Re: [Swig-devel] patches #253

[William S F. <ws...@fu...>]

On 12/09/13 15:06, Mathieu Malaterre wrote:
> Hi,
>
>    Let's assume for a minute that I am trying to work on patches#253
> (Add wrapping for std::set in Java).
>
>    Here is what I did:
>
> [clone git from github]
> $ ./autogen.sh
> $ ./configure --without-tcl --without-perl5 --without-python
> --without-ruby --without-octave --without-php
> --with-java=/usr/bin/java  --with-javac=/usr/bin/javac
> --without-chicken --with-javaincl=$JAVA_HOME/include
> $ make
> $ (cd Examples/java/class && make && env LD_LIBRARY_PATH=. java main)
>
> As per reading:
> http://www.dabeaz.com/cgi-bin/wiki.pl?DeveloperInfo/GettingStarted
>

Fairly recently, this got more automated and those pages need updating 
now for the examples.

> However it fails with:
>
> g++ -c -fpic    example.cxx example_wrap.cxx
> -I"/usr/lib/jvm/default-java/include"
> -I"/usr/lib/jvm/default-java/include"
> g++ -shared    example.o example_wrap.o    -o libexample.so
> make[1]: Leaving directory `/home/mathieu/Projects/swig/Examples/java/class'
> javac *.java
> Exception in thread "main" java.lang.NoClassDefFoundError: main
> Caused by: java.lang.ClassNotFoundException: main
> at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
> at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:334)
> Could not find the main class: main. Program will exit.
>
>
I can't really see anything wrong with that, other than javac might not 
be as you configured '/usr/bin/javac'. Likewise with /usr/bin/java. The 
versions given during configure are now used in the latest, try now 
instead with:

$ (cd Examples/java/class && make check)
make -f ../../Makefile CXXSRCS='example.cxx' SWIG='../../../preinst-swig' \
	SWIGOPT='' TARGET='example' INTERFACE='example.i' java_cpp
make[1]: Entering directory 
`/home/william/swig/github/swig/Examples/java/class'
../../../preinst-swig -java -c++  example.i
g++ -c -fpic -I/usr/include    example.cxx example_wrap.cxx 
-I"/usr/lib/jvm/java-1.6.0-openjdk/include" 
-I"/usr/lib/jvm/java-1.6.0-openjdk/include/linux"
g++ -shared  -I/usr/include   example.o example_wrap.o    -o libexample.so
make[1]: Leaving directory 
`/home/william/swig/github/swig/Examples/java/class'
make -f ../../Makefile JAVASRCS='*.java' JAVAFLAGS='' java_compile
make[1]: Entering directory 
`/home/william/swig/github/swig/Examples/java/class'
javac  *.java
make[1]: Leaving directory 
`/home/william/swig/github/swig/Examples/java/class'
make -f ../../Makefile java_run
make[1]: Entering directory 
`/home/william/swig/github/swig/Examples/java/class'
env LD_LIBRARY_PATH=.  /usr/bin/java runme
Creating some objects:
     Created circle Circle@1f33675
     Created square Square@7c6768

A total of 2 shapes were created

Here is their current position:
     Circle = (20.0 30.0)
     Square = (-10.0 5.0)

Here are some properties of the shapes:
    Circle@1f33675
         area      = 314.1592653589793
         perimeter = 62.83185307179586
    Square@7c6768
         area      = 100.0
         perimeter = 40.0

Guess I'll clean up now
0 shapes remain
Goodbye
make[1]: Leaving directory 
`/home/william/swig/github/swig/Examples/java/class'


> Is there any documentation for dev to get up to speed quickly ? For
> instance how does one run one test-case in particular, let's call it
> Examples/test-suite/java/li_std_set_runme.java ?
>

See http://www.swig.org/Doc2.0/Extending.html#Extending_test_suite for 
writing tests. Most of the testing is done on Ubuntu, so you really 
shouldn't struggle on Debian.

William