Now I have this when trying to compile with GRUB2:
configure: error: qemu, coreboot and loongson ports need build-time
grub-mkfont (need freetype2 library)
make[1]: *** [config] Error 1
make: *** [grub2] Erreur 2
Yet the freetype2 library (libsomething6) is already installed.
I don't mind using Seabios only if it's possible to use full-disk encryption
like with Libreboot.
Well at least I figured out how to boot with a liveCD. Hopefully I can
transfer the flashrom utility and the rom from a thumbdrive to the CD.
