openssl problem when compiling/linking

galapogos · 06-04-2008, 04:34 AM

Hi,

I'm trying to make a program that uses openssl. The Makefile uses the -static option and when I try to make it this way it gives the following error:

Code:

../lib/libopensc.a(card-gpk.o)(.text+0x1254): In function `gpk_compute_crycks':
: undefined reference to `DES_set_key_unchecked'

Along with several other undefined references.

When I remove the -static option, it gives the same error. However, when I remove the -static option and add -lcrypto, the program compiles and links properly.

With both -static and -lcrypto I get the following error:

Code:

/usr/bin/ld: cannot find -lcrypto

I have openssl and openssl-devel installed according to urpmi, but when I do a "rpm -q" it can only find openssl and not openssl-devel. Is there a static version of the library that I also need to install?

I'm using Mandrake 9.1 btw.

clvic · 06-05-2008, 03:36 AM

Look whether you've got libcrypto.a, that is the static version, installed.
I use a different distro and can find it in /usr/lib.
If you have "locate" installed, try with "locate libcrypto.a".
The -devel packages should contain only the header files, so if compilation is ok the problem is not with them, but with the package containing the libraries itself

galapogos · 06-10-2008, 02:49 AM

No I have libcrypt.a in /usr/lib but not libcrypto.a. I only have the shared libraries libcrypto.so.

The weird thing is I don't remember ever using libcrypto in my application, which is why -lcrypto wasn't even in the Makefile, and I was able to build the app in another system with Mandrake 9.1. I only added -lcrypto after googling for a solution to my rebuilding problems and came across it. It allows me to build it, but not with the -static option.

galapogos · 06-10-2008, 03:07 AM

Just some more information. I did a locate on libcrypto, libssl and openssl. For both libcrypto and libssl, I found 4 entries each in /usr/lib

Code:

/usr/lib/libssl.so.0.9.7
/usr/lib/libssl.so.0
/usr/lib/libssl.so.0.9.6
/usr/lib/libssl3.so
/usr/lib/libssl.so

and

Code:

/usr/lib/libcrypto.so.0.9.7
/usr/lib/libcrypto.so.0
/usr/lib/libcrypto.so.0.9.6
/usr/lib/libcrypto.so

For openssl there was a whole bunch of stuff located.

This leads me to believe that I don't have the static versions of any of these installed, and that I should?

Should I download the src of openssl-static from rpmfind.net and install it? Are they distribution specific?

clvic · 06-10-2008, 11:29 AM

I think that trying with the openssl-static src rpm is a good idea. Although rpms are distribution specific, as long as they are well done and the two distros are based on the same set of basic libraries, it's highly probable that you can compile it on other distros.
Try as you said, or grab the right .a from another installed system, or compile openssl from the tarball.

galapogos · 06-10-2008, 11:54 AM

Thanks. I ended up installing the RPM off my Mandrake CD3. Doh, forgot that it was in there all this while.

Built like a dream after it was installed