Disallow add_custom_command SOURCE signatures.
CMake 2.8.12 and lower allowed a signature for
add_custom_command() which specified an input to a command. This was undocumented behavior. Modern use of CMake associates custom commands with their output, rather than their input.
OLD behavior for this policy is to allow the use of
add_custom_command() SOURCE signatures. The
NEW behavior for this policy is to issue an error if such a signature is used.
This policy was introduced in CMake version 3.0. CMake version 3.15.2 warns when the policy is not set and uses
OLD behavior. Use the
cmake_policy() command to set it to
OLD behavior of a policy is
deprecated by definition and may be removed in a future version of CMake.
© 2000–2019 Kitware, Inc. and Contributors
Licensed under the BSD 3-clause License.