[K42-discussion] virtual destructors

[Donour Sizemore]

>
> Donour, can you try inserting a DEFINE_NOOP_NEW() invocation into 
> VAllocServices() (and anywhere else you've had to define virtual 
> destructors), and see if that clears up the undefined symbol?
So the trickiest of these that I've found are the StubHEADER.H that 
subgen generates. The natural solution is to emit a virtual destructor 
along with each stub file. Something like:

--
...

printf("\tDEFINE_NOOP_NEW(%s);\n", sclass)   > SF;
printf("\tvirtual ~%s() { }\n", sclass)      > SF;
printf("};\n\n")                             > SF;
--

However I'm coming up with missing symbols.


powerpc64-linux-nm -p k42sys.o | egrep -w U
                 U __dso_handle
                 U .__cxa_atexit


I think these emitted from the initialization of global objects. Indeed, 
here is every object that references them:

../install/lib/powerpc/fullDeb/libbase.a:ProgExec.o:                 U 
.__cxa_atexit
../powerpc/fullDeb/lib/libc/usr/ProgExec.o:                 U .__cxa_atexit
../powerpc/fullDeb/os/kernel/init/AsyncTester.o:                 U 
.__cxa_atexit
../powerpc/fullDeb/os/servers/baseServers/FileSystemNFS.o:                 
U .__cxa_atexit
../powerpc/fullDeb/os/servers/baseServers/FileSystemK42RamFS.o:                 
U .__cxa_atexit
../powerpc/fullDeb/os/servers/baseServers/FileSystemKFSK42.o:                 
U .__cxa_atexit
../powerpc/fullDeb/os/servers/k42Ramfs/FileSystemK42RamFS.o:                 
U .__cxa_atexit

I tried to add definitions of __dso_handle and atexit to ProgExec and 
AsyncTester, but it appears they are already defined there. Ideas? :)

donour