for forked cortex-m

Cargo.toml

 [package]
 name = "cortex-m-debug"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Per Lindgren <per.lindgren@ltu.se>"]
 
 [dependencies]

src/lib.rs

@@ -4,18 +4,24 @@
 #[macro_export]
 macro_rules! ip {
     ($s:expr) => {
+		{
+	    	extern crate cortex_m;
 	        #[allow(unsafe_code)]
 	        cortex_m::itm::write_str(
 	            unsafe { &(&*cortex_m::peripheral::ITM.get()).stim[0] },
 	            $s
 	        );
+	    }
     };
     ($($arg:tt)*) => {
+		{
+			extern crate cortex_m;
 	        #[allow(unsafe_code)]
 	        cortex_m::itm::write_fmt(
 	            unsafe { &(&*cortex_m::peripheral::ITM.get()).stim[0] },
-            format_args!($($arg)*
-        ));
+	            format_args!($($arg)*)
+	        );
+		}
     }
 }