Update README for building error: No CMAKE_CXX_COMPILER could be found

README.md

@@ -23,9 +23,16 @@ For user manual, system design and architecture, engineering blogs, refer to [TD
 # Building
 At the moment, TDengine only supports building and running on Linux systems. You can choose to [install from packages](https://www.taosdata.com/en/getting-started/#Install-from-Package) or from the source code. This quick guide is for installation from the source only.
 
-To build TDengine, use [CMake](https://cmake.org/) 2.8 or higher versions in the project directory:
+To build TDengine, use [CMake](https://cmake.org/) 2.8 or higher versions in the project directory.
 
+Install CMake for example on Ubuntu:
+```
+sudo apt-get install -y cmake build-essential
+```
+
+Build TDengine:
 ```cmd
+
 mkdir build && cd build
 cmake .. && cmake --build .
 ```