CMP0110

add_test() supports arbitrary characters in test names.

add_test() can now (officially) create tests with whitespace and other special characters in its name. Before CMake version 3.19 that was not allowed, however, it was possible to work around this limitation by explicitly putting escaped quotes arount the test’s name in the add_test command.

Although never officially supported several projects in the wild found and implemented this workaround. However, the new change which officially allows the add_test command to support whitespace and other special characters in test names now breaks that workaround. In order for these projects to work smoothly with newer CMake versions, this policy was introduced.

The OLD behavior of this policy is to still prevent add_test from handling whitespace and special characters properly (if not using the mentioned workaround). The NEW behavior on the other hand allows names with whitespace and special characters for tests created by add_test.

This policy was introduced in CMake version 3.19. CMake version 3.19.0-rc3 warns when the policy is not set and uses OLD behavior. Use the cmake_policy() command to set it to OLD or NEW explicitly.