vtpm平台的qemu-tpm安装

我在ubuntu18.04上安装qemu-tpm是采用这条命令的时候./configure --enable-kvm --enable-tpm --enable-sdl 报这个错误../meson.build:3070:18: ERROR: Subproject exists but has no meson.build file

A full log can be found at /home/qlq/qemu-tpm/build/meson-logs/meson-log.txt

ERROR: meson setup failed

但是我在目录下看见了

这个怎么解决呢