Introduce a macro that adds all flags to all targets

cmake/modules/DuneMacros.cmake

@@ -1155,3 +1155,15 @@ macro(add_dune_all_flags targets)
     target_link_libraries(${target} ${DUNE_LIBS} ${libs})
   endforeach()
 endmacro(add_dune_all_flags targets)
+
+# set includes, libraries and compile definitions for the entire project recursively
+macro(dune_enable_all_packages)
+  get_property(all_incs GLOBAL PROPERTY ALL_PKG_INCS)
+  include_directories(${all_incs})
+  get_property(all_libs GLOBAL PROPERTY ALL_PKG_LIBS)
+  link_libraries(${DUNE_LIBS} ${all_libs})
+  get_property(all_defs GLOBAL PROPERTY ALL_PKG_DEFS)
+  foreach(def ${all_defs})
+    add_definitions("-D${def}")
+  endforeach(def in ${all_defs})
+endmacro(dune_enable_all_packages)