Build external library in subdirectory

Usage
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5

Thanks Alain, I got it working with the following.

cmake_minimum_required(VERSION 3.10.2)

project(reactnativezstd)

set (CMAKE_VERBOSE_MAKEFILE ON)
set (CMAKE_CXX_STANDARD 11)
#
set(ZSTD_BUILD_PROGRAMS OFF) # Avoid  Target "zstd" of type EXECUTABLE may not be linked into another target error
set(ZSTD_LEGACY_SUPPORT OFF)
set(ZSTD_BUILD_TESTS OFF)

add_subdirectory(../zstd/build/cmake _zstd)
#

add_library(reactnativezstd
            SHARED
            ../cpp/react-native-testlib.cpp
            cpp-adapter.cpp
)

target_include_directories(
    reactnativezstd
    PUBLIC
       ../zstd/lib
        ../cpp
)
#
add_library(libzstd STATIC IMPORTED)
set_property(TARGET libzstd PROPERTY IMPORTED_LOCATION _zstd/lib/libzstd.a)

target_link_libraries(
        reactnativezstd
        PRIVATE
        libzstd
)

Are there some improvements to this file or is it fine as it is?