gnumake problem

Posted on 2002-04-09
Last Modified: 2010-03-31
Having trouble getting gnumake to work (my first time, usually use IDE)

There is a difference between the location of the class files generated by “make” and where “make clean” looks to rm files. When doing a “make clean”, the window will show

make[1]: Entering directory `G:/Dev/Java/JProjectName
rm -f G:\Dev\JProjectName/classes\com\aaa\bbb\main\*.class

This doesn’t correspond to the location of the class files, which are in, for example,

(The difference being /src/)
Which is “correct”? That is, does /src/ belong in the path of the class files?  I suspect it does, because the package declaration in the java files contains “src”
That being the case, what needs to be done to get “make clean” to use the correct path?

It also concerns me that there both \ and / in the some statements, but that may not be an issue.

Various info:

JAVA_DEV_ROOT = G:\Dev\Java\JProjectName
JAVA_HOME = C:\jdk1.3.1_01
IS_UNIX = null

Variable values when debugging main makefile

PACKAGE = (or,
(one would think this should be
PACKAGE_LOC = com/aaa/bbb/main (or com/aaa/bbb/foo2, com/aaa/bbb/foo3)
DESTINATION = G:\Dev\Java\JProjectName/classes
PACKAGE_DIR = G:\Dev\Java\JProjectName/classes/com\aaa\bbb\main (or…)

Directories in the root are:

/src/ contains packages:

Actual paths are:

The Project makefile (G:\Dev\Java\JProjectName\makefile) is:
JBBB = \
     jprojectname.jar \
MAIN_CLASS     = JProjectName
MAIN_JAR       = JProjectName.jar

A package makefile (e.g. G:\Dev\Java\JprojectName\src\com\aaa\bbb\main\makefile) looks like:

SOURCE  = \ \
include $(JAVA_DEV_ROOT)/Makefile

Example package declaration in a java file:

Another symptom:

When doing a "make run" I get a NoClassDefFoundError

G:\Dev\Java\ JProjectName >make run
c:\jdk1.3.1_01/bin/java -classpath c:\jdk1.3.1_01/jre/lib/rt.jar;;G:\Dev\Java\ JProjectName /classes;G:\Dev\Java\ JProjectName/jars/jprojectname.jar; JProjectName \

Exception in thread "main" java.lang.NoClassDefFoundError: com/aaa/bbb/main/ JProjectName
make: *** [run] Error 1

Question by:jdaues
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions

Accepted Solution

Igor Bazarny earned 100 total points
ID: 6928825
I guess you either need to change PACKAGES value and something not shown here in your build script--it decides to put src between JAVA_DEV_ROOT and package directory, or don't start your package with src. Second option looks right to me, by naming convention your package name should start with your company domain name in reversed order, I doubt it's

Generally, your project structure looks OK, when package name doesn't start with src. src/com/aaa/bbb/ compiles to classes/com/aaa/bbb/File.class. You have separate directory for sources (src) and package structure below it and directory for compiled classes (classes) with same structure below

Igor Bazarny,
Brainbench MVP for Java 1

Author Comment

ID: 6929456
Originally, I didn't have "src" in the package names, but in hacking at it to get it to work I added it, though it didn't feel right.  So I have removed it on your advice.

I am compiling the project both with gnumake and with an IDE (Eclipse) and this turned out to be the issue because I had root directory the same (G:\Dev\Java\JProjectName) for them, when in fact they should be different.  For gnumake, the root should be G:\Dev\Java\JProjectName and for Eclipse it should be G:\Dev\Java\JProjectName\src  

So now all is well, thanks.

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Java had always been an easily readable and understandable language.  Some relatively recent changes in the language seem to be changing this pretty fast, and anyone that had not seen any Java code for the last 5 years will possibly have issues unde…
Viewers will learn one way to get user input in Java. Introduce the Scanner object: Declare the variable that stores the user input: An example prompting the user for input: Methods you need to invoke in order to properly get  user input:
This video teaches viewers about errors in exception handling.
Suggested Courses

710 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question