X-Spam-Check-By: sourceware.org Message-ID: <45801D69.8050204@cygwin.com> Date: Wed, 13 Dec 2006 10:34:01 -0500 From: "Larry Hall (Cygwin)" Reply-To: cygwin@cygwin.com User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061108 Fedora/1.5.0.8-1.fc4.remi Thunderbird/1.5.0.8 Mnenhy/0.7.4.0 MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: libraries References: <195b3f1f0612130010r1ff74342sfc4a699380ee873d@mail.gmail.com> In-Reply-To: <195b3f1f0612130010r1ff74342sfc4a699380ee873d@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Id: 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 Wynfield Henman wrote: > I have managed to confuse myself regarding libraries under cygwin, > after reading extensively on building dlls under cygwin..... > > Please check if my understanding is correct. > (1) For simple static libraries ld's output is fine. > Because only cygwin code will access it. > > (2) Does this follow with *nix shared library format? (if only used by > cygwin programs which > emulate *nix (does it also know about shared library objects)? > > (3) The ms-dll shared library format is only necessary if we want > ms-programs to be able to > use the program. > There's no incompatibility of object format between Cygwin static libs and those created by the MS compiler. Ditto for DLLs. There is no such thing as shared libraries in the traditional UNIX sense on Windows. The only "incompatibilities" between Cygwin built libs/DLLs and MS's are: 1. References to C++ in libs/DLLs built in one won't be resolved in the other (this is true when mixing and matching C++ object code from any compiler). This is not a problem for C code. 2. Calling Cygwin compiled code from a native executable needs some extra steps to make sure that the Cygwin C-runtime initialization code gets called. The reverse situation is not generally a problem. -- Larry Hall http://www.rfk.com RFK Partners, Inc. (508) 893-9779 - RFK Office 216 Dalton Rd. (508) 893-9889 - FAX Holliston, MA 01746 -- 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/