site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=WNHHz6lRom9U6+LPxl6WXwGGnesMtJHnwWUmoouvBYY=; b=TL2I366OmT+tX4x3e/WIuuOrWXFW7/rt4DM1ksoAwYC00aDYt0JSEBF4+5+nNB6s/f r1q9Z8GW2nq5xJuYOmPEfa2K6RtWnfcRI7cStJB7BF8kHrqksC8gCNC0YXNLKTJJmPyX Nv6F0kYLinntWdTv2vuqnW59HbF47inIikmqw= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=DMXTJ53omAGLjCxHc0ZSiTMFownGuXfvAmjsykTdsTRJ8sGT9Rt8d0hzLbsQyvGq6K YOx3b72Jbsd41QmVIFdOU9IT8UbMrvNaf3ydMNAXIBCKZkOrfe8Dqz2L2kup8JXLNsu9 tktBRh2fIM15yheYDEncmO3yMszo0zIdxhq94= oh never mind, the objc directory is the gnu implementation. if obj4 is the runtime, then where is apple's code that lets gcc compile objective c? On Thu, Dec 18, 2008 at 11:23 AM, Jake McMahon <cellnetcream@gmail.com> wrote:

I can't just move the libobjc folder to a recent gcc release install dir can I? I read somewhere that Apple's gcc release is much different from the standard one.

On Thu, Dec 18, 2008 at 11:16 AM, Jake McMahon <cellnetcream@gmail.com> wrote:

...

I'm trying to write, compile, and run Objective C 2.0 code on Linux. I'm not interested in targeting the Mac at all.

So that leaves me with just working with the available source packages.

On this page: http://www.opensource.apple.com/darwinsource/10.5.6/

-gcc-5465 -gcc_42-5531

What are the differences between these two? And which would I have the best luck compiling on Linux? There are also tar.gz files as part of the October 2008 Developer Tools.

-gcc-5490 -gcc_42-5566

Besides grabbing one of the four above, and the obj4 package, is there anything else that I really need? I mean, is it even possible to build Apple's gcc packages on a computer that's not running Mac OS and get it to compile and run Objective-C 2.0 apps.

On Thu, Dec 18, 2008 at 11:05 AM, Jean-Daniel Dupas <devlists@shadowlab.org> wrote:

...

It depends what you want. Do you want to compile Mac OS X binary on Linux (and run them on OS X) or produce a Linux binary.

To run, an objc application need a runtime library (libobjc). When you compile objc sources, the compiler generate call to this library and create structure to represent class and other objc info in a format defined by this library. Actually there is two major runtime. The GNU one (provided with GCC), and the Apple one (aka Next Runtime for historical raison) provided on Darwin source as the obj4 package.

AFAK, the GNU runtime does not support properties, and other Obj-C 2 features. (I'm not sure it even support @try/@catch and @synchronize) And the Next/Apple Runtime is not available on Linux.

When you define and access properties in an objc 2 application, the compiler generate call to the runtime (like call to objc_getProperty() or objc_setProperty()). If the installed libobjc does not provide theses functions, you will not be able pass the linker step.

Le 18 déc. 08 à 16:33, Jake McMahon a écrit :

...

The run time has been released though. So advanced stuff aside, a basic 2.0 app that utilizes accessors should work, no?

On Thu, Dec 18, 2008 at 10:07 AM, Jean-Daniel Dupas <devlists@shadowlab.org> wrote:

...

Le 18 déc. 08 à 15:50, Jake McMahon a écrit :

...

I'm trying to install all the necessary tools needed to compile Objective C 2.0 code on a Linux workstation. I've downloaded the gcc-5465 package off the Apple website and executed:

> ../configure --prefix=/tmp/123/ --enable-languages=objc

followed by: make bootstrap

> /usr/include/limits.h:125:26: error: no include path in which to search > for limits.h > make[2]: *** [crtbegin.o] Error 1 > make[2]: Leaving directory `/home/user/Download/gcc-5465/xxx/gcc' > make[1]: *** [stage1_build] Error 2 > make[1]: Leaving directory `/home/user/Download/gcc-5465/xxx/gcc' > make: *** [bootstrap] Error 2

if I do

make (note, no bootstrap)

> ../../gcc/objc/objc-act.c: In function 'objc_init': > ../../gcc/objc/objc-act.c:716: warning: suggest braces around empty > body > in an 'if' statement > ../../gcc/objc/objc-act.c: In function 'objc_init_exceptions': > ../../gcc/objc/objc-act.c:7745: error: 'darwin_macosx_version_min' > undeclared (first use in this function) > ../../gcc/objc/objc-act.c:7745: error: (Each undeclared identifier is > reported only once > ../../gcc/objc/objc-act.c:7745: error: for each function it appears > in.) > ../../gcc/objc/objc-act.c: In function 'objc_create_init_utf16_var': > ../../gcc/objc/objc-act.c:19227: warning: implicit declaration of > function 'objc_cvt_utf8_utf16' > make[1]: *** [objc/objc-act.o] Error 1 > make[1]: Leaving directory `/home/user/Download/gcc-5465/xxx/gcc' > make: *** [all-gcc] Error 2

Is there something I'm missing here? I know there is already a gnu implementation of objc but I want to use the features of version 2.0. Any help or suggestions would be GREATLY! appreciated.

Compiling objc 2 on linux is one thing. Running it is another. Without the Next Runtime on your linux box, you will not be able to use Obj-C 2. The Next Runtime and the Gnu Runtime are not compatibles. Not to mention that a part of the Apple runtime is in the Foundation framework (like exception handling), and even if you managed to port the Next Runtime on Linux, you will not be able to use it for advanced features.

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