Mailing-List: contact cygwin-announce-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-announce-owner AT cygwin DOT com Delivered-To: mailing list cygwin-announce AT cygwin DOT com Delivered-To: moderator for cygwin-announce AT cygwin DOT com Message-ID: <3CEDA971.80805@ece.gatech.edu> Date: Thu, 23 May 2002 22:46:09 -0400 From: Charles Wilson User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.4) Gecko/20011019 Netscape6/6.2 X-Accept-Language: en-us MIME-Version: 1.0 To: cygwin-announce AT cygwin DOT com Subject: Updated: libpng-1.2.3-1; New: libpng12-1.2.3-1 and libpng12-devel-1.2.3-1 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit The libpng package has been updated to version 1.2.3-1. This includes the new packages libpng12 (1.2.3-1) libpng12-devel (1.2.3-1) which complement the existing libpng10 (1.0.13-3) libpng10-devel (1.0.13-3) in addition to simply updating the 'libpng' package from 1.0.13-3 to 1.2.3-1. libpng is a library that provides routines to access and manipulate Portable Network Graphics (PNG) images. PNG is a lossless, patent-unencumbered image format intended to replace GIF. CHANGES (since 1.0.13-3): - update to the 1.2.3 release. - this package replaces the libpng-1.0.13 package -- however, the LIBRARIES from 'libpng10-1.0.13-3' can coexist with the LIBRARIES from 'libpng12-1.2.3-1'. Ditto libpng10-devel and libpng12-devel. I've deliberately structured these packages so that the libraries and header files can coexist, and you can install both. But there is only one 'libpng' package -- the most recent one. (Don't sweat it. There's nothing in it except documentation) - Note that IF you want to link your application against this newest version of libpng, you may need to change your application's source code. Or, you can simply use -I/usr/include/libpng10/ and -lpng10 and continue linking against the 1.0.x series. However, all new development is happening on 1.2.x. - Aside: there are a few packages that depend on cygpng2.dll (that is, on the libpng2 package). libpng2 can be installed alongside these three packages, but new compiles will link against cygpng10.dll. Package maintainers should remember to update their setup.hints when recompiling dependent packages, to reflect the (future) new dependence on the libpng10 package. -- Charles Wilson libpng volunteer maintainer for cygwin INSTALLATION: To update your installation, click on the "Install Cygwin now" link on the http://cygwin.com/ web page. This downloads setup.exe to your system. Then, run setup and update the libpng package -- and also install the new libpng2 package. Note that we have recently stopped downloads from sources.redhat.com (aka cygwin.com) due to bandwidth limitations. This means that you will need to find a mirror which has this update. In the US, ftp://mirrors.rcn.net/mirrors/sources.redhat.com/cygwin/ is a reliable high bandwidth connection. In the UK, http://programming.ccp14.ac.uk/ftp-mirror/programming/cygwin/pub/cygwin/ is usually up-to-date within 48 hours. If one of the above doesn't have the latest version of this package then you can either wait for the site to be updated or find another mirror. If you have questions or comments, please send them to the Cygwin mailing list at: cygwin AT cygwin DOT com . I would appreciate if you would use this mailing list rather than emailing me directly. This includes ideas and comments about the setup utility or Cygwin in general. If you want to make a point or ask a question, the Cygwin mailing list is the appropriate place. *** CYGWIN-ANNOUNCE UNSUBSCRIBE INFO *** If you want to unsubscribe from the cygwin-announce mailing list, look at the "List-Unsubscribe: " tag in the email header of this message. Send email to the address specified there. It will be in the format: cygwin-announce-unsubscribe-you=yourdomain DOT com AT cygwin DOT com NOTES: In order to facilitate peaceful coexistence, the upstream libpng folks made a few changes. Now, you can use -I/usr/include/libpng10 -lpng10 to explicitly link against 1.0.x, or you can use -I/usr/include/libpng12 -lpng12 to explicitly link against 1.2.x Also, they recommend symlinks so that -I/usr/include/libpng -lpng will link against the newest version of libpng installed on the system. They also decided to scrap the [cyg|lib]png2.dll, 3.dll, sequence, instead, going with , so 1.0.x is now cygpng10.dll -- ditto for the import libs and static libs, as well as moving the header files into versioned subdirs of /usr/include/, although symbolic links to those header files are put directly into /usr/include.. So, we have: (in the 1.0.x series) dynamic lib: cygpng10.dll import lib: libpng10.dll.a static lib: libpng10.a include files: /usr/include/libpng10/* (in the 1.2.x series) dynamic lib: cygpng12.dll import lib: libpng12.dll.a static lib: libpng12.a include files: /usr/include/libpng12/* The symlinks I mentioned earlier: in /usr/lib: libpng.dll.a --> libpng12.dll.a in /usr/lib: libpng.a --> libpng12.a in /usr/include: libpng --> libpng12/ in /usr/include: png.h --> libpng12/png.h in /usr/include: pngconf.h --> libpng12/pngconf.h in /usr/lib/pkgconfig: libpng.pc --> libpng12.pc in /usr/bin: libpng-config --> libpng12-config I've implemented this symlink creation as part of the postinstall script.