Re: [Savannah-hackers-public] Unable to run GUI application using cross-compiled jamvm for arm

[Bob Proulx]

Hello Aditya,

aditya sen wrote:
> Hello everyone,
> 
> First of all I apologize for this direct message. I went through the
> website https://savannah.gnu.org/ and only found this address where I can
> post my query. I am sorru if I posted at the wrong place. Below is the
> description of the problem we are facing.

You have reached the mailing list for people who hack on Savannah.
Savannah is the software forge for people committed to free software.
The web site, the version control hosting, that type of thing.

But you are asking about GNU Classpath.  We don't know too much
about specific projects here.  It would be better to look at the
project and see what it says about where to get help.

Looking at the Savannah web page here I see this list of mailing lists
for the Classpath project.

  https://savannah.gnu.org/mail/?group=classpath

I suggest starting off by sending your request to the
address@hidden mailing list as a general good place to start asking
questions about your problem.

Good luck!
Bob


> We have cross-compiled the gnu classpath 0.98 and jamvm 1.5_4 for our arm
> xscale device. When we run helloworld program, it works perfectly fine. But
> when we run gui applications, there is no response. Below are our commands
> which we gave for cross-compiling:
> 
> GNU CLASSPATH:
> ./configure --host=arm-xscale-linux-gnueabi  --prefix=/usr/local
> --disable-examples --with-x --disable-qt-peer --disable-gtk-peer
> --disable-gconf-peer --disable-plugin --enable-alsa --disable-dssi
> --with-escher=/home/warrior/java-project/escher-0.3/src
> --enable-local-sockets --enable-collections --enable-xmlj --disable-Werror
>  --enable-tools  --enable-default-toolkit=gnu.java.awt.peer.x.XToolkit
> 
> make
> 
> make install
> 
> JAMVM:
> 
> ./configure --host arm-xscale-linux-gnueabi --prefix=/usr/local
> --with-classpath-install-dir=/usr/local –enable-ffi
> 
> make
> 
> make install
> 
> We then transfer the required files to our device.
> 
> 
> we run our programs as
> 
> jamvm helloworld
> 
> jamvm -verbose Button
> 
> helloworld runs perfectly fine and gives the desired output in proper time.
> But when we run any gui sample we receive following error:
> 
> Exception in thread "main" java.lang.ExceptionInInitializerError
>    at gnu.java.awt.peer.x.XToolkit.getClasspathFontPeer(XToolkit.java:208)
>    at java.awt.Font.getPeerFromToolkit(Font.java:329)
> ...
> Caused by: java.lang.NullPointerException
>    at java.io.InputStreamReader.<init>(InputStreamReader.java:208)
>    at java.util.Properties.load(Properties.java:380)
>    at gnu.java.awt.font.OpenTypeFontPeer.<clinit>(OpenTypeFontPeer.java:93)
>    at gnu.java.awt.peer.x.XToolkit.getClasspathFontPeer(XToolkit.java:208)
> 
> Can someone please guide us on this. This is becoming very critical.
> 
> Earlier we thought this to be jamvm issue, but on jamvm forums , it can out
> that we are missing something while cross-compiling gnu classpath.
> 
> It will be a great help if someone can direct us towards fixing this to see
> what we are missing to get the gui applications running with jamvm. We have
> made a small sample using java swing which creates a frame and 2 buttons
> over it.
> 
> Thanks in advance.
> Aditya