--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -170,43 +170,43 @@ endif()
 # libicu is highly recommended for RSCALE support
 #  libicu can be found at http://www.icu-project.org
 #  RSCALE info at http://tools.ietf.org/html/rfc7529
-find_package(ICU)
-set_package_properties(ICU PROPERTIES
-  TYPE RECOMMENDED
-  PURPOSE "For RSCALE (RFC7529) support"
-)
-add_feature_info(
-  "RSCALE support (RFC7529)"
-  ICU_FOUND
-  "build in RSCALE support"
-)
-if(ICU_FOUND)
-  set(REQUIRES_PRIVATE_ICU "Requires.private: icu-i18n") #for libical.pc
-  set(HAVE_LIBICU 1)
-  if(ICU_MAJOR_VERSION VERSION_GREATER 50)
-    set(HAVE_ICU_DANGI TRUE)
-  else()
-    set(HAVE_ICU_DANGI FALSE)
-  endif()
-endif()
-if(ICU_I18N_FOUND)
-  set(HAVE_LIBICU_I18N 1)
-endif()
+# find_package(ICU)
+# set_package_properties(ICU PROPERTIES
+#   TYPE RECOMMENDED
+#   PURPOSE "For RSCALE (RFC7529) support"
+# )
+# add_feature_info(
+#   "RSCALE support (RFC7529)"
+#   ICU_FOUND
+#   "build in RSCALE support"
+# )
+# if(ICU_FOUND)
+#   set(REQUIRES_PRIVATE_ICU "Requires.private: icu-i18n") #for libical.pc
+#   set(HAVE_LIBICU 1)
+#   if(ICU_MAJOR_VERSION VERSION_GREATER 50)
+#     set(HAVE_ICU_DANGI TRUE)
+#   else()
+#     set(HAVE_ICU_DANGI FALSE)
+#   endif()
+# endif()
+# if(ICU_I18N_FOUND)
+#   set(HAVE_LIBICU_I18N 1)
+# endif()
 
 # compile in Berkeley DB support
-find_package(BDB)
-set_package_properties(BDB PROPERTIES
-  TYPE OPTIONAL
-  PURPOSE "For Berkeley DB storage support"
-)
-add_feature_info(
-  "Berkeley DB storage support"
-  BDB_FOUND
-  "build in support for Berkeley DB storage"
-)
-if(BDB_FOUND)
-  set(HAVE_BDB True)
-endif()
+# find_package(BDB)
+# set_package_properties(BDB PROPERTIES
+#   TYPE OPTIONAL
+#   PURPOSE "For Berkeley DB storage support"
+# )
+# add_feature_info(
+#   "Berkeley DB storage support"
+#   BDB_FOUND
+#   "build in support for Berkeley DB storage"
+# )
+# if(BDB_FOUND)
+#   set(HAVE_BDB True)
+# endif()
 
 # MSVC specific definitions
 if(WIN32)