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 number from this file and set a variable that can be applied to a header file.
setup.h.in
#define build_number "@BUILD_NUMBER@";
Using configure_file, it's possible to replace placeholders in an .in file like above with a CMake variable. Is it possible to get CMake to read in the number from BuildNumber.txt into a variable?
You can use the CMake command
file (STRINGS ...)
for that purpose. Assuming the build number is located in the fileBuildNumber.txt
in a single line, the following command will read it into the CMake variableBUILD_NUMBER
:Also see the file command reference.