A few months ago I wrote about a necessity for HTML5’s success: a design tool similar to Flash.
Well, here it is: Ajax Animator. Test it:
If you are a Cocoa or Cocoa Touch developer, you may have attempted to use features such as properties in GNUstep, only to be surprised that these don’t seem to be supported. This is because these are Objective-C 2.0 features.
To get the new features, the only way is to use a different compiler called clang. You may have seen this compiler used in newer releases of Xcode. This is a compiler that targets a virtual machine called LLVM before producing native code.
UPDATE May 4th 2011: GCC 4.6 has got the Objective-C 2.0 treatment, and since Debian includes GCC 4.6, I’d recommend you to try compiling your software that way. Not because it’s a better compiler — I have no idea which one works better — but because it’s there. Also, consider compiling GNUstep from trunk using GCC 4.6; it’s rather easy to do. (CC=gcc-4.6 ./configure, whenever compiling a component of GNUstep).
Let’s presume you managed to run an Objective-C program with GNUstep; that is, let’s presume you are aware of Project Center, or GNUmakefiles. If you are didn’t use GNUmakefiles, you should know that Project Center generates these in order to build your app.
Now you want to switch to clang, and you want to do so on your favorite operating system, Debian GNU/Linux.
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Here’s a little multiuser chat server written for various POSIX-compatible operating systems. Written and tested on Mac OS X 10.6, but it should work on your favorite Linux, too.
Placed in public domain, use it for whatever you want (since it’s so simple). 177 lines of pure C powah, dood.
Code follows after the break.
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I added fake caps&features to Z-XMPP to simulate iChat’s AV support. List of the caps&features that I added:
this.features.push("apple:profile:bundle-transfer");
this.features.push("apple:profile:efh-transfer");
this.features.push("apple:profile:transfer-extensions:rsrcfork");
this.features.push("http://www.apple.com/xmpp/message-attachments");
this.featuresExt["ice"] = ["apple:iq:vc:ice"];
this.featuresExt["recauth"] = ["apple:iq:vc:recauth"];
this.featuresExt["rdserver"] = ["apple:iq:rd:server"];
this.featuresExt["maudio"] = ["apple:iq:vc:multiaudio"];
this.featuresExt["audio"] = ["apple:iq:vc:audio"];
this.featuresExt["rdclient"] = ["apple:iq:rd:client"];
this.featuresExt["mvideo"] = ["apple:iq:vc:multivideo"];
this.featuresExt["auxvideo"] = ["apple:iq:vc:auxvideo"];
this.featuresExt["rdmuxing"] = ["apple:iq:rd:muxing"];
this.featuresExt["avcap"] = ["apple:iq:vc:capable"];
this.featuresExt["avavail"] = ["apple:iq:vc:available"];
this.featuresExt["video"] = ["apple:iq:vc:video"];
And here’s what I get when I press call:
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If you want to get started with Objective-C, and you have some background in C/C++, read this neat post I randomly stumbled upon: “Why Objective-C is cool“. It’s a pretty nice description and hopefully removes a lot of WTFs from a newbie.
Then, read CocoaLab‘s free e-book “Become an Xcoder“.
Finally, this is the longest route, but the one I went with: watch all 18 hours + extras of CS193P iPhone Application Development 2009 (and then go watch some of the 2010 lessons, too). It takes a long time to watch, but it’s worth it.
I can’t document everything from scratch since I don’t have a machine that’s “virgin” enough for me to document that. This machine has been touched by Fink, MacPorts, Rudix, and several hand-build packages; I’m not sure if MacFUSE installs the necessary stuff for pkg-config.
But, let’s presume you:
a) installed macfuse,
b) fetched pkg-config source code from freedesktop.org (I took 0.25)
c) built it and installed it (./configure, make, sudo make install)
d) switched to pristine Python 2.6 that Apple ships with Snow Leopard.
I’m also obviously using Snow Leopard, so no guarantees about other OS X versions.
Ok, and now come the tips…
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