update fltk

MoAlyousef · MoAlyousef · commit f2edbba3721c · 2025-05-08T21:59:53.000+03:00
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -40,6 +40,11 @@ endif()
 if(USE_SYSTEM_FLTK)
   find_package(FLTK REQUIRED NO_MODULE)
 else()
+  file(GLOB RESULT "fltk")
+  list(LENGTH RESULT RES_LEN)
+  if(RES_LEN EQUAL 0)
+    message(FATAL_ERROR "fltk submodule not initialized! Run: git submodule update --init --recursive")
+  endif()
   add_subdirectory(fltk)
 endif()
 
diff --git a/fltk b/fltk
@@ -1 +1 @@
-Subproject commit 709fdef10fa71264967f84158820c76f5992f04e
+Subproject commit b21b7feaaac1d4f44b6a1e69d4547cb77e2afc08
