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Message-ID:	<96C14D00FA99D311A8D60008C791F36409826841@devwagwodx0009.wob.vw.de>
From:	"Pasch, Thomas (ACTGRO)" <extern DOT thomas DOT pasch AT volkswagen DOT de>
To:	"'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject:	Re: Symbol in DLL begin with _
Date:	Tue, 31 Jul 2001 12:37:36 +0200
MIME-Version:	1.0
X-Mailer:	Internet Mail Service (5.5.2653.19)

Hm,

I've managed it now. Documentation and the FAQ is a little unclear to me
(and not up to date either). Here's a bash script to do the job (for JNI
only, 
comment out the grep stuff for the more general case.

Kind regards,

Thomas

-----------------------------------
#!/bin/bash

# mkdll.sh LIBNAME OBJECTFILES
# LIBNAME: without extensions
# OBJECTFILES: *.o (with extensions)

if test $# -lt 2; then 
  echo "usage: mkdll.sh LIBNAME OBJECTS*"
  exit -1
fi
	
# additional libs to link with: here we are doing C++ stuff
export LIBS=-lstdc++
export LIBNAME=$1
shift

# based on a tip of Dmitry Timoshkov 
# zero, remove old dll
rm $LIBNAME.a $LIBNAME.dll $LIBNAME.def $LIBNAME.tmp 2>/dev/null
# first, get a EXPORT list
dlltool --add-stdcall-alias --export-all-symbols --output-def $LIBNAME.tmp
$*
# (JNI only): second, only let the 'Java_' symbols in
echo EXPORTS >$LIBNAME.def
grep "Java_" $LIBNAME.tmp >>$LIBNAME.def
# third, create the .dll
dllwrap -o $LIBNAME.dll $* $LIBS -k --def $LIBNAME.def \
    -Wl,--kill-at,--enable-stdcall-fixup
# forth, reorganize the .a lib
dlltool --kill-at --input-def $LIBNAME.def --output-lib lib$LIBNAME.a
# fifth, echo something helpful about the dependencies of the dll
cygcheck -rv $LIBNAME.dll


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