[SOLVED] libmicrohttpd 0.9.55 and kodi 17.3

Slackware 14.2: I just updated libmicrohttpd to 0.9.55 using the slackbuilds.org script. (Well, using sbopkg from the command line.)

Now kodi whines:

/usr/lib64/kodi/kodi.bin: error while loading shared libraries: libmicrohttpd.so.10: cannot open shared object file: No such file or directory

What gives? I tried rebooting, no luck.

Do I have to rebuild Kodi? That's a long one IIRC.

But I don't recall having to rebuild stuff usually, if I update a dependency... (though I've probably broken stuff this way before and not noticed.)

I got lucky because I still have libmicrohttpd-0.9.42-x86_64-1_SBo.tgz in /tmp, so I just switched to that and kodi is fine.

It looks like libmicrohttpd-0.9.55 is ABI level 12 and 0.9.42 was level 10 (see link below). So, when you installed the newer version, it removed libmicrohttpd.so.10 and installed libmicrohttpd.so.12. This means you'd need to rebuild kodi for it to pick up the newer version of libmicrohttpd.

But, according to this the newer version should be 100% backwards compatible with the old version, so you should be able to symlink the newer so.12 to so.10 and have everything work. But that's not a good practice to get in and it is better in the long run to just rebuild kodi.

Indeed, from time to time when libraries are updated, the packages that depend on them need to be rebuilt. Many times not, but it doesn't hurt to always rebuild them anyway just to avoid the headache when you need to use them and find they don't work.