Eclipse Source Builds (Source from Zip)

Table of Contents

  1. What is an Eclipse source build?
  2. Getting the source
  3. Building Eclipse using Ant
  4. Setting the bootclasspath
  5. Supported build platforms
  6. Known limitations


What is an Eclipse Source Build?

Eclipse source builds provide developers with an automated method for compiling the Java code, generating javadoc, and finally, creating a zip file of an Eclipse runtime from a downloaded source tree. The end result of a source build is a runnable Eclipse.


Getting the Source

This source build download contains all the Java code, non-Java resources, and scripts that build a particular version of Eclipse. Although you can manually edit build.xml files in each feature and plug-in, they are typically generated by the Eclipse pde-build plug-in. As a result you will need to download a fresh source build zip file when major changes occur to Eclipse source, such as the addition or removal of plug-ins. The version of Eclipse a particular source build will create is embedded in the source build zip file name. For example, builds Eclipse version 3.0


Building Eclipse using Ant and a JDK


Produces an Eclipse SDK using the Java compiler you have installed.

System Requirements

  1. Ant 1.6.1 or higher
  2. JDK 1.4
  3. Info-Zip zip and unzip executables on system path.
  4. 600 meg free disk space
  5. Source build zip from

Initial Setup

Install Ant and a JDK as per each program's instructions. Minimally you will need the following environment variables set.
  1. Add the Ant bin directory to your path.
  2. Set the JAVA_HOME environment variable to the root of your JDK installation.
  3. Set the ANT_HOME environment variable to the root of your Ant installation.
  4. (Windows 98) Increase the default environment space as specified here.

Run the Build

  1. Extract the eclipse-sourceBuild-srcIncluded-*.zip to an empty directory.
  2. cd to the directory.
  3. Execute build -os <osType> -ws <windowSystemType> -arch <architecture> [-bc <bootclasspath>] [-target <target>]

      Parameter NameDescription
      osTypeTarget operating system (See supported types).
      windowSystemTypeTarget windowing system (See supported types).
      architectureTarget system archecture (See supported types).
      bootclasspath (optional)The list of bootclasspath jars to compile against using either a colon or semi-colon as separators. The jars that make up a bootclasspath are part of any JDK or JRE. Typically this parameter is only specified if you are cross compiling Eclipse or using a JDK which does not use a "rt.jar" to contain the java libraries. The default is the rt.jar on your path.
      target (optional)

      The Ant target from build.xml to execute. The default target is run and performs a complete build and generates an install. Other valid targets are:

      • compile (compiles Java code and generates javadoc)
      • clean
      • install

Install Eclipse

When the Eclipse build is complete, there will be a zip file called


in the results subdirectory of your build directory.

Extract this file to the directory where you would like to run Eclipse. If you extract it to your root directory, a directory called eclipse will be created.

Run Eclipse with the desired command line parameters.

Supported Platforms

Eclipse can be built on any of the following platforms. With some limitations any platform can be used to build Eclipse for any or all supported platforms.

Operating System (os)Windowing System (ws)Architecture(arch)




Known Limitations

  1. Building unix flavours of Eclipse on Windows will result in incorrect file permissions. The *.so, *.sl, and Eclipse executable files will not have execute permissions. In addition, linux-motif and linux-gtk builds will not have soft links to in the installation root directory. In these cases you would have to write an install or post install script to set permissions properly. (UNIX builds built on UNIX systems will set sufficient permissions and make the appropriate soft links).
  2. Only Java source code is compiled. *.dll, *so, *sl and Eclipse executables are all provided prebuilt in this build process. The linux, gtk, ppc configuration will require a re-compilation of the eclipse executable and swt libaries and copying these files to the apppropriate directories.