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path: root/app/CMakeLists.txt
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# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.
cmake_minimum_required(VERSION 3.4.1)
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/libs/cmake)

# I have no idea why this is required...
if(NOT DEFINED CMAKE_SYSROOT AND DEFINED ANDROID_SYSROOT)
    set(CMAKE_SYSROOT ${ANDROID_SYSROOT})
endif(NOT DEFINED CMAKE_SYSROOT AND DEFINED ANDROID_SYSROOT)

# OpenSSL stuff
file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/openssl/include)
add_custom_command(OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libssl.so ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libcrypto.so
        COMMAND ${CMAKE_COMMAND} -E env
            SOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}/libs/openssl
            OUTPUT_DIR=${CMAKE_LIBRARY_OUTPUT_DIRECTORY}
            ANDROID_NDK=${ANDROID_NDK}
            ANDROID_ABI=${ANDROID_ABI}
            ANDROID_CXX_COMPILER=${CMAKE_CXX_COMPILER}
            ${CMAKE_CURRENT_SOURCE_DIR}/libs/build-openssl.sh
        COMMENT "Building OpenSSL"
        WORKING_DIRECTORY openssl)
add_custom_target(openssl DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libssl.so ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libcrypto.so)

add_library(libssl SHARED IMPORTED)
add_dependencies(libssl openssl)
set_property(TARGET libssl PROPERTY IMPORTED_LOCATION ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libssl.so)
set_property(TARGET libssl PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_BINARY_DIR}/openssl/include ${CMAKE_CURRENT_SOURCE_DIR}/libs/openssl/include)

add_library(libcrypto SHARED IMPORTED)
add_dependencies(libcrypto openssl)
set_property(TARGET libcrypto PROPERTY IMPORTED_LOCATION ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/libcrypto.so)
set_property(TARGET libssl PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${CMAKE_CURRENT_BINARY_DIR}/openssl/include ${CMAKE_CURRENT_SOURCE_DIR}/libs/openssl/include)

# libjpeg-turbo
set(ENABLE_STATIC OFF CACHE BOOL "Disable turbojpeg static libs")
set(WITH_TURBOJPEG OFF CACHE BOOL "Disable turbojpeg libturbojpeg")
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/libs/libjpeg-turbo libjpeg-turbo EXCLUDE_FROM_ALL)
target_include_directories(jpeg
        INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/libs/libjpeg-turbo
        INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/libjpeg-turbo
        )

# libvncserver
add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/libs/libvncserver libvncserver EXCLUDE_FROM_ALL)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp )

# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       native-lib

                       libssl
                       libcrypto
                       jpeg
                       vncserver

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )