CMP0074 — CMake 4.0.1 Documentation (original) (raw)

Added in version 3.12.

find_package() uses <PackageName>_ROOT variables.

In CMake 3.12 and above the find_package() command now searches prefixes specified by the _ROOT CMake variable and the _ROOT environment variable. Package roots are maintained as a stack so nested calls to all find_*commands inside find modules and config packages also search the roots as prefixes. This policy provides compatibility with projects that have not been updated to avoid using <PackageName>_ROOT variables for other purposes.

The OLD behavior for this policy is to ignore <PackageName>_ROOTvariables. The NEW behavior for this policy is to use<PackageName>_ROOT variables.

This policy was introduced in CMake version 3.12. It may be set by cmake_policy() or cmake_minimum_required(). If it is not set, CMake warns, and uses OLD behavior.