Re: GUI test with -fobjc-arc yields ABI Error

[David Chisnall]

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.
> 


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