How to import proto files between different files using cmake

What language does this apply to?
If it's a proto syntax change, is it for proto2 or proto3?
If it's about generated code change, what programming language?

Describe the problem you are trying to solve.
import proto files from different files
Describe the solution you'd like

Describe alternatives you've considered

Additional context
Add any other context or screenshots about the feature request here.
My project file structure and CMakeLists.txt in file msg_b shown below,：
.
├── Protocol-Buffer-Examples
│   ├── build
│   ├── CMakeLists.txt
│   ├── docker
│   │   └── protobuf.Dockerfile
│   ├── examples
│   │   ├── add_people
│   │   │   ├── add_people.cc
│   │   │   └── CMakeLists.txt
│   │   ├── CMakeLists.txt
│   │   └── list_people
│   │   ├── CMakeLists.txt
│   │   └── list_people.cc
│   ├── LICENSE.md
│   ├── msg_a
│   │   ├── a.proto
│   │   └── CMakeLists.txt
│   ├── msg_b
│   │   ├── addressbook.proto
│   │   ├── CMakeLists.txt
│   │   └── CMakeLists.txt.bak
│   ├── README.md

And the CMakeLists.txt in file msg_b is :
cmake_minimum_required(VERSION 3.14.7)

project(addressbook)
message("---------------in msg_b----------------------------:")
set(CMAKE_BUILD_TYPE RelWithDebInfo)

Find required protobuf package

find_package(Protobuf REQUIRED)
set(PROTOBUF_IMPORT_DIRS)

set(PROTOBUF_IMPORT_DIRS ${CMAKE_SOURCE_DIR}/msg_a)

set(PROTOBUF_IMPORT_DIRS ${project_top_dir})
message("PROTOBUF_IMPORT_DIRS:" ${PROTOBUF_IMPORT_DIRS})
include_directories(${CMAKE_BINARY_DIR})
link_libraries(${CMAKE_BINARY_DIR}/msg_a/liba.so)
include_directories(${CMAKE_BINARY_DIR}/msg_a)
include_directories(${CMAKE_BINARY_DIR}/msg_b)

file(GLOB PROTO_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.proto)
foreach(proto ${PROTO_FILES})
# Get filename without extension
get_filename_component(PROTO_NAME_WE ${proto} NAME_WE)
message("PROTO_NAME_WE:" ${PROTO_NAME_WE})
get_filename_component(PROTO_NAME ${proto} NAME)
message("PROTO_NAME:" ${PROTO_NAME})
add_library(${PROTO_NAME_WE} SHARED ${proto})
protobuf_generate(TARGET ${PROTO_NAME_WE} IMPORT_DIRS ${PROTOBUF_IMPORT_DIRS})
target_link_libraries(${PROTO_NAME_WE} PUBLIC ${Protobuf_LIBRARIES} a pthread)
target_include_directories(${PROTO_NAME_WE} PUBLIC ${Protobuf_INCLUDE_DIRS} ${CMAKE_BINARY_DIR}/msg_a)
endforeach()

In the addressbook.proto I use the import "msg_a/a.proto" to import the a.proto,
But when i make ,there was an error:

XXXXX/build/msg_b/addressbook.pb.cc:136:6: error: ‘::descriptor_table_msg_5fa_2fa_2eproto’ has not been declared
&::descriptor_table_msg_5fa_2fa_2eproto,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
XXXXX/build/msg_b/addressbook.pb.cc:136:6: note: suggested alternative: ‘descriptor_table_a_2eproto’
&::descriptor_table_msg_5fa_2fa_2eproto,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
descriptor_table_a_2eproto

Start with msg_b/CMakeLists.txt and msg_b/addressbook.proto, then compare the import path and generated-file setup with msg_a/CMakeLists.txt. Reproduce the reported build and determine what configuration is needed for the cross-directory proto import to compile without the descriptor-table error; no specific test is mentioned.