add option to build enforcing mutability

nikomatsakis · nikomatsakis · commit 674587cfe5a8 · 2012-03-07T05:58:05.000-08:00
diff --git a/Makefile.in b/Makefile.in
@@ -82,6 +82,9 @@ endif
 ifdef SAVE_TEMPS
   CFG_RUSTC_FLAGS += --save-temps
 endif
+ifdef ENFORCE_MUT_VARS
+  CFG_RUSTC_FLAGS += --enforce-mut-vars
+endif
 ifdef TIME_PASSES
   CFG_RUSTC_FLAGS += --time-passes
 endif
