add test case for mixed language link tests

test cases/unit/97 compiler.links file arg/meson.build

@@ -0,0 +1,11 @@
+project('test', ['c', 'cpp'])
+
+cc = meson.get_compiler('c')
+cxx = meson.get_compiler('cpp')
+
+# used by run_unittests.py to grab the path to the C and C++ compilers
+assert(cc.compiles(files('test.c')))
+assert(cxx.compiles(files('test.c')))
+
+assert(cc.links(files('test.c')))
+assert(cxx.links(files('test.c')))

test cases/unit/97 compiler.links file arg/test.c

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

unittests/allplatformstests.py

@@ -1924,6 +1924,20 @@ class AllPlatformTests(BasePlatformTests):
                'recommended as it is not supported on some platforms')
         self.assertIn(msg, out)
 
+    def test_mixed_language_linker_check(self):
+        testdir = os.path.join(self.unit_test_dir, '97 compiler.links file arg')
+        self.init(testdir)
+        cmds = self.get_meson_log_compiler_checks()
+        self.assertEqual(len(cmds), 5)
+        # Path to the compilers, gleaned from cc.compiles tests
+        cc = cmds[0][0]
+        cxx = cmds[1][0]
+        # cc.links
+        self.assertEqual(cmds[2][0], cc)
+        # cxx.links with C source
+        self.assertEqual(cmds[3][0], cc)
+        self.assertEqual(cmds[4][0], cxx)
+
     def test_ndebug_if_release_disabled(self):
         testdir = os.path.join(self.unit_test_dir, '28 ndebug if-release')
         self.init(testdir, extra_args=['--buildtype=release', '-Db_ndebug=if-release'])