From 98f89f90794fdded08ece4cff60fee119f28d61f Mon Sep 17 00:00:00 2001
From: RAJKIRAN NATARAJAN <saskatchewancatch@gmail.com>
Date: Sat, 2 Mar 2019 15:19:00 -0500
Subject: [PATCH] Need -DBUILD_DOCS CMake flag to build docs

Must have that flag. Otherwise following "doxygen overview" tutorial won't work.
---
 .../documenting_opencv/documentation_tutorial.markdown        | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/doc/tutorials/introduction/documenting_opencv/documentation_tutorial.markdown b/doc/tutorials/introduction/documenting_opencv/documentation_tutorial.markdown
index 0f26dafaa0..0379a3e382 100644
--- a/doc/tutorials/introduction/documenting_opencv/documentation_tutorial.markdown
+++ b/doc/tutorials/introduction/documenting_opencv/documentation_tutorial.markdown
@@ -32,11 +32,11 @@ Generate documentation {#tutorial_documentation_generate}
 -   Create build directory near the sources folder(s) and go into it
 -   Run cmake (assuming you put sources to _opencv_ folder):
     @code{.sh}
-    cmake ../opencv
+    cmake -DBUILD_DOCS=ON ../opencv
     @endcode
     Or if you get contrib sources too:
     @code{.sh}
-    cmake -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules ../opencv
+    cmake -DBUILD_DOCS=ON -DOPENCV_EXTRA_MODULES_PATH=../opencv_contrib/modules ../opencv
     @endcode
 -   Run make:
     @code{.sh}