Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Message-ID: <412EC747.5050601@luukku.com> Date: Fri, 27 Aug 2004 08:31:51 +0300 From: Jani tiainen User-Agent: Mozilla Thunderbird 0.7.1 (Windows/20040626) MIME-Version: 1.0 To: Yu-Cheng Chou CC: Cygwin List Subject: Re: convert .lib to .a References: <200408270208.i7R28QMk005153@andrena.ucdavis.edu> In-Reply-To: <200408270208.i7R28QMk005153@andrena.ucdavis.edu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Yu-Cheng Chou wrote: > Hi, Larry: > > I have two c-callable static libs which are created by vc, but the source > codes are not available. > I need these libs to create a shared library using gcc under cygwin. > > Command line: > > gcc -shared -o libmpi.dl > mpi_chdl.o ../../src/lib/libmpi.a ../../src/lib/liblam.a ../../src/lib/chsd > k.lib ../../src/lib/ch.lib > > Error message: > > Warning: .drectve '/DEFAULTLIB:"MSVCRT" /DEFAULTLIB:"OLDNAMES" /EXPORT:___b > uiltin_Ch_VaArg ' unrecognized > Cannot export .idata$4: symbol not found > Cannot export .idata$5: symbol not found > Cannot export .idata$6: symbol not found > Cannot export .text: symbol not found > Cannot export ⌂ch_NULL_THUNK_DATA: symbol not found > collect2: ld returned 1 exit status > make: *** [libmpi.dl] Error 1 > > Have any idea to fix this problem? AFAIK, you can't do that in that way. First, you have to build shared library (DLL in terms of Windoze), with VC. Then you can export API calls to .def and create .a from there on. Well of course you can generate .def from VC compilation and then generate .a lib. But this applies only to shared libs. To my knowledge it's not possible to do this with static libs. -- Jani Tiainen -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/