pngquant @2.1.0 Portfile

[lpancescu (Laurențiu Păncescu)]

Could you add an official port for pngquant, please? It uses advanced algorithms to create lossy, indexed PNG files, almost identical to the original, but typically 50-70% smaller (see ​http://pngquant.org).

I managed to create a Portfile after skimming through the MacPorts documentation. I doubt it's up to the MacPorts standards, but it works for me on OS X 10.9.2, so maybe it's okay as a starting point.

[ryandesign (Ryan Carsten Schmidt)]

Thanks, this is a good start.

[ryandesign (Ryan Carsten Schmidt)]

Committed in r117656 with these changes:

• adjust whitespace to conform to modeline (indents at multiples of 4 spaces)
• use github portgroup
• download distfile from homepage, since that's where the download link takes you, and because those are bz2 files, which are smaller than the gz files github offers
• patch Makefile to remove incorrect assumptions about where it should look for dependencies
• ensure we're UsingTheRightCompiler and -arch flags
• add universal variant and set ARFLAGS in order to add the s flag which makes the universal build succeed; equivalently, we could have patched lib/Makefile to run ranlib after running ar
• use destroot.env instead of destroot.post_args, thereby eliminating the need to specify destroot.destdir again
• all build environment variables needed to be copied to the destroot, so I used eval to accomplish that
• add dependency on zlib, since the Makefile does use the flag -lz
• install documentation files