clang-11 missing dependency to libstdc++11

Support Installation and Configuration
#1

Just a slight bug report for clang-11 package
A very recent upgrade caused clang-11 to not work out anymore. Turns out it depends on libstdc++11 which is not part of it’s dependencies. After manually installing it everything clang worked out again.

BR

#2

Hello! Thank you for your report i’m telling Palinuro. HOpefully he won’t forget about thsi bug