https://issues.apache.org/bugzilla/show_bug.cgi?id=48066
Summary: ant.jar is needless in build.xml
Product: Tomcat 7
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: qingyang...@qunar.com
following is the relevant parts of the 'build.xml' file:
<path id="tomcat.classpath">
<pathelement location="${ant.jar}"/>
<pathelement location="${jdt.jar}"/>
</path>
... ...
<target name="compile">
<javac srcdir="java" destdir="${tomcat.classes}"
debug="${compile.debug}"
deprecation="${compile.deprecation}"
source="${compile.source}"
target="${compile.target}"
optimize="${compile.optimize}"
excludes="**/CVS/**,**/.svn/**"
encoding="ISO-8859-1">
<!-- Comment this in to show unchecked warnings: <compilerarg
value="-Xlint:unchecked"/> -->
<classpath refid="tomcat.classpath" />
<exclude name="org/apache/naming/factory/webservices/**" />
</javac>
... ...
</target>
However, if you delete the first item (<pathelement location="${ant.jar}"/>) in
the path element whose id is 'tomcat.classpath', the target of 'compile' still
runs successfully, and if you invoke ant as "ant -v", you can see that
'ant.jar' has already been included in the classpath. For example, the
following is the output on my machine:
... ...
Compiling 1052 source files to
/home/xuqy/Downloads/apache-tomcat-6.0.20-src/output/classes
[javac] Using modern compiler
[javac] Compilation arguments:
[javac] '-d'
[javac] '/home/xuqy/Downloads/apache-tomcat-6.0.20-src/output/classes'
[javac] '-classpath'
[javac]
'/home/xuqy/Downloads/apache-tomcat-6.0.20-src/output/classes:/home/xuqy/tomcat-base-path/eclipse/plugins/org.eclipse.jdt.core_3.3.1.v_780_R33x.jar:/usr/local/apache-ant-1.7.1/lib/ant-launcher.jar:/usr/local/apache-ant-1.7.1/lib/xercesImpl.jar:/usr/local/apache-ant-1.7.1/lib/ant-jdepend.jar:/usr/local/apache-ant-1.7.1/lib/ant-javamail.jar:/usr/local/apache-ant-1.7.1/lib/ant-commons-net.jar:/usr/local/apache-ant-1.7.1/lib/ant-apache-oro.jar:/usr/local/apache-ant-1.7.1/lib/ant.jar:/usr/local/apache-ant-1.7.1/lib/ant-weblogic.jar:/usr/local/apache-ant-1.7.1/lib/xml-apis.jar:/usr/local/apache-ant-1.7.1/lib/ant-jmf.jar:/usr/local/apache-ant-1.7.1/lib/ant-trax.jar:/usr/local/apache-ant-1.7.1/lib/ant-jsch.jar:/usr/local/apache-ant-1.7.1/lib/ant-commons-logging.jar:/usr/local/apache-ant-1.7.1/lib/ant-apache-regexp.jar:/usr/local/apache-ant-1.7.1/lib/ant-swing.jar:/usr/local/apache-ant-1.7.1/lib/ant-junit.jar:/usr/local/apache-ant-1.7.1/lib/ant-testutil.jar:/usr/local/apache-ant-1.7.1
/lib/ant-antlr.jar:/usr/local/apache-ant-1.7.1/lib/ant-jai.jar:/usr/local/apache-ant-1.7.1/lib/ant-nodeps.jar:/usr/local/apache-ant-1.7.1/lib/ant-apache-bsf.jar:/usr/local/apache-ant-1.7.1/lib/ant-apache-resolver.jar:/usr/local/apache-ant-1.7.1/lib/ant-netrexx.jar:/usr/local/apache-ant-1.7.1/lib/ant-starteam.jar:/usr/local/apache-ant-1.7.1/lib/ant-apache-log4j.jar:/usr/local/apache-ant-1.7.1/lib/ant-stylebook.jar:/usr/local/apache-ant-1.7.1/lib/ant-apache-bcel.jar:/usr/lib/jvm/java-6-sun-1.6.0.16/lib/tools.jar'
[javac] '-sourcepath'
[javac] '/home/xuqy/Downloads/apache-tomcat-6.0.20-src/java'
[javac] '-target'
[javac] '1.5'
[javac] '-g'
[javac] '-source'
[javac] '1.5'
It seems that Ant appends ant.jar automatically when invoking javac target. So,
removing ant.jar from classpath is safe. Furthermore, ant.jar is neither
alluded in build.xml.default nor in the file of 'BUILDING.txt'. In most cases,
it is discarded silently.
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