--- old/src/jdk.jextract/share/classes/com/sun/tools/jextract/Context.java	2018-10-11 18:38:35.000000000 +0530
+++ new/src/jdk.jextract/share/classes/com/sun/tools/jextract/Context.java	2018-10-11 18:38:32.000000000 +0530
@@ -385,6 +385,7 @@
          // check for function symbols in libraries & warn missing symbols
          if (tree instanceof FunctionTree && !isSymbolFound(name)) {
              err.println(Main.format("warn.symbol.not.found", name));
+             return false; // do not generate functions for missing symbols
          }
 
          return true;
--- old/test/jdk/com/sun/tools/jextract/JtregJextract.java	2018-10-11 18:38:38.000000000 +0530
+++ new/test/jdk/com/sun/tools/jextract/JtregJextract.java	2018-10-11 18:38:37.000000000 +0530
@@ -24,6 +24,8 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.spi.ToolProvider;
 
 public class JtregJextract {
@@ -48,13 +50,15 @@
     }
 
     protected String[] processArgs(String... args) {
+        Pattern sysPropPattern = Pattern.compile("'?\\$\\((.*)\\)'?");
         ArrayList<String> jextrOpts = new ArrayList<>();
 
         jextrOpts.clear();
         jextrOpts.add("-I");
         jextrOpts.add(inputDir.toAbsolutePath().toString());
         jextrOpts.add("-d");
-        jextrOpts.add( outputDir.toAbsolutePath().toString());
+        jextrOpts.add(outputDir.toAbsolutePath().toString());
+
 
         int i = 0;
         while (i < args.length) {
@@ -69,7 +73,14 @@
                 continue;
             }
 
-            jextrOpts.add(opt);
+            // Pattern $(system.property.name) is replaced with the
+            // value of the System property of that name.
+            Matcher m = sysPropPattern.matcher(opt);
+            if (m.matches()) {
+                jextrOpts.add(System.getProperty(m.group(1)));
+            } else {
+                jextrOpts.add(opt);
+            }
         }
 
         while (i < args.length) {
--- /dev/null	2018-10-11 18:38:42.000000000 +0530
+++ new/test/jdk/com/sun/tools/jextract/missing/MissingSymbolTest.java	2018-10-11 18:38:40.000000000 +0530
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.foreign.Libraries;
+import java.foreign.Library;
+import java.lang.invoke.MethodHandles;
+import java.lang.reflect.Method;
+import org.testng.annotations.Test;
+import test.jextract.missing.missing;
+
+import static org.testng.Assert.assertTrue;
+import static test.jextract.missing.missing.*;
+
+/*
+ * @test
+ * @library ..
+ * @run driver JtregJextract -l Missing -L $(test.nativepath) -t test.jextract.missing -- missing.h
+ * @run testng MissingSymbolTest
+ */
+public class MissingSymbolTest {
+    @Test
+    public void testBind() {
+        // make sure that we can bind even though "cube" method is missing!
+        Library lib = Libraries.loadLibrary(MethodHandles.lookup(), "Missing");
+        missing libMissing = Libraries.bind(missing.class, lib);
+
+        // make sure cube method is not present
+        boolean noCubeMethod = false;
+        try {
+            Method cube = missing.class.getMethod("cube", int.class);
+        } catch (NoSuchMethodException nsme) {
+            System.err.println(nsme);
+            noCubeMethod = true;
+        }
+        assertTrue(noCubeMethod);
+    }
+}
--- /dev/null	2018-10-11 18:38:46.000000000 +0530
+++ new/test/jdk/com/sun/tools/jextract/missing/libMissing.c	2018-10-11 18:38:44.000000000 +0530
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+int square(int x) {
+    return x*x;
+}
--- /dev/null	2018-10-11 18:38:49.000000000 +0530
+++ new/test/jdk/com/sun/tools/jextract/missing/missing.h	2018-10-11 18:38:47.000000000 +0530
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+int square(int x);
+int cube(int x);