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创建.cpp文件 先宏定义STB_IMAGE_WRITE_IMPLEMENTATION， 再include头文件stb_image_write.h 这样做是因为stb_image_write将API和源码整合在了一个.h文件里，于是.h文件就同时包含了API声明和API定义。 这么做的原因可能是出于方便管理，一个.h文件总比一个.h文件加一个.cpp文件或.so文件更方便一些。 但是整合在一起后，我们又不希望每个include该头文件的其它文件每次都重新定义一遍API，所以就加了一个宏变量去限制它， 只有定义了该宏变量的文件，才会对API进行定义，其它文件只有API的声明部分。 通过此方法，最终实现了API声明和定义整合在一起，同时限制了重复定义的问题。
使用add_library是用来生成stbiw静态库的。 使用target_include_directories指定了stbiw库关联了当前目录（即/stbiw），且使用了public关键字，这将会传递给所有与stbiw库关联的文件，这些被关联的文件也会到/stbiw目录中去寻找可能需要的头文件。
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可以哦
无法顺畅的大口呼吸，是活着的最好证明
…---Original---
From: ***@***.***>
Date: Thu, Jul 14, 2022 22:59 PM
To: ***@***.***>;
Cc: ***@***.***>;
Subject: [parallel101/hw01] Hw01 frsama (PR #100)
不太会用git，不知道这样可以吗？
You can view, comment on, or merge this pull request online at:
#100
Commit Summary
b3d6555 Create stb_image_write.cpp
0dd5fc7 Update CMakeLists.txt
File Changes
(2 files)
M stbiw/CMakeLists.txt (2)
A stbiw/stb_image_write.cpp (2)
Patch Links:
https://github.com/parallel101/hw01/pull/100.patch
https://github.com/parallel101/hw01/pull/100.diff
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不太会用git，不知道这样可以吗？