Why does xCode 4.3 syntax highlighting break on some 64-bit projects?

Question

I use XCode on many 64-bit projects, with no problem… But many times, I will find that while a target is set for 64-bit, all-but-most-basic code-completion and syntax highlighting stops working. This is the case whether ARC is enabled - or not.. (and yes, I know 32-bit isn't valid target under ARC, blah blah blah… but the funny thing is.. Syntax highlighting usually DOES work on such a misbehaving project if then switched to 32 bit mode. I have tried deleting "Derived Data", cleaning, analyzing, etc. See below for an illustration of the issue. This is on a 10.7.3, 12GB RAM, 8-Core 2008 MacPro.

You know what I'm talking about if up at the top, you see Xcode saying

(Paused) Indexing… 0 of …

Any ideas?

Alodi

Xcode syntax highlighting is rapidly becoming a joke. I have to clear my derived data almost every day to kick it back into action. How long have you let it sit after deleting the derived data? Sometimes it takes a couple minutes for me. – Laufer

I have discovered today that the QUICKEST way to get it to work is to go into Product -> Edit Scheme -> and then Toggle Either / Or Peristent State / Document Versions. This , so far, has instantly brought back syntax recognition, without further muss or fuss.. Does it work for you, @sudorm-rf? – Alodi

Answer 1

I can confirm, after several tests, that goint into Product -> Edit Scheme -> and then Toggle Either / Or Peristent State / Document Versions DOES fix this.

Alodi

Surprisingly enough, Xcode hasn't broken on me for a couple of days. When it does break, and if this works, I'll be greatly obliged to you. ;) And by the way, do you mind letting me know what theme you're using there? Looks neat. – Laufer

@sudorm-rf It's just the normal Dusk theme, but with colors I chose.. Here is the Xcode theme, you just put it in ~/Library/Developer/Xcode/UserData/FontAndColorThemes/. You might simply be loving the font. It is the ONLY font I can actually read. Its the best. It's called "Ubuntu Mono" (bold)… It's new, so look around for it.. it's monospaced, and NOT the same as the "Other" Ubuntu fonts. Glad it's working for ya. Cheers! – Alodi

Thanks for the theme. I'm loving it. Unfortunately, syntax coloring broke for me on an iOS project, meaning that neither of these options are available to test. Oh well. – Laufer

@sudorm-rf make sure the source .m file in question is included under "Compile Sources" under "Build Phases". Xcode will only check the syntax if the source is up for compilation for the ACTIVE target. – Alodi

Thanks, but that wasn't the problem. I just restarted Xcode and it kicked it back into shape. The file is compiling just fine. – Laufer