Added test for link path ordering

Author: inrustwetrust

src/test/run-make/link-path-order/Makefile

@@ -0,0 +1,17 @@
+-include ../tools.mk
+
+# Verifies that the -L arguments given to the linker is in the same order
+# as the -L arguments on the rustc command line.
+
+CORRECT_DIR=$(TMPDIR)/correct
+WRONG_DIR=$(TMPDIR)/wrong
+
+all: $(TMPDIR)/libcorrect.a $(TMPDIR)/libwrong.a
+	mkdir -p $(CORRECT_DIR) $(WRONG_DIR)
+	mv $(TMPDIR)/libcorrect.a $(CORRECT_DIR)/libfoo.a
+	mv $(TMPDIR)/libwrong.a $(WRONG_DIR)/libfoo.a
+	$(RUSTC) main.rs -o $(TMPDIR)/should_succeed -L $(CORRECT_DIR) -L $(WRONG_DIR)
+	$(call RUN,should_succeed)
+	$(RUSTC) main.rs -o $(TMPDIR)/should_fail -L $(WRONG_DIR) -L $(CORRECT_DIR)
+	$(call FAIL,should_fail)
+

src/test/run-make/link-path-order/correct.c

@@ -0,0 +1 @@
+int should_return_one() { return 1; }

src/test/run-make/link-path-order/main.rs

@@ -0,0 +1,26 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate libc;
+
+#[link(name="foo")]
+extern {
+    fn should_return_one() -> libc::c_int;
+}
+
+fn main() {
+    let result = unsafe {
+        should_return_one()
+    };
+
+    if result != 1 {
+        std::os::set_exit_status(255);
+    }
+}

src/test/run-make/link-path-order/wrong.c

@@ -0,0 +1 @@
+int should_return_one() { return 0; }