Misc changes

build_sysroot/Cargo.toml

@@ -13,3 +13,6 @@ alloc_system = { path = "./alloc_system" }
 [patch.crates-io]
 rustc-std-workspace-core = { path = "./sysroot_src/src/tools/rustc-std-workspace-core" }
 compiler_builtins = { path = "./compiler_builtins" }
+
+[profile.release]
+debug = true

build_sysroot/build_sysroot.sh

@@ -6,6 +6,7 @@ cd $(dirname "$0")
 cargo clean
 rm Cargo.lock 2>/dev/null || true
 rm -r sysroot 2>/dev/null || true
+rm -r target 2>/dev/null || true
 
 # FIXME find a better way to get the target triple
 unamestr=`uname`