Re: Compiling of GCJ and SWT under MacOS X

[Andrew Haley <aph at redhat dot com>]

cyberdeth@spymac.com writes:

 > I have downloaded gnu gcc 3.4.3 and compiled it with the following command line  
 > parameters :    
 >  
 > configure --prefix=/usr --enable-languages=c,c++,java,f77,objc  
 > --enable-threads=posix --enable-shared    
 >  
 > make bootstrap    
 >  
 > make install    
 >  
 > Now this compiles everything fine under MacOS X.3 using the gcc compiler that  
 > comes with the Developer Tools ie. gcc 3.3   When I compile a Hello World 
 > program using gcj, like so :    
 >  
 > gcj Test.java -o Test --classpath /usr/share/java/libgcjxxx.jar:$CLASSPATH  
 > --main=Test -lgcj    

You should not do this.  If gcj is faliing to find libgcj.jar,
something is wrong.

 > Then it compiles fine and the output from the program is as
 > expected.
 >  
 > But. When I try to link against the libswt-carbon-xxxx.jnilib all
 > hell breaks loose. I have tried to make a symlink from *.jnilib to
 > *.dylib and even to .a. When I do a file on the jnilib it says it's
 > a bundle.

Where did this library come from?

 > I have tried to copy the jnilib files 
 > into /System/Library/Frameworks/JavaVM.framework/Libraries and linking the  
 > program as follows.    
 >  
 > gcj Test.java -o Test --classpath /usr/share/java/libgcjxxx.jar:$CLASSPATH  
 > --main=Test -lgcj -framework JavaVM    

Don't use "-lgcj".

 > which fails.    
 >  
 > When I do an ld style    
 >  
 > ld Test.o -o Test -lgcj -framework JavaVM then it gives me an error that no __main is  
 > found hence the --main=Test option.    
 >  
 > when doing a gcj Test.o -o Test -lgcj libswt-carbon-xxxx.jnilib it fails as well telling  
 > me that i can't call a static link editor using a dynamic link editor or something like  
 > this. And this is where I'm struggling with.    
 >  
 > I mean if I link against any other jnilib in the JavaVM framework it compiles  
 > correctly. Maybe the jnilibs shouldn't be bundles ???     
 >  
 > My long winded questions is :    
 >  
 > 1) Is my gcc configuration flags correct ?   

Yes.

Andrew.