[PATCH] build: Ensure mandatory compiler/linker flags

[Chris Johns]

On 21/9/20 3:02 pm, Sebastian Huber wrote:
> 
> how do we want to proceed here? Without this patch the libbsd doesn't build.
> 

OK to push.

I will add a ticket for me to add a .pc file for libbsd. The remaining item was
handling the user side of things. With a .pc file that contains the flags we
have exported the config a user needs.

Chris