Some changes

build.sh

@@ -76,7 +76,7 @@ time $RUSTC target/libcore/src/libcore/lib.rs --crate-type lib --crate-name core
 pushd xargo
 rm -r ~/.xargo/HOST || true
 export XARGO_RUST_SRC=$(pwd)'/../target/libcore/src'
-time xargo build --color always
+time SHOULD_CODEGEN=1 xargo build --color always
 rm -r target/
 popd
 

xargo/Xargo.toml

@@ -1,9 +1,7 @@
 [dependencies]
 core = {}
-
-# Disabled due to bug in current cranelift version, fixed in master
-#alloc = {}
-#alloc_system = {}
+alloc = {}
+alloc_system = {}
 
 # Disabled due to missing support for many things (intrinsics, etc) in rustc_codegen_cranelift
 #std = {features = ["force_alloc_system"]}