X-Recipient: archive-cygwin AT delorie DOT com
X-Spam-Check-By: sourceware.org
Date: Tue, 17 Mar 2009 18:27:21 -0400
From: Christopher Faylor <cgf-use-the-mailinglist-please AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: under cygwin, zsh cannot run when built against ncurses9-5.7-13
Message-ID: <20090317222721.GB1505@ednor.casa.cgf.cx>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
References: <20a807210903131414g62e0a53cyefd3938c3fe8af33 AT mail DOT gmail DOT com> <49BADAC1 DOT 80709 AT cwilson DOT fastmail DOT fm> <gpf7kk$2g6$1 AT ger DOT gmane DOT org> <gpfcdo$a30$1 AT ger DOT gmane DOT org> <gpgeu9$iuo$1 AT ger DOT gmane DOT org> <Pine DOT LNX DOT 4 DOT 64 DOT 0903142203230 DOT 9859 AT gremlin DOT fruitbat DOT org> <49BF1770 DOT 9020007 AT gmail DOT com> <49C00B83 DOT 8050302 AT gmail DOT com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <49C00B83.8050302@gmail.com>
User-Agent: Mutt/1.5.16 (2007-06-09)
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Id: <cygwin.cygwin.com>
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On Tue, Mar 17, 2009 at 08:43:47PM +0000, Dave Korn wrote:
>Dave Korn wrote:
>
>>   Anyway, I found that removing "-lm -lc" from the options fixes the build
>> problem, and that it makes no difference what version of ld you use.  
>
>  Have looked at this a little further.
>
>  First off: the Cygwin C runtime library is basically the Cygwin DLL, and
>what we want in normal use is to link against the Cygwin DLL's import library,
>(which is /usr/lib/libcygwin.a).
>
>  The libraries /usr/lib/libm.a and /usr/lib/libc.a are helper libraries, used
>to bundle up objects as part of the winsup build.  They are passed to the
>final link that builds the Cygwin DLL.  They appear to be some kind of import
>library that has been processed by a perl script called speclib that does some
>kind of low-level binary munging on them to change symbol names:
>
>-libcygwin/d000078.o:     file format pe-i386
>+libc/d000078.o:     file format pe-i386
>-[  7](sec  0)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __head_cygwin1_dll
>+[  7](sec  0)(fl 0x00)(ty   0)(scl   2) (nx 0) 0x00000000 __head_libc
>
>  I don't know what it's all about yet, but as far as I can tell, they aren't
>suitable for use outside the actual build system itself and should probably
>not need to be installed.  It would probably be better if they were replaced
>by symlinks to libcygwin.a, as is done for libg.a.

Sheesh.  Do you honestly think I would have gone to the effort of
creating these libraries when a simple symlink would suffice?  Do you
really think I don't know about symlinks?

cgf

--
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/