Re: ARC and dispatch_release(queue) abends

[Fred Kiefer]

Hi Mark,

from the linker warnings you are getting I would say you did not recompile 
GNUstep after switching to the new libobjc version. Perhaps you should do that 
first before digging into the other issues you have.

Fred

On the road

Am 11.06.2015 um 19:41 schrieb allynm <mark.allyn@verizon.net>:

> Hello,
> 
> I'm testing a new installation of libobjc2-1.7 on a 32bit Ubuntu 14.04
> installation and using a GNUmakefile.  The program I'm using was written by
> Tobias Lensing some time ago.  The program looks like this:
> 
> 
>> #import 
>> &lt;
>> Foundation/Foundation.h
>> &gt;
>> #import 
>> &lt;
>> AppKit/AppKit.h
>> &gt;
>> #import 
>> &lt;
>> dispatch/dispatch.h
>> &gt;
>> int main(int argc, const char * argv[])
>> {    
>>     @autoreleasepool {
>> 
>>        int multiplier = 7;
>>        int (^myBlock)(int) = ^(int num) {
>>            return num * multiplier;
>>        };
>> 
>>       NSLog(@"%d", myBlock(3));
>> 
>>       dispatch_queue_t queue = dispatch_queue_create(NULL, NULL); 
>> 
>>        dispatch_sync(queue, ^{
>>            printf("Hello, world from a dispatch queue!\n");
>>        });
>> 
>>        //dispatch_release(queue);  
>>     }
>> 
>>    @autoreleasepool{
>>        [NSApplication sharedApplication];
>>        NSRunAlertPanel(@"Test", @"Wow it works!", @"OK", nil, nil);
>> 
>>      }          
>>    return 0;
>> }
> 
> The GNUmakefile is this:
> 
> 
>> GNUSTEP_MAKEFILES = /usr/local/share/GNUstep/Makefiles
>> 
>> APP_NAME = lensingmain
>> include $(GNUSTEP_MAKEFILES)/common.make
>> ADDITIONAL_INCLUDE_DIRS=-I/home/mark/GNUstep/Library/Headers
>> -I/usr/GNUstep/Local/Library/Headers 
>> -I/usr/GNUstep/System/Library/Headers
>> ADDITIONAL_OBJCFLAGS= -fobjc-arc -fblocks -fobjc-nonfragile-abi
>> -fobjc-runtime=gnustep-1.7
>> ADDITIONAL_LIB_DIRS =-L/usr/local/lib -L/usr/lib
>> -L/usr/GNUstep/Local/Library/Libraries
>> ADDITIONAL_LDFLAGS = -lgnustep-gui -ldispatch -lgnustep-base 
>> lensingmain_OBJC_FILES = lensingmain.m
>> 
>> -include GNUmakefile.preamble
>> include $(GNUSTEP_MAKEFILES)/application.make
>> -include GNUmakefile.postamble
> 
> The program builds with warnings as follows:
> 
>> Making all for app lensingmain...
>> Creating lensingmain.app/....
>> Compiling file lensingmain.m ...
>> clang-3.7: warning: argument unused during compilation:
>> '-fobjc-nonfragile-abi'
>> clang-3.7: warning: argument unused during compilation:
>> '-fobjc-nonfragile-abi'
>> Linking app lensingmain ...
>> /usr/bin/ld: warning: libobjc.so.4.6, needed by
>> /usr/GNUstep/Local/Library/Libraries/libgnustep-gui.so, may conflict with
>> libobjc.so.4
>> /usr/bin/ld: warning: libdispatch.so.0, needed by
>> /usr/local/lib/libgnustep-base.so, may conflict with libdispatch.so.1
>> Creating lensingmain.app/Resources...
>> Creating stamp file...
>> Creating lensingmain.app/Resources/Info-gnustep.plist...
>> Creating lensingmain.app/Resources/lensingmain.desktop...
> 
> I don't understand why -fobjc-nonfragile-abi isn't used.
> I don't understand why the warnings about .so conflicts are issued.
> 
> When I run the program, here's what I get:
> 
>> Module /home/mark/libobjc2//home/mark/libobjc2/Protocol2.m version 9
>> doesn't match runtime 8
>> Aborted (core dumped)
> 
> From the research I have done it appears that dispatch_release is
> incompatible with ARC, which is why it is commented out in the source code. 
> I also was under the impression that -fobjc-nonfragile-abi was required for
> compilation.  There has been a confusing dialogue over several years on how
> to do ARC and dispatch queues.  Perhaps someone could shed light on this?
> 
> Also what's going on with the .so conflicts?
> 
> Lastly, if someone could clean up my GNUmakefile, I'd appreciate it.  It's
> no doubt redundant and probably buggy.
> 
> Thanks,
> Mark Allyn
> 
> 
> 
> --
> View this message in context: 
> http://gnustep.8.n7.nabble.com/ARC-and-dispatch-release-queue-abends-tp39364.html
> Sent from the GNUstep - General mailing list archive at Nabble.com.
> 
> _______________________________________________
> Discuss-gnustep mailing list
> Discuss-gnustep@gnu.org
> https://lists.gnu.org/mailman/listinfo/discuss-gnustep