ALLOW_DUPLICATE_CUSTOM_TARGETS

ALLOW_DUPLICATE_CUSTOM_TARGETS

Allow duplicate custom targets to be created.

Normally CMake requires that all targets built in a project have globally unique logical names (see policy :policy:CMP0002). This is necessary to generate meaningful project file names in :generator:Xcode and :ref:Visual Studio Generators IDE generators. It also allows the target names to be referenced unambiguously.

Makefile generators are capable of supporting duplicate :command:add_custom_target names. For projects that care only about :ref:Makefile Generators and do not wish to support :generator:Xcode or :ref:Visual Studio Generators IDE generators, one may set this property to True to allow duplicate custom targets. The property allows multiple :command:add_custom_target command calls in different directories to specify the same target name. However, setting this property will cause non-Makefile generators to produce an error and refuse to generate the project.