Darling: exit() of FreeBSD libc is not being called

[bugaevc]

To reproduce:

Darling [~]$ mktemp  # works
/tmp/tmp.HwLVahuF
Darling [~]$ mktemp | cat
Darling [~]$

mktemp is in fact one of the few programs that do not call fflush or exit manually, thus exposing the issue.

dyld does exit(main(argc-1, &argv[1], envp)), but that's its own exit from host's libc, and it knows nothing about buffered I/O and whatever else Darling's/FreeBSD's libc wants to flush/close/dealloc at exit.

[LubosD]

Good news is this will also get fixed after move to Mach-O.