Re: [gentoo-alt] Prefix on Sierra: ObjC broken with clang-3.8

[Askar Bektassov]

Hi Michael,

I am running prefix on Sierra, without issues. Please note, however, that I bootstrapped when I was still on El Capitan.

My only guess, is make sure that xcode command line tools are used instead of full Xcode package (sudo xcode-select -s /Library/Developer/CommandLineTools).

Good luck,
--
Askar Bektassov (Аскар Бектасов)
Sent from mobile, please excuse my brevity and typos

> On 30 Oct 2016, at 18:31, Michael Weiser <michael@×××××××××××××××.net> wrote:
>
> Hey guys,
>
> is anyone running prefix on Sierra yet?
>
> I am and I've had only one but majorish problem getting it to work:
> Everything containing Objective-C code (gtk, dev-scheme/guile, git,
> glib, lbdb) failed to compile with clang 3.8. The errors all were like
> this:
>
> In file included from /usr/local/gentoo/var/tmp/portage/x11-libs/gtk+-2.24.31-r1/work/gtk+-2.24.31/gdk/quartz/GdkQuartzView.c:21:
> In file included from /usr/local/gentoo/var/tmp/portage/x11-libs/gtk+-2.24.31-r1/work/gtk+-2.24.31/gdk/quartz/GdkQuartzView.h:21:
> In file included from /System/Library/Frameworks/AppKit.framework/Headers/AppKit.h:10:
> In file included from /System/Library/Frameworks/Foundation.framework/Headers/Foundation.h:10:
> In file included from /System/Library/Frameworks/Foundation.framework/Headers/NSArray.h:5:
> /System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:44:12:
> error: unknown property attribute 'class'
> @property (class, readonly) BOOL supportsSecureCoding;
>           ^
>
> On a hunch that Apple once again started using new language constructs
> in the system headers as soon as they became available in their latest
> Xcode clang I've hacked the llvm-3.9.0 ebuild to install a working
> clang-3.9 and lo and behold all the stuff that failed before compiled
> and installed fine.
>
> Did anyone else observe this behaviour or is something screwed up on my
> system?
>
> BTW: That system was a fresh install of El Capitan with Xcode 8 which I
> upgraded just a few days later to Sierra. I manually updated the Xcode
> command line tools to 8.0 for Sierra via the .pkg from
> developer.apple.com.
>
> Another way might have been to downgrade Xcode to possibly get the older
> system headers as well but I didn't try that. (The way out is forward. ;)
> --
> Thanks,
> Michael
>