Re: things that fail to build with gcc and libobjc2

[Wolfgang Lux]

Sebastian Reitenbach wrote:

> and StepTalk from svn fails to compile with the following error  
> message:
> Making all for framework StepTalk...
> cc STObjCRuntime.m -c \
>              -MMD -MP -pipe -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 -
> DGNU_GUI_LIBRARY=1 -DGNU_RUNTIME=1 -DGNUSTEP_BASE_LIBRARY=1 -fno- 
> strict-
> aliasing -fPIC -DDEBUG -fno-omit-frame-pointer -Wall -DGSWARN - 
> DGSDIAGNOSE -
> Wno-import -O2 -pipe -g -fgnu-runtime -Wno-import - 
> DSTEPTALK_VERSION=0.10.0 -
> fconstant-string-class=NSConstantString -I./derived_src -I. -
> I/usr/local/include -I/gnustep-
> steptalk-0.11.0_writes_to_HOME/GNUstep/Library/Headers -I/usr/local/ 
> include \
>               -o obj/StepTalk.obj/STObjCRuntime.m.o
> STObjCRuntime.m: In function 'STAllObjectiveCClasses':
> STObjCRuntime.m:67: warning: 'objc_next_class' is deprecated  
> (declared at
> /usr/local/include/objc/runtime-deprecated.h:41)
> STObjCRuntime.m:69: warning: implicit declaration of function
> 'class_get_class_name'
> STObjCRuntime.m:69: warning: passing argument 1 of  
> 'stringWithCString:' makes
> pointer from integer without a cast
> STObjCRuntime.m: In function 'STSelectorFromString':
> STObjCRuntime.m:144: warning: 'sel_register_typed_name' is deprecated
> (declared at /usr/local/include/objc/runtime-deprecated.h:73)
> STObjCRuntime.m: In function 'STCreateTypedSelector':
> STObjCRuntime.m:165: warning: 'sel_get_name' is deprecated (declared  
> at
> /usr/local/include/objc/runtime-deprecated.h:59)
> STObjCRuntime.m:191: warning: 'sel_register_typed_name' is deprecated
> (declared at /usr/local/include/objc/runtime-deprecated.h:73)
> STObjCRuntime.m: In function 'STConstructMethodSignatureForSelector':
> STObjCRuntime.m:207: warning: 'sel_get_name' is deprecated (declared  
> at
> /usr/local/include/objc/runtime-deprecated.h:59)
> STObjCRuntime.m: In function 'STMethodSignatureForSelector':
> STObjCRuntime.m:250: warning: 'sel_get_type' is deprecated (declared  
> at
> /usr/local/include/objc/runtime-deprecated.h:67)
> STObjCRuntime.m:255: warning: 'sel_get_type' is deprecated (declared  
> at
> /usr/local/include/objc/runtime-deprecated.h:67)
> STObjCRuntime.m: At top level:
> STObjCRuntime.m:261: warning: 'struct objc_method_list' declared  
> inside
> parameter list
> STObjCRuntime.m:261: warning: its scope is only this definition or
> declaration, which is probably not what you want
> STObjCRuntime.m: In function 'selectors_from_list':
> STObjCRuntime.m:264: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:269: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:272: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:274: error: dereferencing pointer to incomplete type
> STObjCRuntime.m: In function 'STAllObjectiveCSelectors':
> STObjCRuntime.m:290: warning: 'objc_next_class' is deprecated  
> (declared at
> /usr/local/include/objc/runtime-deprecated.h:41)
> STObjCRuntime.m:292: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:294: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:297: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:299: error: dereferencing pointer to incomplete type
> STObjCRuntime.m:301: error: dereferencing pointer to incomplete type
> gmake[4]: *** [obj/StepTalk.obj/STObjCRuntime.m.o] Error 1
> gmake[3]: *** [internal-framework-run-compile-submake] Error 2
> gmake[2]: *** [StepTalk.all.framework.variables] Error 2
> gmake[2]: Leaving directory `/home/ports/pobj/gnustep-
> steptalk-0.11.0/StepTalk-0.11.0/Frameworks/StepTalk'
> gmake[1]: *** [internal-all] Error 2
> gmake[1]: Leaving directory `/home/ports/pobj/gnustep-
> steptalk-0.11.0/StepTalk-0.11.0/Frameworks'
> gmake: *** [internal-all] Error 2
> *** Error code 2

I've updated STObjCRuntime.m in svn so that it now uses the Objective- 
C 2 API with the exception of type selectors, which are a GNU  
extension and not part of Apple's runtime and thus the API. Compiling  
against libobjc2 you probably still will get deprecated warnings for  
them (I haven't tested it because I don't have libobjc2 installed  
anywhere), but given the number of warnings produced by StepTalk,  
these shouldn't matter much :-(

Wolfgang