节约时间，修改后的tree版本传送门，GitHub - feilongfl/tree-for-fuchsia: fork from http://mama.indstate.edu/users/ice/tree/
高高兴兴的把tree下载下来发现根本不能用:)
从 The Tree Command for Linux Homepage 下载最新（2019.3.4）版本1.8 放在//zircon/system/uapp/tree下，并在uapp下的BUILD.gn添加tree，在tree目录下建立编译文件，忽略各种warrning，然后改掉tree里面各种空括号函数()=>(void)
# Copyright 2019 The Fuchsia Authors. All rights reserved.# Use of this source code is governed by a BSD-style license that can be# found in the LICENSE file. config("tree_config") { cflags = [ "-Wno-discarded-qualifiers", "-Wno-implicit-fallthrough", "-Wno-sign-compare", "-Wno-unused-but-set-parameter", "-Wno-incompatible-pointer-types" ]} executable("tree") { configs += [ ":tree_config" ] sources = [ "color.c", "hash.c", "json.c", "tree.c", "unix.c", "file.c", "html.c", "strverscmp.c", "tree.h", "xml.c", ]}
开始编译…….顺利通过，高高兴兴在系统中打开tree命令，顺利的看到崩溃堆栈（手动滑稽），什么鬼…
今天（2019.3.4）太晚了，随手搞搞，先开个坑
开始查坑
首先早上(2019.3.5)起来先写了个helloworld试试水，毕竟这才是正路啊～～
# Copyright 2019 The Fuchsia Authors. All rights reserved.# Use of this source code is governed by a BSD-style license that can be# found in the LICENSE file. executable("i2c") { sources = [ "i2c.c", ] deps = [ "$zx/system/fidl/fuchsia-hardware-i2c:c", "$zx/system/ulib/fdio", "$zx/system/ulib/zircon", ]}
所以说c语言helloworld我还是能不调试一次写成功的（笑）
这样的话问题就比较清晰了，之前的tree命令没有依赖项。使用输入输出必须添加fdio依赖
google对fdio的说明
FDIO是一个客户端库，它通过紫红色系统接口中的底层fuchsia.io协议提供类似POSIX的抽象。FDIO is a client library that provides a POSIX-like abstraction over the underlying fuchsia.io protocol in the Fuchsia System Interface.
解决tree
添加fdio依赖即可运行（我已经修正github仓库）
# Copyright 2019 The Fuchsia Authors. All rights reserved.# Use of this source code is governed by a BSD-style license that can be# found in the LICENSE file. config("tree_config") { cflags = [ "-Wno-discarded-qualifiers", "-Wno-implicit-fallthrough", "-Wno-sign-compare", "-Wno-unused-but-set-parameter", "-Wno-incompatible-pointer-types" ]} executable("tree") { configs += [ ":tree_config" ] sources = [ "color.c", "hash.c", "json.c", "tree.c", "unix.c", "file.c", "html.c", "strverscmp.c", "tree.h", "xml.c", ] deps = [ "$zx/system/ulib/fdio", ]}
然后就可以查看fuchsia里面到底是什么目录结构了
想直接查看的朋友移步 fuchsia tree output · GitHub