How to create variables for use in Xcode build settings values?

XCode has a number of built-in variables that are used for convenience in Build Settings, for example "$(PRODUCT_NAME)" or "$(CURRENT_ARCH)".

Can I define my own variables? How / where?

Solution 1:

In XCode 5 this has changed slightly.

1. Select the project or target in the left side of the editor
2. Go to the Editor menu in the top menu bar
3. Select "Add Build Setting" and then "Add User-Defined Build Setting"

Solution 2:

Create a user-defined build setting. To create one in Xcode 4 select your project from the project navigator to open the project editor. Select your project or target from the left side of the editor. Click the Build Settings button at the top of the editor. Click the Add Build Setting button at the bottom of the editor and choose Add User-Defined Setting.

Solution 3:

It's at the top of the build settings panel in Xcode 10.