toolchaini/gcc: fix libstdc++ dual abi model
authorIvan Maslov <avenger_msoft@mail.ru>
Sat, 29 Jan 2022 20:11:30 +0000 (23:11 +0300)
committerPetr Štetiar <ynezz@true.cz>
Mon, 16 Jan 2023 07:45:38 +0000 (08:45 +0100)
commitc0b4303d2e2f4a9e1d4684fd584e6b6548666f0f
treede5998c1525906c0fa5d43689680a4453bf22ea0
parentaa5023b9cd0f31921561005c30bde49cf0834902
toolchaini/gcc: fix libstdc++ dual abi model

libstdcxx-dual-abi needs to be enabled to actually support C++11 ABI.
Enable the config flag to also permit support of .NET 6 development on
OpenWrt.

Signed-off-by: Ivan Maslov <avenger_msoft@mail.ru>
[ reword commit description and title ]
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
(cherry picked from commit 3c06a344e9c7c03c49c9153342e68a5390651323)
toolchain/gcc/common.mk