mv compiler to compiler/

compiler/rustc_target/src/spec/linux_base.rs

@@ -0,0 +1,33 @@
+use crate::spec::{LinkArgs, LinkerFlavor, RelroLevel, TargetOptions};
+
+pub fn opts() -> TargetOptions {
+    let mut args = LinkArgs::new();
+    args.insert(
+        LinkerFlavor::Gcc,
+        vec![
+            // We want to be able to strip as much executable code as possible
+            // from the linker command line, and this flag indicates to the
+            // linker that it can avoid linking in dynamic libraries that don't
+            // actually satisfy any symbols up to that point (as with many other
+            // resolutions the linker does). This option only applies to all
+            // following libraries so we're sure to pass it as one of the first
+            // arguments.
+            "-Wl,--as-needed".to_string(),
+            // Always enable NX protection when it is available
+            "-Wl,-z,noexecstack".to_string(),
+        ],
+    );
+
+    TargetOptions {
+        dynamic_linking: true,
+        executables: true,
+        target_family: Some("unix".to_string()),
+        linker_is_gnu: true,
+        has_rpath: true,
+        pre_link_args: args,
+        position_independent_executables: true,
+        relro_level: RelroLevel::Full,
+        has_elf_tls: true,
+        ..Default::default()
+    }
+}