Incomplete description of building examples

libkrun$ make BLK=1 NET=1
libkrun$ sudo make BLK=1 NET=1 install
libkrun$ cd examples
libkrun/examples$ make
gcc -o boot_efi boot_efi.c -O2 -g -I../include -lkrun -lkrun_init
/usr/bin/x86_64-linux-gnu-ld.bfd: /tmp/ccMXKDu8.o: in function `listen_shutdown_request':
libkrun/examples/boot_efi.c:172:(.text+0x12a): undefined reference to `krun_vmm_handle_shutdown'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:175:(.text+0x159): undefined reference to `krun_error_destroy'
/usr/bin/x86_64-linux-gnu-ld.bfd: /tmp/ccMXKDu8.o: in function `main':
libkrun/examples/boot_efi.c:200:(.text.startup+0x5a): undefined reference to `krun_init_log'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:203:(.text.startup+0x6b): undefined reference to `krun_mmio_device_manager_new'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:207:(.text.startup+0x73): undefined reference to `krun_console_device_builder'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:208:(.text.startup+0x95): undefined reference to `krun_console_builder_add_default_console'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:209:(.text.startup+0xac): undefined reference to `krun_console_builder_build'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:210:(.text.startup+0xb7): undefined reference to `krun_mmio_device_manager_add'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:214:(.text.startup+0xec): undefined reference to `krun_payload_load_firmware'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:217:(.text.startup+0x12e): undefined reference to `krun_block_device_new'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:219:(.text.startup+0x150): undefined reference to `krun_mmio_device_manager_add'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:224:(.text.startup+0x1af): undefined reference to `krun_net_device_new_unixgram_path'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:227:(.text.startup+0x1ca): undefined reference to `krun_mmio_device_manager_add'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:231:(.text.startup+0x1d9): undefined reference to `krun_rng_device_new'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:232:(.text.startup+0x1f0): undefined reference to `krun_mmio_device_manager_add'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:234:(.text.startup+0x1ff): undefined reference to `krun_balloon_device_new'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:235:(.text.startup+0x216): undefined reference to `krun_mmio_device_manager_add'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:239:(.text.startup+0x21b): undefined reference to `krun_vmm_builder_new'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:240:(.text.startup+0x239): undefined reference to `krun_vmm_builder_vcpus'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:241:(.text.startup+0x257): undefined reference to `krun_vmm_builder_ram_mib'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:242:(.text.startup+0x270): undefined reference to `krun_vmm_builder_payload'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:243:(.text.startup+0x27d): undefined reference to `krun_vmm_builder_devices'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:245:(.text.startup+0x291): undefined reference to `krun_vmm_builder_build'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:248:(.text.startup+0x2ab): undefined reference to `krun_vmm_handle'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:254:(.text.startup+0x2d5): undefined reference to `krun_vmm_run'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:200:(.text.startup+0x36a): undefined reference to `krun_error_message'
/usr/bin/x86_64-linux-gnu-ld.bfd: libkrun/examples/boot_efi.c:200:(.text.startup+0x391): undefined reference to `krun_error_destroy'
collect2: error: ld returned 1 exit status
make: *** [Makefile:41: boot_efi] Error 1

make FEATURE_FLAGS="--features ffi,blk,net,vhost-user"