From e8a520ed9662747970fd6b03fe742f116d93c83b Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Sat, 9 Jun 2018 12:48:26 +0300
Subject: [PATCH] cmake: add BUILD_APPS_LIST

- build "opencv_version" only: `cmake -DBUILD_APPS_LIST=version ...`
- option 'BUILD_opencv_apps' should be 'ON'
---
 apps/CMakeLists.txt | 25 +++++++++++++++++++------
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index ed663752dd..95e98e6e08 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -3,9 +3,22 @@ add_definitions(-D__OPENCV_APPS=1)
 
 link_libraries(${OPENCV_LINKER_LIBS})
 
-add_subdirectory(traincascade)
-add_subdirectory(createsamples)
-add_subdirectory(annotation)
-add_subdirectory(visualisation)
-add_subdirectory(interactive-calibration)
-add_subdirectory(version)
+macro(ocv_add_app directory)
+  if(DEFINED BUILD_APPS_LIST)
+    list(FIND BUILD_APPS_LIST ${directory} _index)
+    if (${_index} GREATER -1)
+      add_subdirectory(${directory})
+    else()
+      message(STATUS "Skip OpenCV app: ${directory}")
+    endif()
+  else()
+    add_subdirectory(${directory})
+  endif()
+endmacro()
+
+ocv_add_app(traincascade)
+ocv_add_app(createsamples)
+ocv_add_app(annotation)
+ocv_add_app(visualisation)
+ocv_add_app(interactive-calibration)
+ocv_add_app(version)