Re: GCJ 4.1.1 and static linking - SEGV

[David Daney <ddaney at avtrex dot com>]

Thomas Aeby wrote:
> Hello,
>
> probably I am missing something obvious... I'm trying to build a static
> java program, let's say
>
>   public class test {
>     public static void main( String args[] ) {
>       System.err.println( "Hello" ); }}
>
> with 
>
>   gcj -g -static --main=test -Wl,--whole-archive -lnss_files_p -lnss_dns_p -lresolv -lpthread -ldl -Wl,--no-whole-archive test.java
>
> This works like expected up to GCJ 4.0.1 (probably also in 4.0.3, but haven't
> tested), when started the program prints "Hello" and exits.
>   

Static linking with libgcj is a bit tricky.  Perhaps the information on 
in the Wiki would be of use:

http://gcc.gnu.org/wiki/Statically_linking_libgcj

I have had problems with statically linking to libc, but if you are 
careful, static linking to libgcj with a dynamic libc seems to work well.

David Daney
> When trying with 4.1.1, I get
>
>   # ./a.out
>   Segmentation fault
>
> GDB stack trace tells me
>
>   (gdb) bt
>   #0  0x00000000 in ?? ()
>   #1  0x081e89de in pthread_create (new_thread=0x86c733c, attr=0xbffffa04,
>     start_routine=0x808fff0 <really_start>, arg=0x74ff8) at ../.././boehm-gc/pthread_support.c:1289
>   #2  0x0808fee7 in _Jv_ThreadStart (thread=0x5cb18, data=0x86c7338,
>     meth=0x808cd30 <_Jv_ThreadRun(java::lang::Thread*)>) at ../.././libjava/posix-threads.cc:488
>   #3  0x0808c702 in java::lang::Thread::start (this=0x5cb18)
>     at ../.././libjava/java/lang/natThread.cc:328
>   #4  0x080620e4 in _Jv_CreateJavaVM (vm_args=0x0) at ../.././libjava/prims.cc:1334
>   #5  0x080622da in _Jv_RunMain (vm_args=0x0, klass=0x8441fc0, name=0x0, argc=1, argv=0xbffffd84,
>     is_jar=false) at ../.././libjava/prims.cc:1355
>   #6  0x08062468 in _Jv_RunMain (klass=0x8441fc0, name=0x0, argc=1, argv=0xbffffd84, is_jar=false)
>     at ../.././libjava/prims.cc:1401
>   #7  0x0806249b in JvRunMain (klass=0x8441fc0, argc=1, argv=0xbffffd84)
>     at ../.././libjava/prims.cc:1407
>   #8  0x0804824c in main (argc=Cannot access memory at address 0x1
>   ) at /tmp/ccYuSF5L.i:11
>
> The problem persists wether I build gcc 4.1.1 with --disable-shared or not.
>
> Has anyone got a hint for me? Am I doing some silly mistake?
>
> Best regards,
> Tom
>