> On Nov 3, 2016, at 04:35, PHILLIP SMITH <smith...@mac.com> wrote:
> 
> I’m curious.  libpng recently updated from 1.6.25 to 1.6.26.  However, the 
> virtual package remained at 1.6.25
> 
> Not a big deal, obviously, but unexpected.
> 
> smithp01-MB-19> fink list png
> Information about 9894 packages read in 5 seconds.
>     bmp2png               1.62-3           BMP to PNG graphics file conversion
>     cran-png-r31          0.1-7-1          Read and write PNG images
>     cran-png-r32          0.1-7-1          Read and write PNG images
>     cran-png-r33          0.1-7-1          Read and write PNG images
>     gif2png               2.5.11-1         GIF to PNG graphics file conversion
>     libglpng1             1.45-3           PNG loader library for OpenGL
>     libglpng1-shlibs      1.45-3           Shared libraries for libglpng1 
> package
> i   libpng16              1.6.26-1         PNG image format handling library
>     libpng16-32bit        1.6.26-1         PNG library (32-bit)
>     libpng16-32bit-shlib  1.6.26-1         Shared libraries for libpng16 
> package
> i   libpng16-shlibs       1.6.26-1         Shared libraries for libpng16 
> package
>     libzopflipng1         1.0.1-1          High quality DEFLATE compressor
>     libzopflipng1-shlibs  1.0.1-1          High quality DEFLATE compressor
>     optipng               0.7.6-1          Optimizer for PNG files
>     pngcrush              1.8.8-1          Optimizer for PNG files
>     pngnq                 1.1-2            PNG Quantizer Tool
>     pngquant              2.7.2-1          Utility for lossy compression of 
> png
> i   system-pkgconfig-cai  1.14.6-1         [virtual pkgconfig package 
> representing cairo-png]
> i   system-pkgconfig-lib  1.6.25-1         [virtual pkgconfig package 
> representing libpng]
> i   system-pkgconfig-lib  1.6.25-1         [virtual pkgconfig package 
> representing libpng16]
>     web2png               2.5.11-1         Batch-converts entire web-pages 
> with gif2png
> smithp01-MB-20>

The system-pkgconfig-libpng* virtual packages are actually completely 
independent of Fink’s libpng*.  They represent the version of libpng that you 
get from XQuartz—we don’t actually use XQuartz’s libpng ever, but we have the 
virtual packages for completeness:

$ fink info system-pkgconfig-libpng
Scanning package description files..........
Information about 9932 packages read in 2 seconds.

system-pkgconfig-libpng-1.6.26-1: [virtual pkgconfig package representing 
libpng]
 Loads and saves PNG files
 .
 This package represents the pkgconfig file found at:
        /usr/X11/lib/pkgconfig/libpng.pc

$ fink info system-pkgconfig-libpng16
Scanning package description files..........
Information about 9932 packages read in 1 seconds.

system-pkgconfig-libpng16-1.6.26-1: [virtual pkgconfig package representing 
libpng16]
 Loads and saves PNG files
 .
 This package represents the pkgconfig file found at:
        /usr/X11/lib/pkgconfig/libpng16.pc

-- 
Alexander Hansen, Ph.D.
Fink User Liaison


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