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Re: GUI test with -fobjc-arc yields ABI Error
From: |
David Chisnall |
Subject: |
Re: GUI test with -fobjc-arc yields ABI Error |
Date: |
Sat, 28 Dec 2013 17:47:56 +0000 |
GNUstep Make still provides the old flag (I find GNUstep Make a maze of
twisting rules, all alike, so I can't fix it). You almost certainly want to
provide the new flag, as -fobjc-nonfragile-abi by itself will use a very
conservative set of runtime features.
David
On 28 Dec 2013, at 16:54, Patryk Laurent <plaurent@me.com> wrote:
> Excellent. So, now I build GNUStep make using:
>
> cd ~/core/make
> ./configure --enable-debug-by-default --with-layout=gnustep
> --enable-objc-nonfragile-abi
>
> And success: The result is that my guitest.m code runs fine when compiled
> with -fobjc-arc! I've updated the wiki to include this flag
> (http://wiki.gnustep.org/index.php/GNUstep_under_Ubuntu_Linux)
>
> Interestingly, however, now when compiling guitest.m I get the warning:
> "argument unused during compilation: '-fobjc-nonfragile-abi'". So does this
> mean that the --enable-objc-nonfragile-abi was important for building GNUStep
> itself, but is not so necessary afterwards?
>
> Thanks,
> Patryk
>
> On Dec 28, 2013, at 02:27 AM, David Chisnall <theraven@sucs.org> wrote:
>
>> On 27 Dec 2013, at 23:15, Patryk Laurent <plaurent@me.com> wrote:
>>
>>> David,
>>> I had already specified -fobjc-runtime=gnustep-1.7 when I got the ABI
>>> Error. (See below)
>>
>> I mean you'll need to specify it for everything. If you look at how the
>> FreeBSD GNUstep ports are set up, they pass the correct arguments to the
>> various configure things to make this Just Workâ˘. It sounds like you didn't
>> specify it for base / gui. The easiest thing to do is make -make add the
>> flag for you.
>>
>>> (If I try -fobjc-nonfragile-abi I get: clang-3.5: warning: argument unused
>>> during compilation: '-fobjc-nonfragile-abi')
>>
>> Yes, if you also specify -fobjc-runtime then it's redundant.
>>
>> David
>>
>>> Thanks,
>>> Patryk
>>> On Dec 27, 2013, at 01:11 PM, David Chisnall <theraven@sucs.org> wrote:
>>>> If you want to use ARC, then you must use the new ABI. Either specify
>>>> -fobjc-runtime=gnustep-1.7, or -fobjc-nonfragile-abi.
>>>> David
>>>> On 27 Dec 2013, at 20:04, Patryk Laurent <plaurent@me.com> wrote:
>>>>> David,
>>>>> Another oddity that maybe will help diagnose the issue: If I compile a
>>>>> GUI test program without -fobjc-arc, everything works fine. However, if I
>>>>> include -fobjc-arc, compilation is successful but running is not, see
>>>>> below:
>>>>> patryk@paklbox:~$ clang `gnustep-config --objc-flags` `gnustep-config
>>>>> --objc-libs` -fobjc-runtime=gnustep-1.7 -fblocks -fobjc-arc -lobjc
>>>>> -ldispatch -lgnustep-base -lgnustep-gui guitest.m
>>>>> patryk@paklbox:~$ ./a.out
>>>>> Objective-C ABI Error: Loading modules from incompatible ABIs while
>>>>> loading ./GSBackend.m
>>>>> a.out: /home/patryk/libobjc2/loader.c:53: void __objc_exec_class(struct
>>>>> objc_module_abi_8 *): Assertion `objc_check_abi_version(module)' failed.
>>>>> Aborted (core dumped)
>>>>> (This is under Ubuntu 13.10 Desktop, following the instructions here:
>>>>> http://wiki.gnustep.org/index.php/GNUstep_under_Ubuntu_Linux)
>>>>> Patryk
>>>>> Here is the source to guitest.m:
>>>>> patryk@paklbox:~$ cat guitest.m
>>>>> #import <AppKit/AppKit.h>
>>>>> int main()
>>>>> {
>>>>> NSApplication *app; // Without these 2 lines, seg fault may occur
>>>>> app = [NSApplication sharedApplication];
>>>>> NSAlert * alert = [[NSAlert alloc] init];
>>>>> [alert setMessageText:@"Hello alert"];
>>>>> [alert addButtonWithTitle:@"All done"];
>>>>> [alert runModal];
>>>>> }
>>>>> Compiling it without -fobjc-arc works fine:
>>>>> patryk@paklbox:~$ clang `gnustep-config --objc-flags` `gnustep-config
>>>>> --objc-libs` -fobjc-runtime=gnustep-1.7 -fblocks -lobjc -ldispatch
>>>>> -lgnustep-base -lgnustep-gui guitest.m # NSAlert test works fine without
>>>>> -fobjc-arc.
>>>> -- Sent from my Difference Engine
>>
>>
>> -- Sent from my Cray X1
>>
-- Sent from my Difference Engine