Viraj,
Before you go to a lot of trouble writing a long message, let me see if I
can clear things up a bit. The "depend" attribute of the <javac> task does
just one thing: When set to true (or yes or on), as in depend="true", it
will include the -depend flag on the compile command-line. What including
that flag on the compile command-line does is determined by the compiler
you're using. Personally, I never use it. In any case, it isn't used to
associate a dependency from the classfiles to the sourcefiles -- that's
done by the <javac> task itself. The <javac> task will find all the
specified .java files (or all .java files under "srcdir" if no files were
specified) and determine which need to be (re-)compiled, based on whether
a corresponding classfile exists and is newer than the source-file.
Hope this helps,
Diane
--- Viraj Purang <[EMAIL PROTECTED]> wrote:
> Hi Diane,
> I am in process of writing a long reply to you, explaning my problem
> and
> my understanding of the dependencies.
> But in short I just wanted to be sure that by merely quoting
> 1. the <javac task with the depend attribute
> 2. and a <depend> clause for the given directory
> ensure that there will be no redundant compilation of any
> source file and at the same time every new or changed source file inside
> the
> given directory would be compiled.
>
> I also need to know the exact syntax of the depend task particularly if
> I
> want it to run on all files in the given directory (I am assuminmg a
> syntax
> like <javac ....... depend="*.java").I have been going thru the sun
> documentation for that and it does not seem to be exhaustive on the
> issue.Even our ANT manuals say very little about the depend option in
> javac.
>
> Can you possibly direct me to an example where javac task with deopend
> option is being used in a build.xml file.
>
> Regards,
> Viraj Purang
>
>
> -----Original Message-----
> From: Diane Holt [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, June 12, 2001 2:26 PM
> To: [EMAIL PROTECTED]
> Subject: RE: Java Dependencies ...
>
>
> Viraj,
>
> I'm not savvy enough with Java yet to be certain I know what you're
> asking. Do you mean that externs.java never gets compiled into a
> classfile, but is used during the compile of your other source-files?
> (Something like a header-file in C?) And you want to recompile any file
> that uses externs.java whenever externs.java is newer?
>
> Diane
>
> --- Viraj Purang <[EMAIL PROTECTED]> wrote:
> > Hi,
> > I looked thru the examples ...what I probably need here is an
> > example
> > which contains an example of javac depend attribute.I know it is just
> > teh
> > opposite of the depend task as such.
> > BUt I need to know how cross dependencies between modules or
> > different
> > hierarchies are settled.I feel it is done using
> > javac compiler itself.
> >
> > Basically in standard practice, if I have a file called
> > com/spincircuit/entity/scp.java which instantiates an object from
> > com/spincircuit/common/externs.java(we only have a java file for it
> and
> > no
> > class file compiled for it .),
> > do we let javac take care of automatically searching this file in the
> > courcepaty and compiling it
> > or
> > do I have to specifically go and specify a depend attribute on the
> javac
> > task to do this ?
> >
> > In almost all the examples that I have seen anywhere on the net I do
> not
> > see
> > the depend attribute of javac being
> > used ie none of the dependencies are explicitly specified using any
> > target.Almost all files are compiled
> > in one or two java statements.
> >
> > CAn you direct me to a file base which contains some cross
> dependencies
> > ?
> >
> > Regards,
> > Viraj Purang
> >
> > -----Original Message-----
> > From: Diane Holt [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, April 26, 2001 11:50 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Java Dependencies ...
> >
> >
> > --- Viraj Purang <[EMAIL PROTECTED]> wrote:
> > > One more question that I have is ... is there a way by which, we can
> > > generate the dependency trees for Java files.
> >
> > See the Depend task description under Optional Tasks in the user
> manual.
> >
> > Diane
> >
> > =====
> > ([EMAIL PROTECTED])
> >
> >
> >
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