After a few comments, a made a new build of Midnight Commander 4.7.5, this time including the fix to ensure that the x07 ARM based NAS can do ftp. It should make no difference for others. It can be downloaded here.
The package is about 11MB, and the install size around 26MB. There is no integration with DSM, as it is purely a command line tool. You will get an error if you try to run this package from the DSM interface, but this is normal. You will need to connect to your NAS through ssh or telnet to use it. Make sure your terminal is in UTF-8 mode or you’ll get some strange characters on screen. Also, the mouse is supported, at least with putty on Windows. It shall support all the NAS from the x07 to x11 series. Tested successfully on a DS408 (ppc854x) and a 210j (88f6281).
Build with midnight commander 4.7.5, with patch 2282 and proposed fix for 2401, glib 2.26.1, slang 2.2.3, ncurses terminfo db from ubuntu, file 5.05, xz 5.0.0, bzip2 1.0.6, and zlib 1.2.5. No changes were made to the source code, only usual build configuration. Specific scripts to the Synology DSM were also added.
As always, comments and remarks welcome, enjoy!