CMake: Read build number from file to set a variable

Question

I\'m working on a project where the build number is stored in a file called \'BuildNumber.txt\' at the root of the project. What I\'d like to do is have CMake read the numb

Answer 1

You can use the CMake command file (STRINGS ...) for that purpose. Assuming the build number is located in the file BuildNumber.txt in a single line, the following command will read it into the CMake variable BUILD_NUMBER:

file (STRINGS "BuildNumber.txt" BUILD_NUMBER)

Also see the file command reference.