In Adobe’s Penguin.SWF blog, we can learn some details about the upcoming version 10 of the Adobe flash player for Linux:
They’ll rely on more libraries to be present in the system rather than provide them all by themselves in their own install. This apparently includes libcurl.
So if you get the RPM of the pre-release player, you’ll notice that it requires “libcurl.so.3” which is the old SONAME for libcurl (libcurl 7.15.5 was the last release which used the number 3) which no up-to-date distribution should provide anymore. Since october 2006 we’ve shipped libcurl.so.4.
Apparently, this made the Fedora people first implement a work-around for this that re-introduces the SONAME 3 from the same source the SONAME 4 is made from, only to a short while afterwards revert that decision…
An interesting side-note is how the Fedora people repeat over and over in those threads that libcurl with SONAME 3 and SONAME 4 use the same ABI, although that is not true (at least not by my definition of what an ABI is). The bump was not accidentally made.
Update: it seems some blame this 3 == 4 thing on Debian…
I’m involved in numerous projects, and a subset of them take a lot of my “copious” spare time. This has the unfortunate downside that a few other projects get left behind a bit. Projects that also really could use with some more attention and improvements. Two of the most obvious examples of this are c-ares and libssh2. Coincidentally, both of these projects are also used by libcurl (although of course also by others).
c-ares is a library that performs asynchronous DNS lookups. It is quite mature and functional already, as it is based on the ares project and has been proved in use for quite some time. There are currently one or two issues that have appeared recently when the Debian project tried to provide the curl package built with c-ares…
libssh2 is a client library for talking SSH2 with servers. There are actually not very many SSH libraries “out there”, and in an evaluation I did a few years ago libssh2 was the best one around. libcurl uses libssh2 for SCP and SFTP transfers, and it (libssh2) does suffer from a few API flaws, a few bugs and perhaps most noticably it is significantly slower than the openssh tools in just about all transfer tests.
I’m still highly involved in both of these projects, but lack of time prevents me from participating as much as I’d like to.