Cmake Set Variable Global

How can i correctly set the global variable source list in the function test. Even if this is not nice sometimes you need to have a global variable. It s typically used to define a common set of functions or macros in the calling script.

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Customize Cmake Build Settings In Visual Studio Microsoft Docs

Signatures of this command that specify a value.

Cmake set variable global. 1 is this the real use case for cache so to use it as a global variables container. Ignored on other generators. Variables and the global variables cache. In my understanding this is something that is intended to use if you would.

It s a lot like the include directive in c c. While you can use the parent scope parameter to increase the scope of a local variable by one layer that mostly makes sense for return values of functions. Tell the visual studio generator to set the global variable variable to a given value in the generated visual studio project. It uses the variable cmake module path as a search path.

I have a folder on my system that contains many useful include folders and files for many of my c projects. Can t cmake do it in a simple and normal way. For example 4. At last the source list is nothing someone suggested that to use macro instead of function but i do need use local variable so i need to use the function instead of macro.

Qt integration works better if vs global qtversion is set to the version findqt4 cmake found. Or use a gui. Cmake variables are defined at file scope. All variables in cmake are local by default.

Set a normal cache or environment variable to a given value. Once the find script is called by anyone you want the results to be available everywhere. Hi community i could not found any other possibilites to set some global variable than using a cache variable. So i would like to ask about advice in this area.

Placeholder expect zero or more arguments. Vs global variable visual studio project specific global variable. This is so common you can also use the internal type to do the same thing though technically it forces the string type this won t affect any cmake code that depends on the variable. Mostly you will use normal variables.

Cmake local variable example set my variable the value is a string by default a local variable is only defined in the current directory and any subdirectories added through the add subdirectory command. Set var true set var main cpp set var1 var2 but cmake does also know global cached variables persisted in cmakecache txt and if normal and cached variables of the same name exist in the current scope normal variables do hide the cached ones. For find scripts on the other hand you usually want the behavior of a global variable. Multiple arguments will be joined as a semicolon separated list to form the actual variable value to be set.

To extend the scope of a. The first line will cause the value to be set no matter what and the second line will keep the variable from showing up in the list of variables if you run cmake l. I am wondering if there is a way to set a global variable except it can be used with other projects that don t initially declare it. The include command executes another cmake script in the same scope as the calling script.

See the cmake language 7 variables documentation for the scopes and interaction of normal variables and cache entries.