[dmh2000]

gcc warning: ISO C++ forbids zero-size array ‘payload’ [-Wpedantic]

clang warning: flexible array members are a C99 feature [-Wc99-extensions]

is this still the case?

[dpzmick]

Try compiling with c++11 turned on.

[dmh2000]

I used -std=c++14

[slrz]

Use -std=gnu++14 then.