yorick-z: zlib, jpeg and png support for the Yorick language

[paumard]

Hi,

again a Yorick plug-in (zlib, png and jpeg compression).

Depends on submitted yorick port.

T.

[paumard]

Removed "revision" and took care of building with the right instance of yorick.

[ryandesign (Ryan Carsten Schmidt)]

On my Mac (with Snow Leopard) the configure script finds zlib but not png or jpeg:

================ begin yorick-z configuration ====================

updated ./Makefile
Using /opt/local/lib/yorick/Make.cfg
CC=/usr/bin/gcc-4.2
CFLAGS=-arch x86_64
LDFLAGS=-L/opt/local/lib -arch x86_64
zlib: found
  ZLIB_INC=-I/opt/local/lib
  ZLIB_LIB=-L/opt/local/lib -lz
WARNING: --png=/opt/local/lib DID NOT WORK, IS IT BUILT?
png: not found
WARNING: --jpeg=/opt/local/lib DID NOT WORK, IS IT BUILT?
jpeg: not found

================ yorick-z configuration completed ================

These yorick configuration scripts are really peculiar. They want us to point these arguments at a "directory containing png.h and libpng.a (uninstalled)". We don't have such a directory. We have installed directories, where png.h is in ${prefix}/include and libpng.a is in ${prefix}/lib. These configure scripts may need some surgery before they'll function sensibly.

[ryandesign (Ryan Carsten Schmidt)]

The README claims we can set environment variables like ZLIB_INC and ZLIB_LIB instead of passing configure arguments like --zlib=, but this appears to be a lie (does not work).

The easiest fix I found was to replace the hardcoded list of paths in the configure script (/sw and /usr/local) with the MacPorts prefix.

Committed the port in r67911 with these changes:

• fixed detection of libpng and libjpeg
• disabled universal variant
• some whitespace and formatting changes

I trust there was a good reason why we are building from CVS instead of the latest stable version of this software?