To create a CMake file from an existing Makefile, you will need to first understand the structure and contents of the original Makefile. Then, you can begin translating this information into a CMake script.Start by examining the targets, dependencies, and commands defined in the Makefile. These will need to be converted to CMake syntax. You will also need to identify any variables, compiler flags, or special build instructions that are used in the Makefile.Next, create a new CMakeLists.