问如何在树上建立AOSP拉丁文IME？

EN

Soong is the replacement for the old Android make-based build system.
It replaces Android.mk files with Android.bp files,
which are JSON-like simple declarative descriptions of modules to build.



This Makefile-based system is in the process of being replaced with Soong, 
a new build system written in Go. 

During the transition, all of these makefiles are read by Kati, and generate a ninja file instead of being executed directly. 
That's combined with a ninja file read by Soong so that the build graph of the two systems can be combined and run as one.

Main segement that you want to build is : libjni_latinime
cc_library
{
name: "libjni_latinime",
host_supported: true,
product_specific: true,

sdk_version: "14",
cflags: [
    "-Werror",
    "-Wall",
    "-Wextra",
    "-Weffc++",
    "-Wformat=2",
    "-Wcast-qual",
    "-Wcast-align",
    "-Wwrite-strings",
    "-Wfloat-equal",
    "-Wpointer-arith",
    "-Winit-self",
    "-Wredundant-decls",
    "-Woverloaded-virtual",
    "-Wsign-promo",
    "-Wno-system-headers",

    // To suppress compiler warnings for unused variables/functions used for debug features etc.
    "-Wno-unused-parameter",
    "-Wno-unused-function",
],
local_include_dirs: ["src"],

srcs: [
    "com_android_inputmethod_keyboard_ProximityInfo.cpp",
    "com_android_inputmethod_latin_BinaryDictionary.cpp",
    "com_android_inputmethod_latin_BinaryDictionaryUtils.cpp",
    "com_android_inputmethod_latin_DicTraverseSession.cpp",
    "jni_common.cpp",

    ":LATIN_IME_CORE_SRC_FILES",
],

target: {
android_x86: {
        // HACK: -mstackrealign is required for x86 builds running on pre-KitKat devices to avoid crashes
        // with SSE instructions.
        cflags: ["-mstackrealign"],
    },
    android: {
        stl: "libc++_static",
    },
    host: {
        cflags: ["-DHOST_TOOL"],
    },
}