Add a unit test to ensure object file order

Part of the changes to make input and output filenames in targets be
deterministic.

run_unittests.py

@@ -136,5 +136,16 @@ class LinuxlikeTests(unittest.TestCase):
         self.assertTrue('-Werror' in vala_command)
         self.assertTrue('-Werror' in c_command)
 
+    def test_static_compile_order(self):
+        testdir = os.path.join(self.common_test_dir, '5 linkstatic')
+        self.init(testdir)
+        compdb = self.get_compdb()
+        # Rules will get written out in this order
+        self.assertTrue(compdb[0]['file'].endswith("libfile.c"))
+        self.assertTrue(compdb[1]['file'].endswith("libfile2.c"))
+        self.assertTrue(compdb[2]['file'].endswith("libfile3.c"))
+        self.assertTrue(compdb[3]['file'].endswith("libfile4.c"))
+        # FIXME: We don't have access to the linker command
+
 if __name__ == '__main__':
     unittest.main()

test cases/common/5 linkstatic/libfile2.c

@@ -0,0 +1,3 @@
+int func2() {
+    return 2;
+}

test cases/common/5 linkstatic/libfile3.c

@@ -0,0 +1,3 @@
+int func3() {
+    return 3;
+}

test cases/common/5 linkstatic/libfile4.c

@@ -0,0 +1,3 @@
+int func4() {
+    return 4;
+}

test cases/common/5 linkstatic/meson.build

@@ -1,6 +1,6 @@
 project('static library linking test', 'c')
 
-lib = build_target('mylib', 'libfile.c', target_type : 'static_library')
+lib = build_target('mylib', 'libfile.c', 'libfile2.c', 'libfile3.c', 'libfile4.c', target_type : 'static_library')
 exe = executable('prog', 'main.c', link_with : lib)
 
 test('runtest', exe)