Re: [Plplot-general] newbie question

[Alan W. I. <ir...@be...>]

On 2004-05-17 21:41-0400 Ali Muhammad wrote:

> I am trying to build java binding on windows. The documentation provided
only talks about unix. I will appreciate it somebody can provide help.

I think building java binding on windows is possible since the java
interface C file and other essential java interface wrappers that are
generated by swig are all part of the tarball.  But as far as I know, a Java
interface to PLplot on windows has never been done before.  Also, I have no
windows expertise so you will have to infer what to do on the Windows side
from what is currently done on the Linux/Unix side of things which I will
now explain.

What is done with the tarball java files is pretty straightforward on
the Linux side so it shouldn't be that difficult to follow. In particular
our installation procedure creates the following tree in the install area.

./plplot/core/README.javaAPI
./plplot/core/PLStreamc.java
./plplot/core/config.java
./plplot/core/SWIGTYPE_p_p_char.java
./plplot/core/plplotjavac.java
./plplot/core/plplotjavacJNI.java
./plplot/core/plplotjavacConstants.java
./plplot/core/plplotjavac_wrap.so
./plplot/core/PLStreamc.class
./plplot/core/SWIGTYPE_p_p_char.class
./plplot/core/config.class
./plplot/core/plplotjavac.class
./plplot/core/plplotjavacConstants.class
./plplot/core/plplotjavacJNI.class
./plplot/examples/README.javademos
./plplot/examples/x01.java
./plplot/examples/x02.java
./plplot/examples/x03.java
./plplot/examples/x04.java
./plplot/examples/x05.java
./plplot/examples/x06.java
./plplot/examples/x07.java
./plplot/examples/x08.java
./plplot/examples/x09.java
./plplot/examples/x10.java
./plplot/examples/x11.java
./plplot/examples/x12.java
./plplot/examples/x13.java
./plplot/examples/x14.java
./plplot/examples/x15.java
./plplot/examples/x16.java
./plplot/examples/x17.java
./plplot/examples/x18.java
./plplot/examples/x19.java
./plplot/examples/x01.class
./plplot/examples/x02.class
./plplot/examples/x03.class
./plplot/examples/x04.class
./plplot/examples/x05.class
./plplot/examples/x06.class
./plplot/examples/x07.class
./plplot/examples/x08.class
./plplot/examples/x09.class
./plplot/examples/x10.class
./plplot/examples/x11.class
./plplot/examples/x12.class
./plplot/examples/x13.class
./plplot/examples/x14.class
./plplot/examples/x15.class
./plplot/examples/x16.class
./plplot/examples/x17.class
./plplot/examples/x18.class
./plplot/examples/x19.class

I assume you mostly know on the Windows side of thing how to create a
similar directory tree using the swig-generated java files from the tarball.
The only difficult file I am aware of is ./plplot/core/plplotjavac_wrap.so.
That is the actual wrapper library under Linux is created with the following
two commands under Linux on my system which happens to have a peculiar
location for java, hence all the strange -I options.

gcc -DHAVE_CONFIG_H -I. -I. -I../.. -I../../include -I../../include \
-I../../libltdl -I/home/software/java/IBMJava2-14/include \
-I/home/software/java/IBMJava2-14/include -g -O2 -mieee-fp -c \
plplotjavac_wrap.c -Wp,-MD,.deps/plplotjavac_wrap.TPlo  -fPIC -DPIC -o \
.libs/plplotjavac_wrap.o

gcc -shared  .libs/plplotjavac_wrap.o  -Wl,--rpath \
-Wl,/usr/local/plplot_at/lib \
-L/home/software/plplot_cvs/HEAD/plplot_devel/lib/nn/.libs \
-L/home/software/plplot_cvs/HEAD/plplot_devel/lib/csa/.libs -L/usr/lib/ \
-L/usr/local/plplot_at/lib -lplplotd -lm  -mieee-fp -Wl,-soname \
-Wl,plplotjavac_wrap.so -o .libs/plplotjavac_wrap.so

The first command compiles the tarball-supplied plplotjavac_wrap.c, and the
second command links the result into a shared object (I think you call that
a DLL on the windows side of things).

So you should be okay if you know how to compile and link on windows.  My
best guess for those steps is you should follow what is done to compile and
link libplplot itself on windows, and then install the result in the above
tree.  Then you will have to edit config.java.in from the tarball to point
to the correct absolute location of the shared object (or DLL?) you just installed.
For example, after Unix configuration (which puts the configured result from
config.java.in into config.java, my resulting config.java file has the
following line:

public static String libname = "/usr/local/plplot_at/lib/java/plplot/core/plplotjavac_wrap.so";

(My particular absolute installation prefix for the above plplot java
interface tree is /usr/local/plplot_at/lib/java so you will have to adjust
the line in your own config.java according to where you have installed the
above plplot tree containing the java interface.)

Finally, you will have to java compile all the *.java files in the above
tree that you copied from the tarball (or edited from config.java.in for the
config.java case).  But that should be straightforward so the only difficult
part is compiling and linking the shared object, and I hope I have given you
enough details on that so it should be straightforward for you.

Anyhow, good luck, and if you get the java interface to PLplot to work on
windows, please document what you did so we can add it to the windows
instructions for PLplot to make it easier for other windows users to follow
what you have done.

Alan
__________________________
Alan W. Irwin
email: ir...@be...
phone: 250-727-2902

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the PLplot scientific plotting software
package (plplot.org), the Yorick front-end to PLplot (yplot.sf.net), the
Loads of Linux Links project (loll.sf.net), and the Linux Brochure Project
(lbproject.sf.net).
__________________________

Linux-powered Science
__________________________