./scripts/installErizo.sh error with Ubuntu 18.10 \n \l

when i run ‘./scripts/installErizo.sh’ ,i get this messages,why? someone can help me?

liyibo@liyibo-VirtualBox:~/桌面/licodedemo1/licode/scripts$ ./installErizo.sh
Installing erizo…
generating release
– Could NOT find PkgConfig (missing: PKG_CONFIG_EXECUTABLE)
– The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:14 (project):
No CMAKE_CXX_COMPILER could be found.

Tell CMake where to find the compiler by setting either the environment
variable “CXX” or the CMake cache entry CMAKE_CXX_COMPILER to the full path
to the compiler, or to the compiler name if it is in the PATH.

– Configuring incomplete, errors occurred!
See also “/home/liyibo/桌面/licodedemo1/licode/erizo/build/release/CMakeFiles/CMakeOutput.log”.
See also “/home/liyibo/桌面/licodedemo1/licode/erizo/build/release/CMakeFiles/CMakeError.log”.

As per the documentation Ubuntu 14.04 is the only officially supported OS but support for Ubuntu 16.04 has been added recently. Personally I’ve not tested on Ubuntu 18.