![]() Most of these are only generated on demand and will not appear in a simple project such as the one from your question. Generated files - This can be anything from autogenerated source files to export macros that help you re-integrate your built project with other CMake projects.This can be useful to look at from time to time, but I would recommend to use the aforementioned tools for changing any of the values if possible. The list of variables is mostly identical to the one you see when running ccmake or cmake-gui. Values stored in here can be paths to library dependencies or whether an optional component is to be built at all. CMakeCache.txt - This is a persistent key/value string storage which is used to cache value between runs.This can be anything from a Unix Makefile to a Visual Studio solution. Project files/Makefiles - What you are actually interested in: The files required to build your project under the selected generator.To ease your pain, let me give a quick overview of the relevant files which CMake generates: I usually use an empty subfolder build inside my source directory as build directory. Mixing the build and source directory is really painful with CMake and is not how the system is supposed to be used. ), please check them out before proceeding. If you didn't do this so far (which I guess is the case, since you wrote cmake. The good news is that CMake does a good job of keeping a lot of this messiness away from you: Use out-of-source builds and you don't even have to look at the generated files. The secret is that you don't have to understand what the generated files do.ĬMake introduces a lot of complexity into the build system, most of which only pays off if you use it for building complex software projects. , what exactly is cmake configuring and generating before it builds the project? If anyone knows, could you please explain it for the sake of posterity? What is the purpose of these files, and when I type cmake. Not understanding what was going on behind the scenes (i.e: why so may files had to be generated and what their purpose was), was the biggest obstacle in being able to learn CMake. ![]() There are so many files generated CMakeCache.txt cmake_install.cmake MakefileĪnd a CMakeFiles folder with so many files and folders CMakeCCompiler.cmake CMakeOutput.log Makefile.cmakeĬmake.check_cache CMakeSystem.cmake progress.marksĬMakeCXXCompiler.cmake CMakeTmp TargetDirectories.txtĬMakeDetermineCompilerABI_C.bin CompilerIdC Tutorial.dirĬMakeDetermineCompilerABI_CXX.bin CompilerIdCXXĬMakeDirectoryInformation.cmake Makefile2 I hope this question will be a reference for the many newbies who like me, found it utterly perplexing about what exactly what was going on behind the scenes when for such a small CMakeLists.txt file cmake_minimum_required (VERSION 2.6)Īnd such a small tutorial.cpp int main()
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