From ce2d856a516a592cf6c123d2862e9bbdaa4d6926 Mon Sep 17 00:00:00 2001
From: Howard Pritchard <hppritcha@gmail.com>
Date: Mon, 7 Dec 2020 13:53:45 -0700
Subject: [PATCH] CMAKE: add option to not use QT

Signed-off-by: Howard Pritchard <hppritcha@gmail.com>

diff --git a/config/vendor_libraries.cmake b/config/vendor_libraries.cmake
index 5a3e9d0c..8782170d 100644
--- a/config/vendor_libraries.cmake
+++ b/config/vendor_libraries.cmake
@@ -318,22 +318,27 @@ endmacro()
 macro( setupQt )
   message( STATUS "Looking for Qt SDK...." )
 
-  # Find the QtWidgets library
-  find_package(Qt5 COMPONENTS Widgets QUIET)
+  option (USE_QT "Build QT support for Draco" ON)
 
-  if( Qt5Core_DIR )
-    mark_as_advanced( Qt5Core_DIR Qt5Gui_DIR Qt5Gui_EGL_LIBRARY
-      Qt5Widgets_DIR QTDIR)
-    message( STATUS "Looking for Qt SDK....found ${Qt5Core_DIR}" )
-  else()
-    message( STATUS "Looking for Qt SDK....not found." )
-  endif()
+  if( USE_QT )
+    # Find the QtWidgets library
+    find_package(Qt5 COMPONENTS Widgets QUIET)
 
-  set_package_properties( Qt PROPERTIES
-    URL "http://qt.io"
-    DESCRIPTION "Qt is a comprehensive cross-platform C++ application framework."
-    TYPE OPTIONAL
-    PURPOSE "Only needed to demo qt version of draco_diagnostics." )
+    if( Qt5Core_DIR )
+      mark_as_advanced( Qt5Core_DIR Qt5Gui_DIR Qt5Gui_EGL_LIBRARY
+        Qt5Widgets_DIR QTDIR)
+      message( STATUS "Looking for Qt SDK....found ${Qt5Core_DIR}" )
+    else()
+      message( STATUS "Looking for Qt SDK....not found." )
+    endif()
+
+    set_package_properties( Qt PROPERTIES
+      URL "http://qt.io"
+      DESCRIPTION "Qt is a comprehensive cross-platform C++ application framework."
+      TYPE OPTIONAL
+      PURPOSE "Only needed to demo qt version of draco_diagnostics." )
+
+  endif()
 
 endmacro()
 
-- 
2.26.2