To fetch and compile the Linux kernel sources and additional bce, apple-ibridge, apple-ib-tb, and apple-ib-als modules, just call make.
To install the artifacts just call sudo make install.
The Linux kernel image vmlinuz-linux and initramfs-linux.img file are located after the install
at the path /boot/linux-mba and all the compiled Linux kernel modules at the path /lib/modules/5.1.5-mba+/.