<PackageName>_ROOT

在 3.12 版被加入.

這是一個 CMake 環境變數。其初始值取自呼叫進程的環境。

Calls to find_package(<PackageName>) will search in prefixes specified by the <PackageName>_ROOT environment variable, where <PackageName> is the (case-preserved) name given to the find_package() call and _ROOT is literal. For example, find_package(Foo) will search prefixes specified in the Foo_ROOT environment variable (if set). See policy CMP0074.

該變數可持有單一前綴或者以 UNIX 上的 : 或 Windows 上的 ; 分隔的前綴列表（與這些平臺上的 PATH 環境變數慣例相同）。

另請參見 <PackageName>_ROOT CMake 變數。

<PACKAGENAME>_ROOT

在 3.27 版被加入.

Calls to find_package(<PackageName>) will also search in prefixes specified by the upper-case <PACKAGENAME>_ROOT environment variable. See policy CMP0144.

備註

Note that the <PackageName>_ROOT and <PACKAGENAME>_ROOT environment variables are distinct only on platforms that have case-sensitive environments.