Qt-find_package call moved to root CMakeLists.txt

The framework is a required dependency for the project

CMakeLists.txt

@@ -14,6 +14,13 @@ if (NOT Protobuf_FOUND OR Protobuf_VERSION VERSION_LESS "3.0.0")
     add_subdirectory("${Protobuf_SOURCE_DIR}/cmake" ${Protobuf_BINARY_DIR})
 endif()
 
+# grpc target requires QT version not less than 5.11
+# earlier versions do not provide required Http2DirectAttribute: https://doc.qt.io/qt-5/whatsnew511.html
+find_package(Qt5 COMPONENTS Core Network REQUIRED)
+if (Qt5Core_VERSION VERSION_LESS "5.11.0")
+    message(FATAL_ERROR "Required Qt version is 5.11+")
+endif()
+
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 

src/grpc/CMakeLists.txt

@@ -1,8 +1,3 @@
-find_package(Qt5 COMPONENTS Core Network REQUIRED)
-if (Qt5Core_VERSION VERSION_LESS "5.8.0")
-    message(FATAL_ERROR "Required Qt version is 5.8+")
-endif()
-
 set(GRPC_SUPPORT_LIBRARY_TARGET qtgrpc)
 
 include_directories(${Qt5Core_INCLUDE_DIRS} ${Qt5Network_INCLUDE_DIRS} ${CMAKE_SOURCE_DIR}/src/protobuf)

src/protobuf/CMakeLists.txt

@@ -1,8 +1,3 @@
-find_package(Qt5 COMPONENTS Core REQUIRED)
-if (Qt5Core_VERSION VERSION_LESS "5.11.0")
-    message(FATAL_ERROR "Required Qt version is 5.11+")
-endif()
-
 set(SUPPORT_LIBRARY_TARGET qtprotobufsupport)
 
 include_directories(${Qt5Core_INCLUDE_DIRS} ${Qt5Network_INCLUDE_DIRS})

tests/CMakeLists.txt

@@ -11,8 +11,6 @@ if (UNIX AND NOT GTest_FOUND)
     add_subdirectory(${GTest_SOURCE_DIR} ${GTest_BINARY_DIR})
 endif()
 
-find_package(Qt5 COMPONENTS Core REQUIRED)
-
 include_directories(${Qt5Core_INCLUDE_DIRS})
 set(CMAKE_INCLUDE_CURRENT_DIR OFF)
 set(CMAKE_AUTOMOC OFF)