mv compiler to compiler/

compiler/rustc_target/src/spec/linux_kernel_base.rs

@@ -0,0 +1,24 @@
+use crate::spec::{LinkArgs, LinkerFlavor, PanicStrategy, RelocModel, RelroLevel, TargetOptions};
+
+pub fn opts() -> TargetOptions {
+    let mut pre_link_args = LinkArgs::new();
+    pre_link_args.insert(
+        LinkerFlavor::Gcc,
+        vec!["-Wl,--as-needed".to_string(), "-Wl,-z,noexecstack".to_string()],
+    );
+
+    TargetOptions {
+        disable_redzone: true,
+        panic_strategy: PanicStrategy::Abort,
+        stack_probes: true,
+        eliminate_frame_pointer: false,
+        linker_is_gnu: true,
+        position_independent_executables: true,
+        needs_plt: true,
+        relro_level: RelroLevel::Full,
+        relocation_model: RelocModel::Static,
+        pre_link_args,
+
+        ..Default::default()
+    }
+}