On Oct 29, 2012, at 9:08 AM, David Edelsohn wrote: > > Some of the support you are adding is equivalent to code in > libgcc/crtstuff.c. My question was if it is possible to re-use some > of that code for the new AIX support. > > Is the code really C++? Both cxa_atexit.cc and cxa_finalize.cc are > providing C interfaces.
The only thing I see in crtstuff.c is a call to __cxa_finalize which is inside ELF specific code. There is no __cxa_atexit and no __cxa_finalize code in the GCC source. There are also things like this: > #ifdef CRTSTUFFS_O > void *__dso_handle = &__dso_handle; > #else > void *__dso_handle = 0; > #endif which locks in one or the other at compile time for crtstuff.c but that decision needs to be made at link time because a "main" program needs to set it to 0 while a loadable shared module needs to set it to &__dso_handle (like I did in collect2). So, there isn't much there. What is there is working for some platform that I don't know anything about. I chose to not touch it. I'm sure they could be rewritten in C. GNUs libc choose to do them in C++ probably because C++ just gives a nicer way to do things. The real c++ part of the new code is mostly around the locking. Perry
