RE: GCJ RMI, does it work on Windows?

["Rui Wang" <Rui dot Wang at newcastle dot ac dot uk>]

I have solved most of my problems by now. Although the RMI server is
still not working. 

>From my experience, the correct version GCC binary seems to be
important. 
Previous problems are caused by gcj 3.4.* from MinGW. So if you wanna
use GCJ on windows, I would strongly suggest that go the following
website and download the GCC 4.*
http://www.thisiscool.com/gcc_mingw.htm

Thanks 
Rui 

 

>-----Original Message-----
>From: java-owner@gcc.gnu.org [mailto:java-owner@gcc.gnu.org] 
>On Behalf Of Rui Wang
>Sent: 05 November 2005 14:49
>To: java@gcc.gnu.org
>Subject: GCJ RMI, does it work on Windows?
>
>Judging from this archives, I seem to be the only one having 
>problems on compiling RMI under gcj on Windows. 
>Ok, I admit I am new to GCJ. But I have a very simple wish in my mind:
>testing GCJ on a helloworld-based RMI code. My code is a 
>client that calls a getSum(int x, int y) method on a server, 
>it is running fine on Sun JVM. 
>
>I'm using windows XP, with the following packages:
>	- MinGW-4.1.0 (gcj 3.4.2 comes with it) on my C drive.
>	- libiconv-1.8.1 
>
>I then set system path point to C:\MinGW\bin, and add 
>C:\MinGW\lib to system classpath. Everything is running fine. 
>GCJ is capable of compiling some sample java code. 
>
>The problem came when I was trying to run the rmiregistry from 
>gcj. A error was thrown out:
>
>WARNING: could not properly read security provider files:
>         file:///mingw/lib/security/libgcj.security
>         file:///mingw/lib/security/classpath.security
>         Falling back to standard GNU security provider
>java.rmi.RemoteException: failed to export: class 
>gnu.java.rmi.dgc.DGCImpl
>   at 0x00418d4e (Unknown Source)
>   at 0x00419242 (Unknown Source)
>   at 0x004436f4 (Unknown Source)
>
>I checked mingw/lib/security directory, both security files 
>are there and the registry seems still running. I don't really 
>know what cause the problem? Do I need to configure mingw to 
>run gcj properly? 
>
>Another problem is found when I was trying to generate 
>stub/skeleton using GCJ's rmic. I notice -classpath flag is 
>ignored at this moment.
>Therefore, I used the following batch file to do the job:
>
>::set CLASSPATH=.;%cd%\bin;
>grmic -vcompat RMIServerImpl.class
>
>A "java.lang.ClassNotFoundException: RMIServerImpl.class not 
>found exception" is thrown out. I did try a few other 
>approaches by calling grmic in the same directory of the class 
>file, or using Sun rmic to generate stub/skeleton files then 
>use it with gcj compiled files. But they all fall short.
>
>One final question, how to make use of policy file in RMI 
>setting with GCJ RMI? The file I am currently using is: 
>Policy.all
>grant {
>    permission java.security.AllPermission; }; 
>
>if anyone out there is using GCJ RMI on windows successfully 
>and wouldn't mind to helping me figure this out, I would much 
>appreciate your effort, since I am stacked by these problem 
>for three days. 
>
>Regards
>Rui 
>