Re: [PATCH] Another board file for remote host

[Yao Qi <yao@codesourcery.com>]

Yao Qi <yao@codesourcery.com> writes:

>> +global GDB
>> +set GDB [file join [pwd] "../gdb"]
>>
>> Check if GDB has been set first, allow the user to
>> pass this in from the command line.
>
> GDB is always set in lib/gdb.exp and it is loaded earlier than the
> board file.  In lib/gdb.exp:
>
> if ![info exists GDB] {
>     if ![is_remote host] {
> 	set GDB [findfile $base_dir/../../gdb/gdb "$base_dir/../../gdb/gdb" [transform gdb]]
>     } else {
> 	set GDB [transform gdb]
>     }
> }
>
> so we can't do the check here.
>
>> +# The directory to copy files to.  In default, we choose ./remote-host, to
>> +# avoiding messing up your HOME.  You can choose other directory as
>> +# you like.
>> +set host_dir [file join [pwd] "remote-host"]
>>
>> How about allowing the user to pass this in from the command line?
>> By convention such variables are then uppercase.
>>
>
> That is fine to me.  In the updated patch, user can specify the
> directory in command line via variable HOST_DIR.
>
>> +
>> +proc ${board}_download { board src dest } {
>> +    global env board_type
>> +    global host_dir
>> +
>> +    if { [llength $dest] > 0 } {
>> +	set destfile [lindex $dest 0]
>> +    } else {
>> +	set destfile [file tail $src]
>> +    }
>>
>> This doesn't feel right.
>> I realize /usr/share/dejagnu/remote.exp:remote_download
>> checks for whether the third parameter can be a list, but
>> remote_download is a varargs function (the name of the last
>> variable is "args") and is not a "board" function.
>> Other ${foo}_download functions that are actual "board" functions,
>> e.g., /usr/share/dejagnu/remote.exp:standard_download,
>> or gdb/testsuite/boards/remote-stdio-gdbserver.exp,
>> don't treat the third parameter as if it can be a list.
>
> Yes, remote_download acts as a wrapper or an adapter to "board"
> functions which are defined in board files.  In tcl, simple string is
> also list, see,
>
> % llength "foo"
> 1
> % lindex "foo" 0     
> foo
>
> The code above is right to me but unnecessary.  Use dest as a string in
> the updated patch.

Hi, Doug,
How do you think of the updated patch?
https://sourceware.org/ml/gdb-patches/2014-09/msg00117.html

-- 
Yao (齐尧)