[vtkusers] Compilation problem with java
Simon J.Rees
sjrees at okstate.edu
Tue Jun 13 09:30:42 EDT 2000
David,
Just to add to what Dan said, I beleive javac also checks dates of files
in a similar way to 'make'. In other words if you change one java file and
do: javac -d {class_path} {vtk_home}/java/vtk/*.java, only the file that
changed gets recompiled. It is not therefore necessary to specify
dependancies in the make file.
Also I agree with Dan that some of this stuff should be in a FAQ ( I also
had to find out the hard way)
-simon
> David,
>
> Actually, you do not have to manually compile anything! javac, unlike
> CC resolves dependancies by itself, IF javac knows where you have already
> compiled the classes. Setting CLASSPATH or adding a -classpath flag to
> javac tells javac how to resolve dependancies.
>
> If you try to compile things by hand as they crop up as errors, you'll
> be at it a _long_ time (I know, I've tried).
>
> -dan
>
> On Tue, 13 Jun 2000, David D. Marshall wrote:
>
> > I don't think this is the problem. The problem is that the java classes
are not compiled in the
> > correct order. The vtkProp.java file has not been compiled yet the
Makefile is trying to
> > compile the vtkActor2D class which inherits from vtkProp. So until the
Makefiles are fixed to
> > compile in the correct order, a new person has to manually compile the
classes by hand. What
> > worked for me was: javac -d {class_path} {vtk_home}/java/vtk/*.java.
Once you have the java
> > classes compiled in the {class_path} directory, then you can use the
Makefiles.
> >
> > Slightly off topic but equally annoying is the fact the there are no
dependencies in the
> > Makefiles for the java compilation, so everytime you need to make the
java libraries it will
> > re-make all of the the java classes. But since I'm not doing anything
about it, I guess I
> > should just shut up :).
> >
> > Hope this helps.
> >
> > "Daniel J. Blezek, Ph.D." wrote:
> >
> > > Hi all,
> > >
> > > This should be a FAQ...
> > >
> > > javac will do the right thing if you tell it where to look for
already
> > > compiled classes. The easiest way (and a bit of a hack) is to make
your
> > > user.make have a line like this:
> > >
> > > JAVA_CLASS_HOME= <path to java classes> -classpath <path to java
classes>
> > >
> > > This tells javac to look in the same place for already compiled
classes.
> > > In the same way you can set the CLASSPATH environment variable to
include
> > > the place where you are putting the compiled classes:
> > > (/scratch0/NOT_BACKED_UP/ucacdxa/TCLTk/VTKJavaClasses in the example
> > > below).
> > >
> > > -dan
> > >
> > > On Tue, 13 Jun 2000, Suman Datta wrote:
> > >
> > > > hi all,
> > > > my problem is exactly the same ... not able to
> > > > compile vtk on solaris ... somebody please advise how
> > > > to solve this problem ...
> > > >
> > > > regards,
> > > > suman datta.
> > > >
> > > >
> > > > --- Olivier Coulon <o.coulon at cs.ucl.ac.uk> wrote:
> > > > > Dear vtk users,
> > > > >
> > > > > I'm trying to compile vtk3.1 on Solaris2.7 using the
> > > > > --with-java option
> > > > > and I get an error as soon as the compilation of the
> > > > > java classes
> > > > > starts. it seems that the compiler cannot find the
> > > > > vtkProp class while
> > > > > compiling vtkActor2D, which is weird because the two
> > > > > files are in the
> > > > > same directory.
> > > > > Somebody has an idea what goes wrong ?
> > > > >
> > > > > - Olivier
> > > > >
> > > > >
> > > > > Here is the messages I get:
> > > > >
> > > > > rm -f ../java/vtk/vtkObjectFactoryCollection.java;
> > > > >
> > > > /scratch0/NOT_BACKED_UP/ucacdxa/TCLTk/vtk31/wrap/vtkParseJava
> > > > > ../vtkObjectFactoryCollection.h ./../wrap/hints 1 >
> > > > > .../java/vtk/vtkObjectFactoryCollection.java
> > > > > Parsed func New
> > > > > Parsed func AddItem
> > > > > Parsed func GetNextItem
> > > > > Parsed func vtkObjectFactoryCollection
> > > > > Parsed func vtkObjectFactoryCollection
> > > > > Parsed func vtkObjectFactoryCollection
> > > > > Converted operator
> > > > > Parsed func AddItem
> > > > > /opt/ucl/bin/javac -sourcepath
> > > > > /scratch0/NOT_BACKED_UP/ucacdxa/TCLTk/vtk31/java/vtk
> > > > > -d
> > > > > /scratch0/NOT_BACKED_UP/ucacdxa/TCLTk/VTKJavaClasses
> > > > > .../java/vtk/vtkActor2D.java
> > > > > .../java/vtk/vtkActor2D.java:7: Superclass
> > > > > vtk.vtkProp of class
> > > > > vtk.vtkActor2D not found.
> > > > > public class vtkActor2D extends vtkProp
> > > > > ^
> > > > > 1 error
> > > > > make[1]: *** [../java/vtk/vtkActor2D.class] Error 1
> > > > > make[1]: Leaving directory
> > > > > `/scratch0/NOT_BACKED_UP/ucacdxa/TCLTk/vtk31/common'
> > > > > make: *** [build_common] Error 2
> > > > >
> > > > >
> > > > > > begin:vcard
> > > > > n:Coulon;Olivier
> > > > > tel;fax:+44 (0)20 7387 1387
> > > > > tel;work:+44 (0)20 7679 3702
> > > > > x-mozilla-html:TRUE
> > > > > url:http://www.cs.ucl.ac.uk/staff/O.Coulon
> > > > > org:University College London;Computer Sciences
> > > > > adr:;;Gower Street;London;;WC1E 6BT;United-Kingdom
> > > > > version:2.1
> > > > > email;internet:O.Coulon at cs.ucl.ac.uk
> > > > > title:PhD
> > > > > x-mozilla-cpt:;27200
> > > > > fn:Olivier Coulon
> > > > > end:vcard
> > > > >
> > > >
> > > >
> > > > __________________________________________________
> > > > Do You Yahoo!?
> > > > Yahoo! Photos -- now, 100 FREE prints!
> > > > http://photos.yahoo.com
> > > >
> > > > _______________________________________________
> > > > This is the private VTK discussion list.
> > > > Please keep messages on-topic. Check the FAQ at:
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> > > >
> > >
> > > --
> > > Daniel Blezek, Ph.D.
> > > blezek at crd.ge.com
> > > Computer Graphics and Systems Program
> > > Electronic Systems Lab
> > > GE Corporate Research & Development
> > >
> > > _______________________________________________
> > > This is the private VTK discussion list.
> > > Please keep messages on-topic. Check the FAQ at:
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> >
> > --
> > David D. Marshall
> > ARTLab System Administrator/GRA
> > Georgia Institute of Technology, Atlanta Georgia, 30332
> > http://www.ae.gatech.edu/research/artlab/artl/artlab.html
> > mailto:gte552m at prism.gatech.edu
> > think: Why anonymity is good
http://www.cato.org/pubs/briefs/bp-054es.html
> >
> >
>
> --
> Daniel Blezek, Ph.D.
> blezek at crd.ge.com
> Computer Graphics and Systems Program
> Electronic Systems Lab
> GE Corporate Research & Development
>
>
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