About three days ago, I finally bit the bullet and decided to give Kubuntu a try. While I have been using Debian happily for the past few years, I am discovering an increasing desire for simplicity and to have things work out of the box, rather than spend large amounts of time configuring everything from scratch. One of my side-goals was to try out the Pulse audio system to see if I could successfully integrate my Linux sound with my Airport Express. As it turns out, this does not work as smoothly as I'd anticipated. While getting it up and running was mostly straightforward, there are some playback issues that appear to be unresolved within the community. Perhaps a project for another day, but with a freshly-installed OS I wanted to play some tunes NOW!
So instead I go back to my previous work on raop_play and simply recompile with the new libraries on this installation... but I run into a problem. For some reason, the OpenSSL library wasn't being found by the linker, giving me the following error:
...
gcc -o raop_play raop_play.o raop_client.o rtsp_client.o aexcl_lib.o base64.o aes.o m4a_stream.o audio_stream.o wav_stream.o mp3_stream.o flac_stream.o ogg_stream.o aac_stream.o pls_stream.o pcm_stream.o -lssl -lsamplerate -lid3tag
raop_client.o: In function `rsa_encrypt':
raop_client.c:(.text+0x131): undefined reference to `RSA_new'
raop_client.c:(.text+0x175): undefined reference to `BN_bin2bn'
raop_client.c:(.text+0x1b3): undefined reference to `BN_bin2bn'
...
raop_client.o: In function `rsa_encrypt':
raop_client.c:(.text+0x131): undefined reference to `RSA_new'
raop_client.c:(.text+0x175): undefined reference to `BN_bin2bn'
raop_client.c:(.text+0x1b3): undefined reference to `BN_bin2bn'
...
... and so on for another dozen lines. Actually, it was an even-worse problem at first, until I discovered that gcc is sensitive to the ordering of files and library references, and fixed the Makefile to move all "-l" options to the end of the command, as shown above.
I racked my brain, wondering if I had an incompatible version of the OpenSSL library, or if the system's library path was broken, but every workaround I tried yielded the same result.