The error I got was:

  CC       pie/piegen/elf-x86-64.o
In file included from pie/piegen/elf-x86-32.c:16:0:
pie/piegen/elf.c: In function ‘handle_elf_x86_32’:
pie/piegen/elf.c:476:3: error: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 6 has type ‘Elf32_Word’ [-Werror=format=]
   pr_debug("Copying section '%s'\n" \
   ^
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>