Depends Item
A Depends item can appear inside a Product Item or Module Item.
For example, the following product will load the cpp module. In addition, it will try to load modules that may or may not exist, and in the latter case use a fallback.
  Product {
      Depends { name: "cpp" }
      Depends {
          name: "awesome_module"
          versionAtLeast: "2.0"
          required: false
      }
      Depends {
          name: "adequate_module"
          condition: !awesome_module.present
          required: false
      }
      Depends {
          name: "inferior_module"
          condition: !awesome_module.present && !adequate_module.present
      }
      // ...
  }
Dependency Parameters
Sometimes it is desirable to have certain dependencies handled differently than others. For example, one might want to depend on a dynamic library without linking it.
This can be done by setting the parameter cpp.link to true in the dynamic library dependency:
  Product {
      Depends { name: "cpp" }
      Depends { name: "some_dynamic_lib"; cpp.link: false }
      // ...
  }
Dependency parameters are a special type of property that can only be set within Depends and Parameters items. Dependency parameters are declared in the modules they belong to.
In the example above, the cpp module declares the parameter link. The Depends item for some_dynamic_lib sets cpp.link to false, which tells the linker rule to ignore this particular dependency.
Depends Properties
| Property | Type | Default | Description | 
|---|---|---|---|
| condition | bool | true | Determines whether the dependency will actually be applied. | 
| versionAtLeast | string | undefined | The minimum value that the dependency's versionproperty needs to have. If the actual version is lower than that, loading the dependency will fail. The value consists of integers separated by dots. | 
| versionBelow | string | undefined | A value that the dependency's versionproperty must be lower than. If the actual version is equal to or higher than that, loading the dependency will fail. The value consists of integers separated by dots. | 
| productTypes | stringList | undefined | A list of product types. Any enabled product in the project that has a matching type will become a dependency of the product containing the Dependsitem. This property is mutually exclusive with thenameandsubmodulesproperties. Therequiredandprofilesproperties are ignored ifproductTypesis set. | 
| required | bool | true | Setting this property to falsecreates a soft dependency, meaning that it is not considered an error if the given module cannot be found. In such a case, an instance of the respective module will be created, but only thepresentproperty will be available for querying, and it will be set tofalse. | 
| name | string | undefined | The name of the dependent product or module. | 
| profiles | stringList | [product.profile] | If the dependency is on a product and that product is going to be built for more than one profile, then you can specify here which instance of the product the dependency is on. See the profilesproperty of theProductitem for more information. An empty list means a dependency on all instances of the product with the given name, regardless of their profile. | 
| limitToSubProject | bool | false | If productTypesis set and this property istrue, then only products that are in the same sub-project as the product containing theDependsitem are considered. | 
| submodules | stringList | undefined | The submodules of moduleto depend on, if applicable. |