Not quite sure if this is directly related to tango, but...
I saw the getpid() function in stdc.posix.unistd. It wasn't excluded for windows, but it wouldnt compile since pid_t etc wasn't included for windows in posix/sys/types. I looked at mingw, and they has getpid and at least pid_t, ssize_t and off_t. I just added the definitions to posix/sys/types to get it to compile, and it seems to work ok, but I guess it wasn't included for some reason...
Can I expect any weird behaviour/crash because of this?