Build ADIOS2 using ExternalProject_Add

[abkein]

Like an any project I'm using from GutHub I link it to my program via ExternalProject_Add in cmake, so it can be easily installed via git submodules.
But when I'm trying to do it with ADIOS2 I get an error that adios2.h cannot be found:

smth.cpp:2:10: fatal error: adios2.h: No such file or directory
    2 | #include "adios2.h"
      |          ^~~~~~~~~~
compilation terminated.

MWE:
CMakeLists.txt:

cmake_minimum_required(VERSION 3.0.0)
project(smth VERSION 0.1.0 LANGUAGES C CXX)

include(ExternalProject)

set(CMAKE_STAGING_PREFIX ${PROJECT_SOURCE_DIR}/build/stage)
set(STAGING_DIR ${PROJECT_SOURCE_DIR}/build/stage)

find_package(MPI REQUIRED)

if(NOT TARGET MPI::MPI_CXX)
    add_library(MPI::MPI_CXX IMPORTED INTERFACE)

    set_property(TARGET MPI::MPI_CXX
                 PROPERTY INTERFACE_COMPILE_OPTIONS ${MPI_CXX_COMPILE_FLAGS})
    set_property(TARGET MPI::MPI_CXX
                 PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${MPI_CXX_INCLUDE_PATH}")
    set_property(TARGET MPI::MPI_CXX
                 PROPERTY INTERFACE_LINK_LIBRARIES ${MPI_CXX_LINK_FLAGS} ${MPI_CXX_LIBRARIES})
endif()

ExternalProject_Add(adios2
    PREFIX adios2
    SOURCE_DIR ${PROJECT_SOURCE_DIR}/lib/adios2
    CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
    -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
    -DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
    -DCMAKE_INSTALL_PREFIX=${STAGING_DIR}
    -DBUILD_SHARED_LIBS=OFF
    -DADIOS2_BUILD_EXAMPLES=OFF
    -DBUILD_TESTING=OFF
    -DADIOS2_USE_MPI=ON
)

include_directories(${PROJECT_SOURCE_DIR}/lib/adios2/bindings)

add_executable(smth ${PROJECT_SOURCE_DIR}/src/smth.cpp)

target_link_libraries(smth PUBLIC MPI::MPI_CXX)

add_dependencies(${PROJECT_NAME} adios2)

smth.cpp:

#include "adios2.h"

int main(int argc, char const *argv[])
{
    return 0;
}

Folders structure:

smth/
├─ lib/
│  ├─ adios2/             # folder added via `git submodule add https://github.com/ornladios/ADIOS2 lib/adios2`
├─ src/
│  ├─ smth.cpp
├─ CMakeLists.txt
├─ build/                 # `cd build && cmake ../ && cmake --build .`

[abkein]

So far I found a workaround: adding include_directories(${STAGING_DIR}/include). But I don't think it's right solution.

UPD: Also I found option -DADIOS2_USE_MPI=ON not working and in the build ADIOS2_USE_MPI=0