Programming

I have a C++ program which includes lots of libraries, including openssl libcrypto. In fact, the g++ switches are:

-lxml2 -lcrypto -lcurl etc.

The problem is that when I try to run it on a different flavor of Linux, it complains that it cannot load libcrypto.so.8. I did some research and learned about the difference between static and shared libraries, but can't quite figure out what steps to take to compile the libcrypto library in such a way that everything goes into the executable so that my program can be portable. Thanks in advance for any help you can give me.

Brandon

You need to compile/link with -lcrypto -L dir of libcrypto.a to get a static link. If only .so is available, it will go dynamic.

It is portable in two pieces or if the far end has a compatible .so, hopefully one that is not hacked! It saves space, disk and RAM, increases cache hits as all on one host use same lib at once, and takes little time to dynamically link.

Thanks. Can you give me an example of what the command would look like?

Depends on the compiler, usually in a make file.

Code:

gcc -o yourname -Bstatic -L<dir-of-libcrypto.a> -lcrypto . . . yourfile.c

Thanks, but I have one point of confusion. How can I make this apply only to the one library libcrypto and not to any of the others in the list?

Just put -Bdynamic before mentioning them, order is important left to right.

Ah, lcrypto is it? Thanks! I always wondered why I couldn't compile ssl-using things statically when giving -static -lssl...