vcpkg/ports/azure-iot-sdk-c/improve-external-deps-preview.patch

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 +1,11 @@
 #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(uhttp)
+find_dependency(umqtt)
+find_dependency(azure_c_shared_utility)
 
 include("${CMAKE_CURRENT_LIST_DIR}/azure_iot_sdksTargets.cmake")
 
diff --git a/iothub_client/tests/iothubclient_amqp_dt_e2e/CMakeLists.txt b/iothub_client/tests/iothubclient_amqp_dt_e2e/CMakeLists.txt
index 33b5b8709..45ef7b87a 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}_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/CMakeLists.txt b/CMakeLists.txt
index ba2f8e016..19885c8b8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -179,17 +179,6 @@ 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}")
@@ -407,7 +396,7 @@ endif()
 
 if (${use_installed_dependencies})
     # Install azure_iot_sdks
-    set(package_location "cmake")
+    set(package_location "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
 
     include(CMakePackageConfigHelpers)
 
@@ -422,14 +411,10 @@ if (${use_installed_dependencies})
         COPYONLY
     )
 
-    install(FILES ${parson_h_install_files}
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/azureiot
-    )
-    install(TARGETS ${parson_install_libs} EXPORT azure_iot_sdksTargets
-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/azureiot
-    )
+    find_package(unofficial-parson REQUIRED CONFIG)
+    if(NOT TARGET parson)
+        add_library(parson ALIAS unofficial::parson::parson)
+    endif()
 
     install(EXPORT azure_iot_sdksTargets
         FILE
@@ -446,11 +431,5 @@ if (${use_installed_dependencies})
         DESTINATION
             ${package_location}
     )
-else()
-    install(FILES ${parson_h_install_files}
-        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/azureiot)
-    install(TARGETS ${parson_install_libs}
-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
 endif()