One way for a user to set a different value for BL would be on the cmake command line. However, without a FORCE option in the set statement, that means that it will not be overwritten if the variable was previously defined in the cache. Depending on the project size and the number of libraries used it may be preferable to use the config_file() approach as this will keep the call to the compiler small. The code set (BL 'Ei' CACHE STRING 'library') defines a CMake cache variable. Which method to take? does not have a big impact. I should draw the reader's attention that this is not the only cmake command cable of adding compilation definitions as you may read in this link. Set (VERSION_MAJOR 0) set (VERSION_MINOR 1) set (VERSION_PATCH 0) # generate version.h replacing all configure_file (version.h.in $ main.cpp) The following CMakeLists.txt file shows how to set them: cmake_minimum_required (VERSION 3.2) For our tutorial, it is sufficient to have them of normal type. All variables with the decoration will be replaced with their values given in the CMakeLists.txtfile.Ĭmake variables can be defined in the CMakeLists.txt using the set() command. h header file that contains the definition of the project version. The idea behind the first method is to use configure_file() command to copy an input file to another location and modify its content. So how can we avoid defining the project version in multiple locations? In the code (if we need it there), in the build system or the source packaging. Doing things this way leaves us with the problem of maintaining these variables at the code level instead of aggregating this task to the build system. This header file can then be included to make variables available for various uses. The simplest way of defining a project version is by defining a header file containing the version components as global variables. This page talks about the available options and how they are used. Details on the meaning of each number go out of this article's scope but it can be checked on this link. CMake Tools supports a variety of settings that can be set at the user or workspace level via VSCode’s settings.json file. ![]() Semantic versioning which is one of the popular methods used to version software gives the project a version number composed of 3 components: Major, Minor and the patch. This article will give an overview of both methods. Click on the Run button and execute cmake -P set.cmake command in the terminal. ![]() This can be easily done by defining the version components as either, cmake variables or as definitions to the compiler command line. To set a variable, we simply call set(), providing its name and the value. One of the applications that Cmake facilitates, is configuring the project version from within a CMakeLists.txt file. Cmake is a wonderful tool for generating building systems for projects.
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