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Date: 23 Jul 2001 11:15:25 -0000
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From: bugzilla@apache.org
To: ant-dev@jakarta.apache.org
Cc: 
Subject: [Bug 2736] New:  - Ant javac task has problems with dependencies
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=2736

*** shadow/2736	Mon Jul 23 04:15:24 2001
--- shadow/2736.tmp.2191	Mon Jul 23 04:15:24 2001
***************
*** 0 ****
--- 1,170 ----
+ +============================================================================+
+ | Ant javac task has problems with dependencies                              |
+ +----------------------------------------------------------------------------+
+ |        Bug #: 2736                        Product: Ant                     |
+ |       Status: NEW                         Version: Nightly build           |
+ |   Resolution:                            Platform: All                     |
+ |     Severity: Major                    OS/Version: All                     |
+ |     Priority: Other                     Component: Core tasks              |
+ +----------------------------------------------------------------------------+
+ |  Assigned To: ant-dev@jakarta.apache.org                                   |
+ |  Reported By: peter.van_der_goten@alcatel.be                               |
+ +----------------------------------------------------------------------------+
+ |          URL:                                                              |
+ +============================================================================+
+ |                              DESCRIPTION                                   |
+ This bug was found in Ant1.3 and
+ also found in the latest nightly build of ant (2001-07-22)
+ file: jakarta-ant-1.4alpha-bin.zip
+ I thid the tests on NT for the 1.4aplha release and found the
+ bug on unix for the 1.3 release.
+ 
+ In our project we noticed some problems with depencies concerning interfaces
+ used to specify constants.
+ It seemed that the constants are inlined in the .class files and these .class
+ files which use the contsants where NOT recompiled when a constant was changed.
+ 
+ To test this I made a simple application which uses two other .java files
+ in which only public final consts where defined in an interface.
+ (in the manner we use in our project)
+ 
+ The bug could be reproduced with ant but NOT with javac or jikes used on 
+ there own.
+ 
+ The build .xml file I used
+ <project name="CompTest" default="compile">
+ 
+   <property name="build.compiler" value="jikes"/>
+   <property name="package"        value="be/alcatel"/>
+   <property name="src"            value="${basedir}/Src"/>
+   <property name="logfile"        value="${basedir}/build.log"/>
+   <property name="classes"        value="${basedir}/Classes"/>
+   <property name="show"           value="true"/>
+ 
+   <!-- ******* -->
+   <!-- Compile -->
+   <!-- ******* -->
+   <target name="compile">
+     <javac srcdir="${src}"
+      destdir="${classes}"
+      classpath="${classpath}"
+      includes="${package}/**/*.java"
+      verbose="${show}"
+      failonerror="false"
+      depend="true"
+      debug="off" optimize="off" deprecation="off"/>
+   </target>
+ 
+ </project>
+ the java files:
+ //AnOtherTestConstsITF.java
+ package be.alcatel.another;
+ 
+ public interface AnOtherTestConstsITF{
+   public static final String const2 = "2";
+ }
+ //TestConstsITF
+ package be.alcatel.test;
+ 
+ public interface TestConstsITF{
+   public static final int const1 = 1;
+ }
+ //Test.java
+ package be.alcatel.test;
+ 
+ import be.alcatel.another.*;
+ 
+ public class Test implements TestConstsITF, AnOtherTestConstsITF{
+ 
+   public void printConsts(){
+     System.err.println("TestConstsITF.const1        = "+TestConstsITF.const1);
+     System.err.println("const1                      = "+const1);
+     System.err.println("AnOtherTestConstsITF.const2 = 
+ "+AnOtherTestConstsITF.const2);
+     System.err.println("const2                      = "+const2);
+   }
+ 
+   public static void main (String[] args){
+     Test t = new Test();
+     t.printConsts();
+   }
+ }
+ 
+ The project direcotory structure:
+ Projroot
+   Src
+     be
+       alcatel
+         test
+           Test.java
+           TestConstsITF.java
+         another
+           AnOtherTestConstsITF.java
+   Classes
+     be
+       alcatel
+         test
+           Test.class
+           TestConstsITF.class
+         another
+           AnOtherTestConstsITF.class
+   
+ Build.bat used to build this example
+ 
+ @echo off
+ @setlocal
+ set PSD_VOB=D:\Projects\comptest
+ set PF_TOOLS=F:\PFTools
+ 
+ set JAVA_HOME=%PF_TOOLS%\j2sdk1.3.1-win
+ set J2EE_HOME=%PF_TOOLS%\bea\wlserver6.0sp1
+ set BUILDFILE=D:\Projects\comptest\build.xml
+ 
+ rem set ANT_HOME=%PF_TOOLS%\jakarta-ant1.3
+ set ANT_HOME=D:\jakarta-ant-1.4alpha
+ 
+ set CPATH=%JAVA_HOME%\lib\tools.jar
+ set CPATH=%CPATH%;%J2EE_HOME%\lib\weblogic.jar
+ set CPATH=%CPATH%;%ANT_HOME%\lib\ant.jar
+ rem set CPATH=%CPATH%;%ANT_HOME%\lib\jakarta-ant-1.3-optional.jar
+ set CPATH=%CPATH%;%ANT_HOME%\lib\jakarta-ant-1.4alpha-optional.jar
+ set CPATH=%CPATH%;%ANT_HOME%\lib\parser.jar
+ set CPATH=%CPATH%;%ANT_HOME%\lib\crimson.jar
+ set CPATH=%CPATH%;%ANT_HOME%\lib\jaxp.jar
+ set CPATH=%CPATH%;%PF_VOB%\build\ant\lib\PFant.jar
+ 
+ %JAVA_HOME%\bin\java -classpath %CPATH% -Dant.home="%ANT_HOME%" 
+ org.apache.tools.ant.Main -buildfile %BUILDFILE% -Dbasedir=%PSD_VOB% 
+ -Dlibdir=tmp -Dtools=%PF_TOOLS% -quiet %1 %2 %3 %4 %5 %6 %7 %8 %9
+ 
+ @endlocal
+ 
+ When the project is rebuild using an adapted version of 
+ AnOtherTestConstsITF.java
+ The only class file that is new will be AnOtherTestConstsITF.class
+ Because the constats of this class where inlinde by the compiler in Test.class
+ the Test.class file should have been recompiled.
+ In fact this is done by the standard javac tool or jikes (without using ant)
+ 
+ If make.bat is used all is well (doesn't use ant)
+ @echo off
+ 
+ rem make.bat for the test
+ 
+ set PRJDIR=D:\Projects\comptest
+ set JDK_HOME=c:\jdk1.3.0_02\bin
+ set CLASSDIR=%PRJDIR%\Classes
+ set SRCDIR=%PRJDIR%\Src
+ set JARDIR=%PRJDIR%\jar
+ 
+ 
+ @echo compiling...
+ start /b /wait /d%PRJDIR% jikes -depend -sourcepath %SRCDIR% -classpath 
+ .;%CLASSDIR%;c:\jdk1.3.0_02\jre\lib\rt.jar -d %CLASSDIR% 
+ %SRCDIR%\be\alcatel\test\*.java
+ 
+ notice that i use -depend (but it will also work without it)
+ the depend flag was also used in the build.xml file (see above)
+ 
+ Best regards,
+ Peter Van der Goten