Merge topic 'findx11-imported-targets'

bced9d5e56 Tests/FindX11: add a test
a7d2ffb232 FindX11: add imported targets
40b3dba529 FindX11: require Freetype and Fontconfig for Xft
cc96249e2e FindX11: remove local variable from the advanced list
99489d9f10 FindX11: find Xext.h
b8b598061a FindX11: match variables with library names
6079a0d00f FindX11: fix some formatting in the documentation
3c54955d0d FindX11: use `list(APPEND)` for clearer code
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2604

Help/release/dev/FindX11-imported-targets.rst

@@ -0,0 +1,32 @@
+FindX11-imported-targets
+------------------------
+
+* The :module:`FindX11` had the following variables renamed in order to match
+  their library names rather than header names. The old variables are provided
+  for compatibility:
+
+    - ``X11_Xxf86misc_INCLUDE_PATH`` instead of ``X11_xf86misc_INCLUDE_PATH``
+    - ``X11_Xxf86misc_LIB`` instead of ``X11_xf86misc_LIB``
+    - ``X11_Xxf86misc_FOUND`` instead of ``X11_xf86misc_FOUND``
+    - ``X11_Xxf86vm_INCLUDE_PATH`` instead of ``X11_xf86vmode_INCLUDE_PATH``
+    - ``X11_Xxf86vm_LIB`` instead of ``X11_xf86vmode_LIB``
+    - ``X11_Xxf86vm_FOUND`` instead of ``X11_xf86vmode_FOUND``
+    - ``X11_xkbfile_INCLUDE_PATH`` instead of ``X11_Xkbfile_INCLUDE_PATH``
+    - ``X11_xkbfile_LIB`` instead of ``X11_Xkbfile_LIB``
+    - ``X11_xkbfile_FOUND`` instead of ``X11_Xkbfile_FOUND``
+    - ``X11_Xtst_INCLUDE_PATH`` instead of ``X11_XTest_INCLUDE_PATH``
+    - ``X11_Xtst_LIB`` instead of ``X11_XTest_LIB``
+    - ``X11_Xtst_FOUND`` instead of ``X11_XTest_FOUND``
+    - ``X11_Xss_INCLUDE_PATH`` instead of ``X11_Xscreensaver_INCLUDE_PATH``
+    - ``X11_Xss_LIB`` instead of ``X11_Xscreensaver_LIB``
+    - ``X11_Xss_FOUND`` instead of ``X11_Xscreensaver_FOUND``
+
+  The following variables are deprecated completely since they were
+  essentially duplicates:
+
+    - ``X11_Xinput_INCLUDE_PATH`` (use ``X11_Xi_INCLUDE_PATH``)
+    - ``X11_Xinput_LIB`` (use ``X11_Xi_LIB``)
+    - ``X11_Xinput_FOUND`` (use ``X11_Xi_FOUND``)
+
+* The :module:`FindX11` now provides ``X11_Xext_INCLUDE_PATH``.
+* The :module:`FindX11` now provides imported targets.