foo.m

@implementation Foo
-(void)bar {}
@end
int main() {}

log

/tmp % clang -o foo foo.m -lobjc -w
/tmp % strip -N foo
/tmp % llvm-nm-mp-15 foo
0000000100003f80 t <redacted LC_MAIN>
0000000100003f6c t <redacted function 0>
/tmp % xcrun llvm-nm foo
0000000100003f6c t -[Foo bar]
0000000100008098 S _OBJC_CLASS_$_Foo
00000001000080c0 S _OBJC_METACLASS_$_Foo
0000000100000000 T __mh_execute_header
0000000100003f80 T _main