build: 新增安卓可执行文件编译方法 (#77)

Android/CMakeLists.txt

@@ -0,0 +1,32 @@
+if(CMAKE_TOOLCHAIN_FILE)
+    set(LIBRARY_OUTPUT_PATH_ROOT ${CMAKE_BINARY_DIR} CACHE PATH "root for library output, set this to change where android libs are compiled to")
+    # get absolute path, but get_filename_component ABSOLUTE only refer with source dir, so find_file here :(
+    get_filename_component(CMAKE_TOOLCHAIN_FILE_NAME ${CMAKE_TOOLCHAIN_FILE} NAME)
+    find_file(CMAKE_TOOLCHAIN_FILE ${CMAKE_TOOLCHAIN_FILE_NAME} PATHS ${CMAKE_SOURCE_DIR} NO_DEFAULT_PATH)
+    message(STATUS "CMAKE_TOOLCHAIN_FILE = ${CMAKE_TOOLCHAIN_FILE}")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_PREFIX)
+    set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory")
+endif()
+message(STATUS "CMAKE_INSTALL_PREFIX = ${CMAKE_INSTALL_PREFIX}")
+
+cmake_minimum_required(VERSION 2.8.12)
+
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE release CACHE STRING "Choose the type of build" FORCE)
+endif()
+
+if(NOT CMAKE_VERSION VERSION_LESS "3.15")
+    # enable CMAKE_MSVC_RUNTIME_LIBRARY
+    cmake_policy(SET CMP0091 NEW)
+endif()
+
+if(POLICY CMP0025)
+    # reference from https://cmake.org/cmake/help/latest/policy/CMP0025.html
+    cmake_policy(SET CMP0025 NEW)
+endif()
+
+project(ruapu)
+
+add_executable(ruapu ../main.c)

Android/build.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+BUILD_DIR=build
+
+mkdir -p $BUILD_DIR
+pushd $BUILD_DIR
+
+cmake -DCMAKE_TOOLCHAIN_FILE="$ANDROID_NDK/build/cmake/android.toolchain.cmake"\
+    -DANDROID_ABI="arm64-v8a" \
+    -DANDROID_PLATFORM=android-21 ..
+
+make