當編譯遇到缺包問題後：

如：

Program xmlto found: NO

doc/meson.build:4:0: ERROR: Program 'xmlto' not found or not executable

根據提示資訊：

在ubuntu下使用

apt-cache search  xxx

上面例子可以使用  ：sudo apt-cache search xmlto

libocct-ocaf-7.5 - Open CASCADE Technology application-specific data and functionality
liboce-ocaf11 - OpenCASCADE Community Edition CAE platform shared library
libxmltok1 - XML Parser Toolkit, runtime libraries
libxmltok1-dev - XML Parser Toolkit, developer libraries
libxmltooling-dev - C++ XML parsing library with encryption support (development)
libxmltooling-doc - C++ XML parsing library with encryption support (API docs)
libxmltooling10 - C++ XML parsing library with encryption support (runtime)
python3-xmltodict - Makes working with XML feel like you are working with JSON (Python 3)
xmlto - XML-to-any converter
xmltoman - simple XML to man converter
xmltooling-schemas - XML schemas for XMLTooling　　

然後找到相應的包安裝即可

sudo apt install xxx

上面例子找到然後執行

sudo apt install xmlto

如果上述方法沒有用，那麼只能上網下載所需的包進行編譯安裝。