Once you make a debug build, you can run a debugger, such as gdb or lldb on it. There are distinct flags for this mode (variables ending in _DEBUG as opposed to _RELEASE), as well as a generator expression value CONFIG:Debug or CONFIG:Release. In multi-configuration generators, like many IDEs, you can pick the configuration in the IDE. The library can be built as static or shared and can be installed with cmake -install. It provides an API for drawing primitives using OpenGL onto a GLFW window, using functions like void kayceecreatewindow () and void kayceedrawcube (). Building in debug modeįor single-configuration generators, you can build your code with -DCMAKE_BUILD_TYPE=Debug to get debugging flags. 1 I am building a small C library called Kaycee. If you add -trace-expand, the variables will be expanded into their values. There are related options as well, but they tend to bury you in output.įor example: cmake -S. This applies whether the old name is for a built-in command, a custom function or a macro. Every line run in the file that you give will be echoed to the screen when it is run, letting you follow exactly what is happening. When function () or macro () is called to define a new command, if a command already exists with that name, the undocumented CMake behavior is to make the old command available using the same name except with an underscore prepended. 2 How to build GLEW as part of the CMake project. Have you wanted to watch exactly what happens in your CMake file, and when? The -trace-source="filename" feature is fantastic. Generate in CMake header-only library that 'stores' its dependency on boost filesystem. If you want to print out a property, this is much, much nicer! Instead of getting the properties one by one of of each target (or other item with properties, such as SOURCES, DIRECTORIES, TESTS, or CACHE_ENTRIES - global properties seem to be missing for some reason), you can simply list them and get them printed directly: cmake_print_properties( However, a built in module makes this even easier: include(CMakePrintHelpers) A function to plot the result of the timer to. The time honored method of print statements looks like this in CMake: message(STATUS "MY_VARIABLE=$") Part 4 : Several useful CMake functions A function to lauch automatically the programs to be timed (runExample). CMake debuggingįirst, let's look at ways to debug a CMakeLists or other CMake file. The CMake docs splits expressions into Informational, Logical, and Output.You might need to debug your CMake build, or debug your C++ code. They act as if they are evaluated at build/install time, though actually they are evaluated for each build configuration. The in the function definition are recorded they are not executed until the function is invoked. ) endfunction () Defines a function named that takes arguments named .You can mix it with the positional arguments listed above any remaining arguments (therefore optional positional arguments) are in COMPLEX_PREFIX_UNPARSED_ARGUMENTS. function CMake 3.26.3 Documentation function Start recording a function for later invocation as a command. If you look at the official page, you'll see a slightly different method using set to avoid explicitly writing the semicolons in the list feel free to use the structure you like best. So, if you set a variable in a function and want it to be visible outside, you'll need PARENTSCOPE. The only difference between a function and a macro is scope macros don't have one. Inside the function after this call, you'll find: COMPLEX_PREFIX_SINGLE = TRUEĬOMPLEX_PREFIX_MULTI_VALUES = "some other values" You can define your own CMake function or macro easily. There are a series of all caps keywords you can use inside an if statement, and you can often refer to variables by either directly by name or using the $Ĭomplex(SINGLE ONE_VALUE value MULTI_VALUES some other values) CMake has an if statement, though over the years it has become rather complex.
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