OpenWrt/LEDE: dropbear & MIPS & gcc 7.1.0

[Syrone Wong]

Hi all,

Recently, I upgrade my LEDE toolchain to binutils 2.28 & GCC 7, notice
I cannot SSH to router.

A more detailed description can be found
(http://lists.infradead.org/pipermail/lede-dev/2017-May/007753.html),
later, Kevin find it might related to libtommath
(http://lists.infradead.org/pipermail/lede-dev/2017-May/007797.html).

Two possible solution:

i. change libtommath compilation flag from -Os to -O2:
http://lists.infradead.org/pipermail/lede-dev/2017-May/007843.html

ii. update the bundled libtom* to latest:
http://lists.infradead.org/pipermail/lede-dev/2017-May/007849.html

Please update the bundled libraries to latest, or help to find the root cause.

Thanks in advance

Best Regards,
Syrone Wong