Calling JVM from cygwin

[Pasch, Thomas (ACTGRO)]

Some time ago, Ignasi Villagrasa wrote:

> [...]
> I built following .bat file: 
> gcc -c invoke.c -Id:\jdk1.3.1\include -Id:\jdk1.3.1\include\win32 DLLTOOL
--dllname jvm.dll --def libjvm.def \
> --output-lib d:\jdk1.3.1\jre\bin\classic\libjvm.a c++ -o invoke.exe
invoke.o -Ld:\jdk1.3.1\jre\bin\classic -ljvm 
>
> with libjvm.def : 
>
> EXPORTS 
> _imp__JNI_GetDefaultJavaVMInitArgs@4 
> _imp__JNI_CreateJavaVM@12 
>
> All seems to work fine, and invoke.exe is generated. But when trying to
run it, I get a windows message telling me : invoke.exe 
> doesn't find the entry point to _imp__JNI_CreateJavaVM@12 in jvm.dll. 
> [...]

Hello, 

you are right, there seems to be problem in invoking java from cygwin
(the other way round works all right). It seem that mingw is doing a 
better job here. 

Perhaps http://www-106.ibm.com/developerworks/java/library/j-jnidebug/
is interesting for all. Code examples are included here as well. I can't 
get invocation.zip to work under cygwin. It compiles all right, but
invoking main.exe will lead to a Segmentation fault.

Anyway, your *def file is wrong. Should be something like:

EXPORTS
JNI_CreateJavaVM
JNI_GetCreatedJavaVMs
JNI_GetDefaultJavaVMInitArgs

Kind regards,

Thomas


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/