From Sy

[edit] 0.70.1

wget http://downloads.sourceforge.net/blackboxwm/blackbox-0.70.1.tar.bz2?modtime=1131011865&big_mirror=0
wget http://downloads.sourceforge.net/bbkeys/bbkeys-0.9.0.tar.gz?modtime=1110025235&big_mirror=0

props to [1]

su

tar -xvvjf blackbox-0.70.1.tar.bz2
cd blackbox-0.70.1
./configure --prefix=/usr/local/blackbox && make && make install 

export PKG_CONFIG_PATH=/usr/local/blackbox 
PKG_CONFIG_PATH=/usr/local/blackbox/lib/pkgconfig  
cd ..

tar -xvvzf bbkeys-0.9.0.tar.gz
cd bbkeys-0.9.0
./configure --prefix=/usr/local/bbkeys && make && make install

PCLinuxOS 2007-final, updated 2008-08-15 gives me:

checking for XOpenDisplay in -lX11... no
configure: error: XOpenDisplay not found in -lX11

I give up...