--- a/gcc/common/config/alpha/alpha-common.c
+++ b/gcc/common/config/alpha/alpha-common.c
@@ -36,6 +36,17 @@ static const struct default_options alpha_option_optimization_table[] =
     { OPT_LEVELS_NONE, 0, NULL, 0 }
   };
 
+/* Implement TARGET_OPTION_INIT_STRUCT.  */
+
+static void
+alpha_option_init_struct (struct gcc_options *opts ATTRIBUTE_UNUSED)
+{
+#if TARGET_ABI_OPEN_VMS
+  /* Enable section anchors by default.  */
+  opts->x_flag_section_anchors = 1;
+#endif
+}
+
 /* Implement TARGET_HANDLE_OPTION.  */
 
 static bool
@@ -75,6 +86,9 @@ alpha_handle_option (struct gcc_options *opts,
 #undef TARGET_HANDLE_OPTION
 #define TARGET_HANDLE_OPTION alpha_handle_option
 
+#undef TARGET_OPTION_INIT_STRUCT
+#define TARGET_OPTION_INIT_STRUCT alpha_option_init_struct
+
 #undef TARGET_OPTION_OPTIMIZATION_TABLE
 #define TARGET_OPTION_OPTIMIZATION_TABLE alpha_option_optimization_table
 
diff --git a/gcc/config/alpha/alpha.c b/gcc/config/alpha/alpha.c
index 682e5be..9a43f80 100644
--- a/gcc/config/alpha/alpha.c
+++ b/gcc/config/alpha/alpha.c
@@ -9643,6 +9643,14 @@ alpha_conditional_register_usage (void)
 #define TARGET_STDARG_OPTIMIZE_HOOK alpha_stdarg_optimize_hook
 #endif
 
+/* Use 16-bits anchor.  */
+#undef TARGET_MIN_ANCHOR_OFFSET
+#define TARGET_MIN_ANCHOR_OFFSET -0x7fff - 1
+#undef TARGET_MAX_ANCHOR_OFFSET
+#define TARGET_MAX_ANCHOR_OFFSET 0x7fff
+#undef TARGET_USE_BLOCKS_FOR_CONSTANT_P
+#define TARGET_USE_BLOCKS_FOR_CONSTANT_P hook_bool_mode_const_rtx_true
+
 #undef TARGET_RTX_COSTS
 #define TARGET_RTX_COSTS alpha_rtx_costs
 #undef TARGET_ADDRESS_COST