[Mingw-users] Ming linker problem: How to fix name of exported symbol?

[Wiedmann, J. <joc...@so...>]

Hi,

I have an external program (Java) into which I want
to embed a DLL created with Mingw. (More precise: A
JVMPI profiler.) The JVMPI contract assumes that I
have to offer a function JVM_OnLoad.

"objdump -p" shows, that I have an exported function

  JVM_OnLoad@12

but this doesn't seem accurately what the Java executable
wants.

I do build my DLL with the following commands:

  g++ -c -shared -o simpleprofiler.o -ID:\Prg\JDK-1.3.1\include \
	-ID:\Prg\JDK-1.3.1\include\win32 simpleprofiler.cc
  g++ -c -shared -o hashtable.o -ID:\Prg\JDK-1.3.1\include \
	-ID:\Prg\JDK-1.3.1\include\win32 hashtable.cc
  dllwrap --dllname=simpleprofiler.dll simpleprofiler.o hashtable.o

When I start my DLL with

  java -Xrunsimpleprofiler ...

I receive the message

  Could not find JVM_OnLoad function in -Xrun library: simpleprofiler


Any hints?


Regards,

Jochen