hi team,
first of all, i just built the clang-18 properly and wow am i amazed. here i
was asking about wasm and stuff, i should have been a little more thorough, my
bad.
-really this thing is a work of art. great yob
now to my question, which i also posted to
stackexchange(https://stackoverflow.com/questions/78602533/using-nsobject-with-modern-os-x-sdk-14-4-and-10-7-macosx-deployment-target)
briefly: the NSObject class moved from the runtime to Foundation from Lion to
Mountain Lion.
so there is a little bit of a “hole” in trying to compile for a 10.7 target
using an SDK that is >=10.8:
> ld64.lld: error: undefined symbol: OBJC_CLASS_$_NSObject
> >>> referenced by
> >>> /Users/Gagan/Downloads/mozilla-unified/toolkit/mozapps/update/updater/launchchild_osx.mm
> >>> launchchild_osx.o:(symbol
> >>> OBJC_CLASS_$_ElevatedUpdateServer+0x8)
> >>> referenced by
> >>> /Users/Gagan/Downloads/mozilla-unified/toolkit/mozapps/update/updater/progressui_osx.mm
> >>> progressui_osx.o:(symbol OBJC_CLASS_$_UpdaterUI+0x8)
>
> ld64.lld: error: undefined symbol: OBJC_METACLASS_$_NSObject
> >>> referenced by
> >>> /Users/Gagan/Downloads/mozilla-unified/toolkit/mozapps/update/updater/launchchild_osx.mm
> >>> launchchild_osx.o:(symbol
> >>> OBJC_METACLASS_$_ElevatedUpdateServer+0x8)
> >>> referenced by
> >>> /Users/Gagan/Downloads/mozilla-unified/toolkit/mozapps/update/updater/launchchild_osx.mm
> >>> launchchild_osx.o:(symbol
> >>> OBJC_METACLASS_$_ElevatedUpdateServer+0x0)
> >>> referenced by
> >>> /Users/Gagan/Downloads/mozilla-unified/toolkit/mozapps/update/updater/progressui_osx.mm
> >>> progressui_osx.o:(symbol OBJC_METACLASS_$_UpdaterUI+0x8)
> >>> referenced 1 more times
> clang++: error: linker command failed with exit code 1 (use -v to see
> invocation)
usually it will say something like this because, as is obvious to this educated
and sharp crowd, the >=10.8 objc runtime will not have NSObject like 10.7, and
thus there is no framework we can link for a 10.7 target to get NSObject.
have any of you vets dealt this issew? is there a simple way? i haven’t thought
too hard about trying to use an OSObject but i’m open to alternatives.
maybe duplicating the class and renaming any usage with a macro? i was hoping
for sokmething cleaner tho.
Thanks,
Gagan
