mv compiler to compiler/

compiler/rustc_codegen_ssa/src/back/archive.rs

@@ -0,0 +1,56 @@
+use rustc_session::Session;
+use rustc_span::symbol::Symbol;
+
+use std::io;
+use std::path::{Path, PathBuf};
+
+pub fn find_library(name: Symbol, search_paths: &[PathBuf], sess: &Session) -> PathBuf {
+    // On Windows, static libraries sometimes show up as libfoo.a and other
+    // times show up as foo.lib
+    let oslibname = format!(
+        "{}{}{}",
+        sess.target.target.options.staticlib_prefix,
+        name,
+        sess.target.target.options.staticlib_suffix
+    );
+    let unixlibname = format!("lib{}.a", name);
+
+    for path in search_paths {
+        debug!("looking for {} inside {:?}", name, path);
+        let test = path.join(&oslibname);
+        if test.exists() {
+            return test;
+        }
+        if oslibname != unixlibname {
+            let test = path.join(&unixlibname);
+            if test.exists() {
+                return test;
+            }
+        }
+    }
+    sess.fatal(&format!(
+        "could not find native static library `{}`, \
+                         perhaps an -L flag is missing?",
+        name
+    ));
+}
+
+pub trait ArchiveBuilder<'a> {
+    fn new(sess: &'a Session, output: &Path, input: Option<&Path>) -> Self;
+
+    fn add_file(&mut self, path: &Path);
+    fn remove_file(&mut self, name: &str);
+    fn src_files(&mut self) -> Vec<String>;
+
+    fn add_rlib(
+        &mut self,
+        path: &Path,
+        name: &str,
+        lto: bool,
+        skip_objects: bool,
+    ) -> io::Result<()>;
+    fn add_native_library(&mut self, name: Symbol);
+    fn update_symbols(&mut self);
+
+    fn build(self);
+}