Compiling Libtorrent under Slackware 13

Not a huge problem, but I bumped into it trying to compile libtorrent 0.12.6 under Slackware 13.

The configure command stopped with the following message:

[... Lots of lines ommitted here ...]
checking for OPENSSL... yes
checking for STUFF... configure: error: Package requirements (sigc++-2.0) were not met:

No package 'sigc++-2.0' found

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

So, libtorrent needs libsigc++ to be installed. No big deal, except that libsigc++ is already installed in /usr/local/lib/... What gives?

Well, the configure script helpfully gives you the answer: the PKG_CONFIG_PATH variable needs to be adjusted.

In order to that, we first have to check its actual value:

$ env | grep -i PKG_CONFIG_PATH

Aha! There is the problem. Solving it is as simple as doing this:

$ export PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig:/usr/lib64/pkgconfig:/usr/local/lib/pkgconfig/

Then double-check with the following command:

$ env | grep -i PKG_CONFIG_PATH

That's it! From now on, compiling libtorrent is as simple as:

$./configure && make && sudo make install

It is now possible to proceed with the compilation of rtorrent, a very nice console-mode torrent client for the distinguished and discerning gentleman. :-)

The question I am asking myself is: how come libsigc++ is not integrated by default in Slackware 13? Inquiring minds want to know!!

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