Natively compiled SWT segfaults under Windows

[Olivier Parisy]

Hi,

I've successfully built a gcj toolchain under Windows/MinGW using 
rmathew's excellent instructions at :
http://www.rmathew.com/articles/gcj/bldgcj.html

My setup :
binutils-2.16.1.tar.bz2
gcc-4.2-20060805.tar.bz2
mingw-runtime-3.10.tar.gz
w32api-3.7.tar.gz

Compiling and running an helloworld does work.

I was also able to compile and link basic SWT code, but it dies silently 
at run time.

Executing it under GDB, I got:
Program received signal SIGSEGV, Segmentation fault.
fallback_backtrace(_Unwind_Reason_Code (*)(_Unwind_Context*, void*), 
_Jv_UnwindState*) (
    trace_fn=0xbcd700 <_Jv_StackTrace::UnwindTraceFn(_Unwind_Context*, 
void*)>, state=0x23f2cc) at ./sysdep/backtrace.h:
86
86      ./sysdep/backtrace.h: No such file or directory.
        in ./sysdep/backtrace.h

I am kind of stuck. It seems like this backtrace.h file has been 
discussed recently:
http://gcc.gnu.org/ml/java-patches/2006-q3/msg00101.html

but this doesn't look like the same issue.

Here is a simple test case to reproduce this bug (this runs fine using 
ecj/eclipse). The code dies during the Display instantiation:

import org.eclipse.swt.widgets.Display;

public class TestSWT {
    public static void main(String[] args) {
        try {
            System.out.println("Setting up display...");
            Display display = new Display();
            System.out.println("Display set up");
        } catch (Throwable t) {
            t.printStackTrace(System.out);
        }
        System.out.println("Done");
    }
}

And I compile it this way (which is painfully slow BTW):
gcj -g 
--classpath=src;build;lib/org.eclipse.swt.win32.win32.x86_3.2.0.v3232g.jar 
-c src\TestSWT.java -o build\TestSWT.o
gcj -fjni lib/org.eclipse.swt.win32.win32.x86_3.2.0.v3232g.jar -g -o 
build\app.exe --main=TestSWT build\TestSWT.o

Note that the SWT dll is in my PATH; if not, the application dies with 
the usual UnsatisfiedLinkError.

Any hint? Is this problem already solved by patches I may apply?

Best regards,
Olivier Parisy.