Features do not begin with and toolchain is not a valid feature; make that.
Features do not begin with --, and toolchain is not a valid feature; make that: bjam toolset=gcc-arm.
A very convenient way to debug issues with bjam is to include the -n argument. It will print all the command lines, instead of executing them. Then you'll see which g++ is actually being invoked.
If you already built everything, you might want to include -a as well, which means "rebuild everything from scratch.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.