cmake HAVE_GTK examples

plumonito/dtslam 3rdparty/opencv-git/CMakeLists.txt :761 

elseif(HAVE_GTK)

plumonito/dtslam 3rdparty/opencv-git/modules/highgui/CMakeLists.txt :71 

elseif(HAVE_GTK OR HAVE_GTK3)

joachimBurket/esp32-opencv CMakeLists.txt :1205 

elseif(HAVE_GTK)

joachimBurket/esp32-opencv modules/highgui/CMakeLists.txt :124 

elseif(HAVE_GTK OR HAVE_GTK3)

SsageParuders/Android_Native_Surface my_android_opencv/CMakeLists.txt :1388 

elseif(HAVE_GTK)

SsageParuders/Android_Native_Surface my_android_opencv/modules/highgui/cmake/detect_gtk.cmake :35 

elseif(HAVE_GTK)