[Linker] Handle archive files

Add a class to parse archive files.
Support linking archive files, with archive semantics (i.e. an archive
member is linked in if it satisfies an undefined reference).
Archive files must be gnu-format archives containing .s files.
Add tests for linking semantics.

1 files changed, 10 insertions, 0 deletions

diff --git a/test/linker/main.c b/test/linker/main.c
new file mode 100644
index 000000000..d70bc7033
--- /dev/null
+++ b/test/linker/main.c
@@ -0,0 +1,10 @@
+int foo() {
+  return 42;
+}
+
+void bar();
+
+int main() {
+  foo();
+  bar();
+}