1 files changed, 69 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_ssa/src/back/archive.rs b/compiler/rustc_codegen_ssa/src/back/archive.rs
new file mode 100644
index 000000000..0d2aa483d
--- /dev/null
+++ b/compiler/rustc_codegen_ssa/src/back/archive.rs
@@ -0,0 +1,69 @@
+use rustc_session::cstore::DllImport;
+use rustc_session::Session;
+
+use std::io;
+use std::path::{Path, PathBuf};
+
+pub(super) fn find_library(
+    name: &str,
+    verbatim: bool,
+    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 = if verbatim {
+        name.to_string()
+    } else {
+        format!("{}{}{}", sess.target.staticlib_prefix, name, sess.target.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 ArchiveBuilderBuilder {
+    fn new_archive_builder<'a>(&self, sess: &'a Session) -> Box<dyn ArchiveBuilder<'a> + 'a>;
+
+    /// Creates a DLL Import Library <https://docs.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-creation#creating-an-import-library>.
+    /// and returns the path on disk to that import library.
+    /// This functions doesn't take `self` so that it can be called from
+    /// `linker_with_args`, which is specialized on `ArchiveBuilder` but
+    /// doesn't take or create an instance of that type.
+    fn create_dll_import_lib(
+        &self,
+        sess: &Session,
+        lib_name: &str,
+        dll_imports: &[DllImport],
+        tmpdir: &Path,
+    ) -> PathBuf;
+}
+
+pub trait ArchiveBuilder<'a> {
+    fn add_file(&mut self, path: &Path);
+
+    fn add_archive(
+        &mut self,
+        archive: &Path,
+        skip: Box<dyn FnMut(&str) -> bool + 'static>,
+    ) -> io::Result<()>;
+
+    fn build(self: Box<Self>, output: &Path) -> bool;
+}