So every module must have its own compilation procedure. In other word, we want to divide the compilation process into little compilation steps, each belong to one module. This idea would propagate in compiling process too. Like code encapsulation, re usability, easier debugging etc. We want to separate our code into modules and libraries for many reasons. Though gave a good answer to this question, I believe it is more proper to approach it more in depth. You manually have to re-create your build files then. One drawback with computing the set of source files is that CMake will not automatically detect when new files are added to your source tree. The CONFIGURE_DEPENDS flags tells CMake to re-run the glob command at build time. The foreach loop computes the set of include directories from the list of all header files. commands determine the set of source and header files. The following CMake file may serve as a starting point: cmake_minimum_required(VERSION 3.12)įile (GLOB_RECURSE Foo_SOURCES CONFIGURE_DEPENDS "src/*.cpp")įile (GLOB_RECURSE Foo_HEADERS CONFIGURE_DEPENDS "src/*.h") Since the directory structure in your project is just there to keep your files organized, one approach is to have a CMakeLists.txt that automatically finds all sources files in the src directory and also adds all directories as include directories that have a header file in them. How can I structure my CMakeLists.txt files to handle this sort of structure? Short of combing my source files to determine which file depends on which and in what directory, is there anyway to just set all directories under /src/ as potential include directories and let CMake work out which ones are actually dependent? ![]() ![]() How can I construct my CMakeLists.txt files to deal with this? Making the directories libraries doesn't seem to fit here, since they are all interdependent and not intended to be used that way.Īs a related issue, most of the examples I've seen of multiple subdirectories in CMake (and there aren't very many of those) have ignored or glossed over the issue of setting include_directories, which is something I've been having trouble with. Directories are not intended to be self-sufficient elements, but rather just a way of organizing the whole of the project and keeping me from being overwhelmed by sources. Using our sample HelloLunch project the contents of the root level CMakeLists.txt is shown below.I have a C++ project where I've used directories as more of an organizational element - the way one might use packages in Java or directories in PHP. ![]() For a full working program review the KitchenSink demo build files which is available on github and from our CopperSpice download page. This is a fictitious project intended to show the syntax for building a CopperSpice project. Modified per project, contains a list of source files and libraries This is the third file shown in the table below. If there are additional subdirectories below the main source directory the CMake file is usually named after the folder. This is the second file shown in the table below. If your source files are located in a subdirectory it is common to use a separate CMake build file in the src subdirectory. Building a project using CMake requires at least one CMakeLists.txt file in the root of your project.
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