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Message-ID: <39865B2A.1D3A0FCA@ece.gatech.edu>
Date: Tue, 01 Aug 2000 01:07:54 -0400
From: Charles Wilson <cwilson AT ece DOT gatech DOT edu>
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To: cygwin-announce AT sourceware DOT cygnus DOT com
Subject: New on sources.redhat.com: jpeg-6b-2
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This is the intial port to cygwin's new packaging scheme of the
Independent JPEG Group's libjpeg library. 

Please read this message in its entirety. A list of changes/notes
concerning this package appear below.

The location of this package, in /cygwin/contrib rather than
/cygwin/latest should not affect most users; for now, packages in the
contrib directory are treated exactly as if they were in the latest
directory. In the future, setup.exe may have the ability to mark certain
packages -- especially those in contrib -- as optional. 

To update your installation, click on the "Install Cygwin now" link on
the http://sources.redhat.com/cygwin web page. This downloads setup.exe
to your system.

Run setup and answer all of the questions.  PLEASE, PLEASE, PLEASE
choose a mirror site for your download.  The 'sources.redhat.com' site
is badly overloaded.  The mirrors below have the latest version of this
package:

ftp://ftp.sunsite.utk.edu/pub/cygwin/ (US)
ftp://gd.tuwien.ac.at/gnu/cygwin/ (Austria)
http://programming.ccp14.ac.uk/ftp-mirror/programming/cygwin/pub/cygwin/
   (UK)

Note that if this is the first time that you've run the new GUI version
of setup, it will currently download the whole cygwin net release again.
After this point it will only download what is needed.

If you have questions or comments, please send them to the Cygwin
mailing list at:  cygwin AT sources DOT redhat 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 general.

If you want to make a point or ask a question the Cygwin mailing list is
the appropriate place.

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NOTES:

o Building the package from source requires gcc-2.95.2-2 and
binutils-20000722-1 or later

o I've had jpeg-6b on cygutils for some time, but the cygutils version
was staticlib only, and didn't follow the official cygwin package layout
rules.

o The semi-official 'lossless jpeg' patch is included in this build, and
is distributed as part of the source archive (see below). The lossless
jpeg patch is NOT related to the not-yet-ratified JPEG2000
specification. JPEG2000 is NOT supported by this package.

o Includes several utilities for manipulating jpeg files. The binary
package includes dynamically linked versions of these utilities,
although the build process will make both dynamically and statically
linked versions.  

o Abides by the cygwin package system standard:
  - import-lib   /usr/lib/libjpeg.dll.a
  - static-lib   /usr/lib/libjpeg.a
  - stripped dll /usr/bin/libjpeg.dll
  - cygwin-specific docs in /usr/doc/Cygwin/jpeg-6b.README
  - generic docs in /usr/doc/jpeg-6b/*

o If you have installed or plan to install the usr-local package from
cygutils, read this note:
http://cygutils.netpedia.net/V1.1/index.html#note1
  
o A cygwin-specific README and PATCH are stored in the source archive,
under <top>/CYGWIN-PATCHES/*. The original ljpeg-6b.tar.gz (lossless
jpeg patch) is also stored under <top>/CYGWIN-PATCHES/*. Both patches
have already been applied to the archive itself. The cygwin-specific
README is also installed by the binary distribution as described above.

o If you are building a package that depends on libjpeg, and you wish to
link *statically*, define -DJPEG_STATIC to get the 'correct' #define's
in jpeg.h (& friends) when compiling the .o files in your package. Also,
use 'gcc -static' when linking your package.

o No special -Ddefine options or link options are needed when building a
package that depends on libjpeg and you want to link dynamically
(recommended).


Charles Wilson
jpeg volunteer maintainer for cygwin