![]() (Note that there are several ways to use the find_package command – this is just one of them. For example, if there is a file named FindSDL2.cmake in the search path, find_package(SDL2) is equivalent to include(FindSDL2.cmake). Such scripts are often used to help find external libraries. The find_package command looks for scripts of the form Find*.cmake and also runs them in the same scope. Generally prefer the list () command for handling lists. Setting this property for a file means this file will be compiled. If it is not set the language is determined based on the file extension. The recommendation is that you always use quotation marks with the one exception when you want to give a list as list. A property that can be set to indicate what programming language the source file is. set (MyVar a b c) is 'a b c' and set (MyVar 'a b c') is 'a b c'. It uses the variable CMAKE_MODULE_PATH as a search path. Lists in CMake are just strings with semicolons delimiters and therefore the quotation-marks are important. See properties documentation for those known to CMake. It’s typically used to define a common set of functions or macros in the calling script. Set properties associated with source files using a key/value paired list. It’s a lot like the #include directive in C/C++. The include command executes another CMake script in the same scope as the calling script. You can substitute a variable inside a string literal by surrounding it with $ * 2") # Double ARG's numeric value store result in NĭoubleEach(5 6 7 8) # Prints 10, 12, 14, 16 on separate linesĬMake variables are defined at file scope. (The -P option runs the given script, but doesn’t generate a build pipeline.) As expected, it prints “Hello world!”. ![]() setsourcefilesproperties Source files can have. Source file properties are visible only to targets added in the same directory (CMakeLists.txt). ![]() See Properties on Source Files for the list of properties known to CMake. …you can run it from the command line using cmake -P hello.txt. Set properties associated with source files using a key/value paired list. If you create a file named hello.txt with the following contents: message("Hello world!") # A message to print This post won’t cover all of CMake’s built-in commands, as there are hundreds, but it is a fairly complete guide to the syntax and programming model of the language. The goal of this post is to get you to the same point as quickly as possible. I spent a long time editing CMake scripts without really understanding the language, as the documentation is quite scattered, but eventually, things clicked. CMake scripts have a lot of flexibility.Įvery time you integrate an external library, and often when adding support for another platform, you’ll need to edit the script. 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. As explained in my previous post, every CMake-based project must contain a script named CMakeLists.txt.
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