Don't build alloc_system as part of the sysroot

Author: bjorn3

build_sysroot/Cargo.lock

@@ -9,8 +9,6 @@ alloc = { path = "./sysroot_src/library/alloc" }
 std = { path = "./sysroot_src/library/std", features = ["panic_unwind", "backtrace"] }
 test = { path = "./sysroot_src/library/test" }
 
-alloc_system = { path = "./alloc_system" }
-
 compiler_builtins = { version = "0.1.39", default-features = false, features = ["no-asm"] }
 
 [patch.crates-io]

build_sysroot/Cargo.toml

@@ -1,4 +1,4 @@
-#![feature(start, box_syntax, alloc_system, core_intrinsics, alloc_prelude, alloc_error_handler)]
+#![feature(start, box_syntax, core_intrinsics, alloc_prelude, alloc_error_handler)]
 #![no_std]
 
 extern crate alloc;

build_sysroot/alloc_system/Cargo.toml

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 #![no_std]
-#![feature(allocator_api)]
+#![feature(allocator_api, rustc_private)]
 #![cfg_attr(any(unix, target_os = "redox"), feature(libc))]
 
 // The minimum alignment guaranteed by the architecture. This value is used to

example/alloc_example.rs

@@ -34,6 +34,9 @@ function no_sysroot_tests() {
 }
 
 function base_sysroot_tests() {
+    echo "[AOT] alloc_system"
+    $MY_RUSTC example/alloc_system.rs --crate-type lib --target "$TARGET_TRIPLE"
+
     echo "[AOT] alloc_example"
     $MY_RUSTC example/alloc_example.rs --crate-type bin --target "$TARGET_TRIPLE"
     $RUN_WRAPPER ./target/out/alloc_example