[clang] Default to -fno-sized-deallocation for AIX (#97076)

Some `libc++` LIT test cases and user code define their own version of
`operator delete` that are not sized. With `-fno-sized-deallocation`,
destructors call the non-sized `operator delete` and it will be resolved
to the user defined version. However, with `-fsized-deallocation`,
destructors will call the sized `operator delete` which will be resolved
to the weak definition in `libc++abi` because the user code does not
define the corresponding sized version. The `libc++abi` sized `operator
delete` in turn calls the non-sized version of `operator delete` of the
same shared object inside `libc++abi` instead of the user defined
version on AIX because runtime linking is not the default for AIX and
therefore, fails the tests or user code. This patch sets
`-fno-sized-deallocation` as the default for AIX if neither
`-fsize-deallocation` nor `-fno-sized-deallocation` is explicitly set,
similar to what is done for ZOS.

0 files changed, 0 insertions, 0 deletions