumerators if they are already defined by include files.

d
	* fix-header.c (enum special_file): Undefine enumerators if they
	are already defined by include files.
	* fixproto (rel_source_file in unistd.h stdlib.h): Prefix file protection
	macro with '__' to not pollute user namespace.

From-SVN: r19297

gcc/fix-header.c

@@ -127,9 +127,21 @@ char *inf_ptr;
 enum special_file
 {
   no_special,
+#ifdef errno_h
+#undef errno_h
+#endif
   errno_h,
+#ifdef stdio_h
+#undef stdio_h
+#endif
   stdio_h,
+#ifdef stdlib_h
+#undef stdlib_h
+#endif
   stdlib_h,
+#ifdef sys_stat_h
+#undef sys_stat_h
+#endif
   sys_stat_h
 };