improve-external-deps.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a8011fb..9fc05c7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -155,17 +155,6 @@ endif()
 # Use solution folders.
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
-# build the parson library for json parsing
-add_library(parson
-    ./deps/parson/parson.c
-    ./deps/parson/parson.h
-)
-if (MSVC)
-    set_source_files_properties(../deps/parson/parson.c PROPERTIES COMPILE_FLAGS "/wd4244 /wd4232")
-endif()
-set(parson_h_install_files ./deps/parson/parson.h)
-set(parson_install_libs parson)
-
 if (IN_OPENWRT)
     ADD_DEFINITIONS("$ENV{TARGET_LDFLAGS}" "$ENV{TARGET_CPPFLAGS}" "$ENV{TARGET_CFLAGS}")
     INCLUDE_DIRECTORIES("$ENV{TOOLCHAIN_DIR}/usr/include" "$ENV{TARGET_LDFLAGS}" "$ENV{TARGET_CPPFLAGS}" "$ENV{TARGET_CFLAGS}")
diff --git a/configs/azure_iot_sdksConfig.cmake b/configs/azure_iot_sdksConfig.cmake
index b9c62e8..edf5847 100644
--- a/configs/azure_iot_sdksConfig.cmake
+++ b/configs/azure_iot_sdksConfig.cmake
@@ -1,5 +1,10 @@
 #Copyright (c) Microsoft. All rights reserved.
 #Licensed under the MIT license. See LICENSE file in the project root for full license information.
+include(CMakeFindDependencyMacro)
+find_dependency(unofficial-parson)
+find_dependency(uamqp)
+find_dependency(umqtt)
+find_dependency(azure_c_shared_utility)
 
 include("${CMAKE_CURRENT_LIST_DIR}/azure_iot_sdksTargets.cmake")
 
diff --git a/dependencies.cmake b/dependencies.cmake
index fd06df6..c0e06fa 100644
--- a/dependencies.cmake
+++ b/dependencies.cmake
@@ -18,6 +18,9 @@ if(${use_installed_dependencies})
         endif ()
     endif ()
 
+    find_package(unofficial-parson REQUIRED)
+    link_libraries(unofficial::parson::parson)
+
 else ()
     add_subdirectory(c-utility)
 
diff --git a/iothub_client/tests/iothubclient_amqp_dt_e2e/CMakeLists.txt b/iothub_client/tests/iothubclient_amqp_dt_e2e/CMakeLists.txt
index 161872a..d53e111 100644
--- a/iothub_client/tests/iothubclient_amqp_dt_e2e/CMakeLists.txt
+++ b/iothub_client/tests/iothubclient_amqp_dt_e2e/CMakeLists.txt
@@ -31,12 +31,10 @@ set(${theseTestsName}_nuget_c_files
 
 set(${theseTestsName}_c_files
     ../../../certs/certs.c
-    ../../../deps/parson/parson.c
 )
 
 set(${theseTestsName}_h_files
     ../../../certs/certs.h
-    ../../../deps/parson/parson.h
     ../common_dt_e2e/iothubclient_common_dt_e2e.h
 )
 
diff --git a/iothub_client/tests/iothubclient_mqtt_dt_e2e/CMakeLists.txt b/iothub_client/tests/iothubclient_mqtt_dt_e2e/CMakeLists.txt
index d472161..b0291e8 100644
--- a/iothub_client/tests/iothubclient_mqtt_dt_e2e/CMakeLists.txt
+++ b/iothub_client/tests/iothubclient_mqtt_dt_e2e/CMakeLists.txt
@@ -31,12 +31,10 @@ set(${theseTestsName}_nuget_c_files
 
 set(${theseTestsName}_c_files
     ../../../certs/certs.c
-    ../../../deps/parson/parson.c
 )
 
 set(${theseTestsName}_h_files
     ../../../certs/certs.h
-    ../../../deps/parson/parson.h
     ../common_dt_e2e/iothubclient_common_dt_e2e.h
 )
 
diff --git a/iothub_client/tests/iothubclient_mqtt_dt_e2e_sfc/CMakeLists.txt b/iothub_client/tests/iothubclient_mqtt_dt_e2e_sfc/CMakeLists.txt
index d05d654..5872c8d 100644
--- a/iothub_client/tests/iothubclient_mqtt_dt_e2e_sfc/CMakeLists.txt
+++ b/iothub_client/tests/iothubclient_mqtt_dt_e2e_sfc/CMakeLists.txt
@@ -31,12 +31,10 @@ set(${theseTestsName}_nuget_c_files
 
 set(${theseTestsName}_c_files
     ../../../certs/certs.c
-    ../../../deps/parson/parson.c
 )
 
 set(${theseTestsName}_h_files
     ../../../certs/certs.h
-    ../../../deps/parson/parson.h
     ../common_dt_e2e/iothubclient_common_dt_e2e.h
 )
 
diff --git a/iothub_service_client/CMakeLists.txt b/iothub_service_client/CMakeLists.txt
index e47473e..b073513 100644
--- a/iothub_service_client/CMakeLists.txt
+++ b/iothub_service_client/CMakeLists.txt
@@ -81,9 +81,7 @@ endif()
 setSdkTargetBuildProperties(iothub_service_client)
 
 if(NOT ${nuget_e2e_tests})
-    target_link_libraries(iothub_service_client uamqp parson)
-else()
-    target_link_libraries(iothub_service_client parson)
+    target_link_libraries(iothub_service_client uamqp)
 endif()
 
 if (NOT ${ARCHITECTURE} STREQUAL "ARM")