GCC中的OpenSSL链接选项-lssl和-lcrypto

问题描述

添加链接选项后：-lssl和-lcrypto，我的程序被正确编译。
但是，我发现GCC不包括这两个选项，所以选项来自哪里？ 告诉我们 -l 是链接库的选项。

  -llibrary 
 -l library 
链接时搜索名为library的库。 （第二种替代方法是使用
库作为单独的参数，仅用于POSIX合规性，并且不建议使用
。）
  

所以你要告诉gcc链接库ssl和crypto。这些库通常安装在 / usr / lib 中。在Linux上，它们将被称为 libssl.so 和 libcrypto.so 。在OS X上，它们将被称为 libssl.dylib 和 libcrypto.dylib 。

After adding the link options: -lssl and -lcrypto, my program was correctly compiled.However, I found GCC doesn't include the two options, so where do the options come from?

解决方案

The GCC documentation tells us that -l is the option to link with a library.

-llibrary
-l library
Search the library named library when linking. (The second alternative with the
library as a separate argument is only for POSIX compliance and is not
recommended.)

So you're telling gcc to link with the libraries "ssl" and "crypto". These libraries are typically installed in /usr/lib. On Linux they'll be called libssl.so and libcrypto.so. On OS X they'll be called libssl.dylib and libcrypto.dylib.

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