What do you need to know about CMake scripts?
As explained in my previous post, every CMake-based project must contain a script named CMakeLists.txt. This script defines targets, but it can also do a lot of other things, such as finding third-party libraries or generating C++ header files.
Which is the root of the build directory in CMake?
Path to directory which CMake will use as the root of build directory. If the directory doesn’t already exist CMake will make it. Pre-load a script to populate the cache. When CMake is first run in an empty build tree, it creates a CMakeCache.txt file and populates it with customizable settings for the project.
Can a CMake generator support multiple build systems?
CMake may support multiple native build systems on certain platforms. A generator is responsible for generating a particular build system. Possible generator names are specified in the cmake-generators (7) manual. If not specified, CMake checks the CMAKE_GENERATOR environment variable and otherwise falls back to a builtin default selection.
Where are the build artifacts stored in CMake?
The top-level directory in which buildsystem files and build output artifacts (e.g. executables and libraries) are to be stored. CMake will write a CMakeCache.txt file to identify the directory as a build tree and store persistent information such as buildsystem configuration options.
What is the find _ package function in CMake?
The find_package command looks for scripts of the form Find*.cmake and also runs them in the same scope. Such scripts are often used to help find external libraries. For example, if there is a file named FindSDL2.cmake in the search path, find_package(SDL2) is equivalent to include(FindSDL2.cmake).
Which is CMake module speed up the build process?
Some also contain modules. cotire – Cotire (compile time reducer) is a CMake module that speeds up the build process of CMake based build systems by fully automating techniques as precompiled headers and unity builds for C and C++. [MIT] ucm – For managing compiler/linker flags, collecting sources, precompiled headers, unity builds and others.
How can you simulate a data structure in CMake?
CMake does not have classes, but you can simulate a data structure by defining a group of variables with names that begin with the same prefix. You can then look up variables in that group using nested $ {} variable references. For example, the following script will print “John Smith lives at 123 Fake St.”: