Cmake Set Variable Global

The include command executes another cmake script in the same scope as the calling script.

Cmake set variable global. It s a lot like the include directive in c c. To extend the scope of a. 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. 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.

Signatures of this command that specify a value. 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. Tell the visual studio generator to set the global variable variable to a given value in the generated visual studio project.

Multiple arguments will be joined as a semicolon separated list to form the actual variable value to be set. 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. For find scripts on the other hand you usually want the behavior of a global variable. Or use a gui.

It s typically used to define a common set of functions or macros in the calling script. Variables and the global variables cache. Cmake variables are defined at file scope. How can i correctly set the global variable source list in the function test.

Once the find script is called by anyone you want the results to be available everywhere. For example 4. Placeholder expect zero or more arguments. 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.

See the cmake language 7 variables documentation for the scopes and interaction of normal variables and cache entries. 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. Mostly you will use normal variables. Vs global variable visual studio project specific global variable.

It uses the variable cmake module path as a search path. I e despite the existence of target compile options if you need to add compiler options only to a c compile you ll still have to use cmake cxx flags. Ignored on other generators. 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.

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. Set a normal cache or environment variable to a given value.