c++ - How do I install the OpenSSL libraries on Ubuntu?

I'm trying to build some code on Ubuntu 10.04 LTS that uses OpenSSL 1.0.0. When I run make, it invokes g++ with the "-lssl" option. The source includes:

#include 

#include 
#include 
#include 
#include 
#include 

I ran:

$ sudo apt-get install openssl

Reading package lists... Done
Building dependency tree       
Reading state information... Done
openssl is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.

But I guess the openssl package doesn't include the library. I get these errors on make:

foo.cpp:21:25: error: openssl/bio.h: No such file or directory

foo.cpp:22:28: error: openssl/buffer.h: No such file or directory
foo.cpp:23:25: error: openssl/des.h: No such file or directory
foo.cpp:24:25: error: openssl/evp.h: No such file or directory
foo.cpp:25:25: error: openssl/pem.h: No such file or directory
foo.cpp:26:25: error: openssl/rsa.h: No such file or directory

How do I install the OpenSSL C++ library on Ubuntu 10.04 LTS?

I did a man g++ and (under "Options for Linking") for the -l option it states: " The linker searches a standard list of directories for the library..." and "The directories searched include several standard system directories..." What are those standard system directories?

Answer

You want to install the development package, which is libssl-dev:

sudo apt-get install libssl-dev