Re: hurd: update RPC prototypes

[Pedro Alves]

On 08/27/2017 07:41 PM, Samuel Thibault wrote:
> Since hurd's baf7e5c ('hurd: Use polymorphic port types to return some
> rights.'), some RPCs prototypes have changed, gdb needs the
> corresponding update.
> 
> * gdb/gnu-nat.c (S_proc_getmsgport_reply, S_proc_task2proc_reply,
> S_proc_pid2proc_reply): Add `mach_msg_type_name_t type' parameter.

Say someone downloads some prebuilt Debian Hurd image or some
such and wants to build newer gdb on that system.  I assume that that would be
broken with this change?  What's the policy regarding building ToT gdb on
non-ToT Hurd systems?  Is the intention to only ever support building
ToT gdb with ToT Hurd?

Thanks,
Pedro Alves

> 
> diff --git a/gdb/gnu-nat.c b/gdb/gnu-nat.c
> index d5e3841e68..402027866b 100644
> --- a/gdb/gnu-nat.c
> +++ b/gdb/gnu-nat.c
> @@ -1874,17 +1876,19 @@ ILL_RPC (S_proc_setmsgport_reply,
>        mach_port_t oldmsgport)
>  ILL_RPC (S_proc_getmsgport_reply,
>        mach_port_t reply_port, kern_return_t return_code,
> -      mach_port_t msgports)
> +      mach_port_t msgports, mach_msg_type_name_t type)
>  ILL_RPC (S_proc_pid2task_reply,
>        mach_port_t reply_port, kern_return_t return_code, mach_port_t task)
>  ILL_RPC (S_proc_task2pid_reply,
>        mach_port_t reply_port, kern_return_t return_code, pid_t pid)
>  ILL_RPC (S_proc_task2proc_reply,
> -      mach_port_t reply_port, kern_return_t return_code, mach_port_t proc)
> +      mach_port_t reply_port, kern_return_t return_code,
> +      mach_port_t proc, mach_msg_type_name_t type)
>  ILL_RPC (S_proc_proc2task_reply,
>        mach_port_t reply_port, kern_return_t return_code, mach_port_t task)
>  ILL_RPC (S_proc_pid2proc_reply,
> -      mach_port_t reply_port, kern_return_t return_code, mach_port_t proc)
> +      mach_port_t reply_port, kern_return_t return_code,
> +      mach_port_t proc, mach_msg_type_name_t type)
>  ILL_RPC (S_proc_getprocinfo_reply,
>        mach_port_t reply_port, kern_return_t return_code,
>        int flags, procinfo_t procinfo, mach_msg_type_number_t procinfoCnt,
>