$ make efi-x86_payload32_defconfig all -j12
$ file u-boot
u-boot: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), statically linked, not stripped
$ bloaty u-boot
bloaty: Tried to add range that is not covered by base map.
$ gcc --version
gcc (Ubuntu 7.3.0-21ubuntu1~16.04) 7.3.0