vcpkg/ports/fltk/include.patch

diff --git a/CMake/fl_add_library.cmake b/CMake/fl_add_library.cmake
index 29baa95..7e3490b 100644
--- a/CMake/fl_add_library.cmake
+++ b/CMake/fl_add_library.cmake
@@ -37,6 +37,8 @@ macro (FL_ADD_LIBRARY LIBNAME LIBTYPE LIBFILES)
 
   add_library(${TARGET_NAME} ${LIBTYPE} ${LIBFILES})
 
+  target_include_directories(${TARGET_NAME} PUBLIC $<INSTALL_INTERFACE:include>)
+
   # target properties for all libraries
 
   set_target_properties(${TARGET_NAME}