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Help: Add explicit <PackageName>_ROOT variable documentation

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Add documentation for both the CMake variable and environment variable
of this name pattern.  Update references to these names to link to their
documents.  Clarify the pattern used to construct their names.
This commit is contained in:
Brad King
2018-07-19 14:19:42 -04:00
parent f84c15ef2f
commit 492ade276b
10 changed files with 64 additions and 23 deletions
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Help/release/3.12.rst
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@@ -46,8 +46,9 @@ Commands
were added to expose ``TOUCH`` functionality without having to use
CMake's command-line tool mode with :command:`execute_process`.
* The :command:`find_package` command now searches a prefix specified by
a ``PackageName_ROOT`` CMake or environment variable. Package roots are
* The :command:`find_package` command now searches prefixes specified by
the :variable:`<PackageName>_ROOT` CMake variable and the
:envvar:`<PackageName>_ROOT` environment variable. Package roots are
maintained as a stack so nested calls to all ``find_*`` commands inside
find modules also search the roots as prefixes.
See policy :policy:`CMP0074`.