Actually disable optimize in --disable-optimize case, duh.

Author: graydon

Makefile.in

@@ -15,7 +15,8 @@ CFG_GCC_CFLAGS := -fno-strict-aliasing
 CFG_GCC_LINK_FLAGS :=
 CFG_BOOT_FLAGS := $(BOOT_FLAGS)
 ifdef CFG_DISABLE_OPTIMIZE
-  CFG_RUSTC_FLAGS := -O
+  $(info cfg: disabling rustc optimization (CFG_DISABLE_OPTIMIZE))
+  CFG_RUSTC_FLAGS := -nowarn
 else
   CFG_RUSTC_FLAGS := -nowarn -O
 endif