diff --git a/tools/aidl/aidl.cpp b/tools/aidl/aidl.cpp
index 92f5b64..fb4067a 100644
--- a/tools/aidl/aidl.cpp
+++ b/tools/aidl/aidl.cpp
@@ -575,12 +575,19 @@
 
 // ==========================================================
 void
-generate_dep_file(const Options& options)
+generate_dep_file(const Options& options, const document_item_type* items)
 {
-   /* we open the file in binary mode to ensure that the same output is
-    * generated on all platforms !!
-    */
-    FILE* to = fopen(options.depFileName.c_str(), "wb");
+    /* we open the file in binary mode to ensure that the same output is
+     * generated on all platforms !!
+     */
+    FILE* to = NULL;
+    if (options.autoDepFile) {
+        string fileName = options.outputFileName + ".d";
+        to = fopen(fileName.c_str(), "wb");
+    } else {
+        to = fopen(options.depFileName.c_str(), "wb");
+    }
+
     if (to == NULL) {
         return;
     }
@@ -591,7 +598,12 @@
         slash = "";
     }
 
-    fprintf(to, "%s: \\\n", options.outputFileName.c_str());
+    if (items->item_type == INTERFACE_TYPE) {
+        fprintf(to, "%s: \\\n", options.outputFileName.c_str());
+    } else {
+        // parcelable: there's no output file.
+        fprintf(to, " : \\\n");
+    }
     fprintf(to, "  %s %s\n", options.inputFileName.c_str(), slash);
 
     while (import) {
@@ -611,44 +623,60 @@
 
 // ==========================================================
 static string
-generate_outputFileName(const Options& options, const document_item_type* items)
+generate_outputFileName2(const Options& options, const buffer_type& name, const char* package)
 {
     string result;
 
-    // items has already been checked to have only one interface.
-    if (items->item_type == INTERFACE_TYPE) {
-        interface_type* type = (interface_type*)items;
+    // create the path to the destination folder based on the
+    // interface package name
+    result = options.outputBaseFolder;
+    result += OS_PATH_SEPARATOR;
 
-        // create the path to the destination folder based on the
-        // interface package name
-        result = options.outputBaseFolder;
-        result += OS_PATH_SEPARATOR;
-
-        string package = type->package;
-        size_t len = package.length();
-        for (size_t i=0; i<len; i++) {
-            if (package[i] == '.') {
-                package[i] = OS_PATH_SEPARATOR;
-            }
+    string packageStr = package;
+    size_t len = packageStr.length();
+    for (size_t i=0; i<len; i++) {
+        if (packageStr[i] == '.') {
+            packageStr[i] = OS_PATH_SEPARATOR;
         }
-
-        result += package;
-        
-        // add the filename by replacing the .aidl extension to .java
-        const char* p = strchr(type->name.data, '.');
-        len = p ? p-type->name.data : strlen(type->name.data);
-
-        result += OS_PATH_SEPARATOR;
-        result.append(type->name.data, len);
-        result += ".java";
     }
 
+    result += packageStr;
+
+    // add the filename by replacing the .aidl extension to .java
+    const char* p = strchr(name.data, '.');
+    len = p ? p-name.data : strlen(name.data);
+
+    result += OS_PATH_SEPARATOR;
+    result.append(name.data, len);
+    result += ".java";
+
     return result;
 }
 
 // ==========================================================
+static string
+generate_outputFileName(const Options& options, const document_item_type* items)
+{
+    // items has already been checked to have only one interface.
+    if (items->item_type == INTERFACE_TYPE) {
+        interface_type* type = (interface_type*)items;
+
+        return generate_outputFileName2(options, type->name, type->package);
+    } else if (items->item_type == PARCELABLE_TYPE) {
+        parcelable_type* type = (parcelable_type*)items;
+        return generate_outputFileName2(options, type->name, type->package);
+    }
+
+    // I don't think we can come here, but safer than returning NULL.
+    string result;
+    return result;
+}
+
+
+
+// ==========================================================
 static void
-check_outputFileName(const string& path) {
+check_outputFilePath(const string& path) {
     size_t len = path.length();
     for (size_t i=0; i<len ; i++) {
         if (path[i] == OS_PATH_SEPARATOR) {
@@ -756,7 +784,7 @@
 
 // ==========================================================
 static int
-compile_aidl(const Options& options)
+compile_aidl(Options& options)
 {
     int err = 0, N;
 
@@ -850,27 +878,30 @@
         return 1;
     }
 
+    // if needed, generate the outputFileName from the outputBaseFolder
+    if (options.outputFileName.length() == 0 &&
+            options.outputBaseFolder.length() > 0) {
+        options.outputFileName = generate_outputFileName(options, mainDoc);
+    }
+
+    // if we were asked to, generate a make dependency file
+    // unless it's a parcelable *and* it's supposed to fail on parcelable
+    if ((options.autoDepFile || options.depFileName != "") &&
+            !(onlyParcelable && options.failOnParcelable)) {
+        // make sure the folders of the output file all exists
+        check_outputFilePath(options.outputFileName);
+        generate_dep_file(options, mainDoc);
+    }
+
     // they didn't ask to fail on parcelables, so just exit quietly.
     if (onlyParcelable && !options.failOnParcelable) {
         return 0;
     }
 
-    // if we were asked to, generate a make dependency file
-    if (options.depFileName != "") {
-        generate_dep_file(options);
-    }
-
-    // if needed, generate the outputFileName from the outputBaseFolder
-    string outputFileName = options.outputFileName;
-    if (outputFileName.length() == 0 &&
-            options.outputBaseFolder.length() > 0) {
-        outputFileName = generate_outputFileName(options, mainDoc);
-    }
-    
     // make sure the folders of the output file all exists
-    check_outputFileName(outputFileName);
+    check_outputFilePath(options.outputFileName);
 
-    err = generate_java(outputFileName, options.inputFileName.c_str(),
+    err = generate_java(options.outputFileName, options.inputFileName.c_str(),
                         (interface_type*)mainDoc);
 
     return err;
diff --git a/tools/aidl/options.cpp b/tools/aidl/options.cpp
index 0aa7db2..7b2daeb 100644
--- a/tools/aidl/options.cpp
+++ b/tools/aidl/options.cpp
@@ -15,6 +15,7 @@
             "OPTIONS:\n"
             "   -I<DIR>    search path for import statements.\n"
             "   -d<FILE>   generate dependency file.\n"
+            "   -a         generate dependency file next to the output file with the name based on the input file.\n"
             "   -p<FILE>   file created by --preprocess to import.\n"
             "   -o<FOLDER> base output folder for generated files.\n"
             "   -b         fail when trying to compile a parcelable.\n"
@@ -49,6 +50,7 @@
 
     options->task = COMPILE_AIDL;
     options->failOnParcelable = false;
+    options->autoDepFile = false;
 
     // OPTIONS
     while (i < argc) {
@@ -73,6 +75,9 @@
                         return usage();
                     }
                 }
+                else if (s[1] == 'a') {
+                    options->autoDepFile = true;
+                }
                 else if (s[1] == 'p') {
                     if (len > 2) {
                         options->preprocessedFiles.push_back(s+2);
diff --git a/tools/aidl/options.h b/tools/aidl/options.h
index d88d988..387e37d 100644
--- a/tools/aidl/options.h
+++ b/tools/aidl/options.h
@@ -23,6 +23,7 @@
     string outputFileName;
     string outputBaseFolder;
     string depFileName;
+    bool autoDepFile;
 
     vector<string> filesToPreprocess;
 };