Merge topic 'file-REAL_PATH-relative'

6b5f2dbbfe file(REAL_PATH): resolve symlinks before '..' components

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Merge-request: !8605

Help/command/file.rst

@@ -981,6 +981,11 @@ Path Conversion
       if ``USERPROFILE`` is not defined.  On all other platforms, only ``HOME``
       is used.
 
+  .. versionchanged:: 3.28
+
+    All symlinks are resolved before collapsing ``../`` components.
+    See policy :policy:`CMP0152`.
+
 .. signature::
   file(RELATIVE_PATH <variable> <directory> <file>)
 

Help/manual/cmake-policies.7.rst

@@ -51,6 +51,14 @@ The :variable:`CMAKE_MINIMUM_REQUIRED_VERSION` variable may also be used
 to determine whether to report an error on use of deprecated macros or
 functions.
 
+Policies Introduced by CMake 3.28
+=================================
+
+.. toctree::
+   :maxdepth: 1
+
+   CMP0152: file(REAL_PATH) resolves symlinks before collapsing ../ components.  </policy/CMP0152>
+
 Policies Introduced by CMake 3.27
 =================================
 

Help/policy/CMP0152.rst

@@ -0,0 +1,20 @@
+CMP0152
+-------
+
+.. versionadded:: 3.28
+
+:command:`file(REAL_PATH)` resolves symlinks before collapsing ../ components.
+
+In CMake 3.27 and below, :command:`file(REAL_PATH)` collapsed any ``../``
+components in a path before resolving symlinks.  This produced incorrect
+results when the ``../`` collapsed away a symlink.
+
+The ``OLD`` behavior for this policy is to collapse ``../`` components before
+resolving symlinks.
+The ``NEW`` behavior for this policy is to resolve all symlinks before
+collapsing ``../`` components.
+
+This policy was introduced in CMake version 3.28.  Use the
+:command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly.
+
+.. include:: DEPRECATED.txt