java - Makefile 找不到其他类(Java、Linux、Ubuntu)

Question

我正在尝试为我的类(class)创建一个 makefile，但它看起来像makefile 看不到或找不到我的类，尽管它们在同一个文件夹。

它在我运行 javac 时有效，但在我运行 makefile 时无效。

生成文件

JAVAC=/usr/bin/javac
dir=src/myrepo

.SUFFIXES: .java .class

.java.class:

        $(JAVAC) -cp . $< 

default: $(dir)/*.class 

clean: 
        if [ -e $(dir)/*.java~ ] ; then rm $(dir)/*.java~; fi 
        mv $(dir)/*.class bin; fi

目录是Assignment/Makefile，Assignment/src/myrepo(myrepo中的所有类)

类是 PrintIt.java、BinarySearchTree.java、BinaryTree.java、Record.java(所有在我的仓库中)

错误:

/usr/bin/javac -cp . src/myrepo/BinarySearchTree.java 
src/myrepo/BinarySearchTree.java:3: error: cannot find symbol
public class BinarySearchTree extends BinaryTree {
                                      ^
  symbol: class BinaryTree
src/myrepo/BinarySearchTree.java:9: error: cannot find symbol
        public void insert ( Record d ){
                             ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:16: error: cannot find symbol
        public void insert ( Record d, BinaryTreeNode<Record> node ){
                             ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:16: error: cannot find symbol
        public void insert ( Record d, BinaryTreeNode<Record> node ){
                                       ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:16: error: cannot find symbol
        public void insert ( Record d, BinaryTreeNode<Record> node ){
                                                      ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:30: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d ){
                                             ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:30: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d ){
               ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:30: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d ){
                              ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:37: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d, BinaryTreeNode<Record> node ){
                                             ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:37: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d, BinaryTreeNode<Record> node ){
                                                       ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:37: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d, BinaryTreeNode<Record> node ){
                                                                      ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:37: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d, BinaryTreeNode<Record> node ){
               ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:37: error: cannot find symbol
        public BinaryTreeNode<Record> find ( Record d, BinaryTreeNode<Record> node ){
                              ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:47: error: cannot find symbol
        public void delete ( Record d ){
                             ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:51: error: cannot find symbol
        public BinaryTreeNode<Record> delete ( Record d, BinaryTreeNode<Record> node ){
                                               ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:51: error: cannot find symbol
        public BinaryTreeNode<Record> delete ( Record d, BinaryTreeNode<Record> node ){
                                                         ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:51: error: cannot find symbol
        public BinaryTreeNode<Record> delete ( Record d, BinaryTreeNode<Record> node ){
                                                                        ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:51: error: cannot find symbol
        public BinaryTreeNode<Record> delete ( Record d, BinaryTreeNode<Record> node ){
               ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:51: error: cannot find symbol
        public BinaryTreeNode<Record> delete ( Record d, BinaryTreeNode<Record> node ){
                              ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:70: error: cannot find symbol
        public BinaryTreeNode<Record> findMin ( BinaryTreeNode<Record> node ){
                                                ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:70: error: cannot find symbol
        public BinaryTreeNode<Record> findMin ( BinaryTreeNode<Record> node ){
                                                               ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:70: error: cannot find symbol
        public BinaryTreeNode<Record> findMin ( BinaryTreeNode<Record> node ){
               ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:70: error: cannot find symbol
        public BinaryTreeNode<Record> findMin ( BinaryTreeNode<Record> node ){
                              ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:77: error: cannot find symbol
        public BinaryTreeNode<Record> removeMin ( BinaryTreeNode<Record> node ){
                                                  ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:77: error: cannot find symbol
        public BinaryTreeNode<Record> removeMin ( BinaryTreeNode<Record> node ){
                                                                 ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:77: error: cannot find symbol
        public BinaryTreeNode<Record> removeMin ( BinaryTreeNode<Record> node ){
               ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:77: error: cannot find symbol
        public BinaryTreeNode<Record> removeMin ( BinaryTreeNode<Record> node ){
                              ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:10: error: cannot find symbol
            if (root == null)
                ^
  symbol:   variable root
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:11: error: cannot find symbol
                root = new BinaryTreeNode<Record> (d, null, null);
                ^
  symbol:   variable root
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:11: error: cannot find symbol
                root = new BinaryTreeNode<Record> (d, null, null);
                           ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:11: error: cannot find symbol
                root = new BinaryTreeNode<Record> (d, null, null);
                                          ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:13: error: cannot find symbol
                insert (d, root);
                           ^
  symbol:   variable root
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:19: error: cannot find symbol
                    node.left = new BinaryTreeNode<Record> (d, null, null);
                                    ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:19: error: cannot find symbol
                    node.left = new BinaryTreeNode<Record> (d, null, null);
                                                   ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:24: error: cannot find symbol
                        node.right = new BinaryTreeNode<Record> (d, null, null);
                                         ^
  symbol:   class BinaryTreeNode
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:24: error: cannot find symbol
                        node.right = new BinaryTreeNode<Record> (d, null, null);
                                                        ^
  symbol:   class Record
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:31: error: cannot find symbol
            if (root == null)
                ^
  symbol:   variable root
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:34: error: cannot find symbol
                return find (d, root);
                                ^
  symbol:   variable root
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:48: error: cannot find symbol
            root = delete (d, root);
            ^
  symbol:   variable root
  location: class BinarySearchTree
src/myrepo/BinarySearchTree.java:48: error: cannot find symbol
            root = delete (d, root);
                              ^
  symbol:   variable root
  location: class BinarySearchTree
40 errors
Makefile:12: recipe for target 'src/myrepo/*.class' failed
make: *** [src/myrepo/*.class] Error 1

Answer 1

找到解决方案:

# Assignment 1 makefile
# Hendri Vermeulen
# 29 March 2017

JAVAC=/usr/bin/javac
dir=src/myrepo

.SUFFIXES: .java .class

.java.class:
        $(JAVAC) -cp src/myrepo $< 

default: $(dir)/Record.class $(dir)/BinaryTree.class $(dir)/BinarySearchTree.cla

clean: 
        if [ -e $(dir)/*.java~ ] ; then rm $(dir)/*.java~; fi 
        mv $(dir)/*.class bin; fi

必须在编译命令中添加“-cp src/myrepo”，这是我的类路径的目录。