From: Glen_Fullmer-EGF002 AT email DOT mot DOT com (Glen Fullmer-EGF002)
Subject: Re: .reloc section in EXE
20 Oct 1998 07:57:22 -0700
Message-ID: <199810191506.KAA18500.cygnus.gnu-win32@emerald.ccrl.mot.com>
References: <9810190347 DOT AA15494 AT modi DOT xraylith DOT wisc DOT edu>
To: gnu-win32 AT cygnus DOT com
Cc: khan AT xraylith DOT wisc DOT edu

Howdy,

>>>> "MK" == Mumit Khan <khan AT xraylith DOT wisc DOT edu> writes:

   MK> For help on creating relocatable DLLs, see my dllhelpers package at
   MK> http://www.xraylith.wisc.edu/~khan/software/gnu-win32/. Colin Peters
   MK> has a nice intro on creating dlls as well on his web page (follow
   MK> the link from my "Related Sites" area).

Q#1: Gcc, Java, and dlls.  Using Mumit's recommendations and others I was
     able to create a dll with all my JNI calls and nm confirms that they are
     there. However when I try to open the DLL from Java I get:

     Error: error: java.lang.UnsatisfiedLinkError: no libjtoc in shared
     library path

     I do have the directory in which libjtoc.dll resides in the PATH
     environment variable.

     On the Sun and HP one deletes the 'lib' prefix to the libjtoc. I
     have tried it both ways on the PC - both failing similarly.

     Java code snippet looks like:

         String libname = "libjtoc";
	     try {
	           System.loadLibrary(libname);
		 } catch (UnsatisfiedLinkError Err) {
		   gutil.errorMsg("error: " + Err);
                   return;
	     }

     Suggestions to fix this?

Q#2: When trying to link a couple of other static libraries into the dll for
     which I don't have source I get a number of compile error messages 
     complaining about:

           undefined reference to "_imp__<some function>"

     Where <some function> includes:

           free
	   fprintf
	   printf
	   malloc
	   strncpy
	   etc....

     What could be causing this?  The libraries include C and C++ code.

Q#3: I assume that Java JNI requires a relocatable DLL.  Is that correct?

Any help on any of these questions would be appreciated.

Thanks,
-- 
Glen Fullmer,(847)538-3082, Mail: <gfullmer AT ccrl DOT mot DOT com>,
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