windows下 编译报错

error: failed to run custom build command for openssl-sys v0.9.63
解决办法：

1.安装openssl
Windows下：
https://slproweb.com/products/Win32OpenSSL.html网站下载
https://slproweb.com/download/Win64OpenSSL-1_0_2u.exe

或
https://slproweb.com/download/Win32OpenSSL-1_0_2u.exe

Linux下：
centos: yum install -y openssl-dev openssl
debian/ubuntu：apt-get install -y openssl

2.rust编译
cargo build
错误信息：
error: failed to run custom build command for openssl-sys v0.9.63

解决方案：
安装Win32/64OpenSSL-1_0_2s.exe，然后配置环境变量
OPENSSL_DIR=C:\OpenSSL-Win64，
powershell: $env:OPENSSL_DIR="C:\OpenSSL-Win64"
cmd: set OPENSSL_DIR="C:\OpenSSL-Win64"

$env:OPENSSL_LIB_DIR="C:\OpenSSL-Win64\lib"
$env:OPENSSL_INCLUDE_DIR="C:\OpenSSL-Win64\include"
$env:OPENSSL_DIR="C:\OpenSSL-Win64"

git clone https://github.com/Microsoft/vcpkg.git
cd vcpkg
./bootstrap-vcpkg.bat

Add the current folder into PATH environment variable

vcpkg install openssl-windows:x64-windows

Switch to the rust project

cargo build

再次运行，OK。

3.rust运行
cargo run:

错误信息：
error: process didn't exit successfully: target\debug\async_ex1.exe (exit code: 0xc0000135, STATUS_DLL_NOT_FOUND)

解决方案：
拷贝libeay.dll、ssleay.dll、libssl.dll到target\debug目录下，

再次运行，OK。
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原文链接：https://blog.csdn.net/shangsongwww/article/details/117299182

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