> The error I get when I issue 'make build_httrack.lib' is:
> No rule to make target 'httracklib.o' needed 
by 'build_lib'

First test the lib/example.c example:

cd /tmp/httrack-3.20/src
./configure -- make --install
cd /tmp/httrack-3.20/lib
ln -s ../src
echo "#define HTS_ANALYSTE 1" >> src/htssystem.h
gcc example.c -lhttrack
./a.out
 HTTrackLib test program
 Enter URL (example: www.foobar.com/index.html) :

Then, you can create your own .so (which will need 
libhttrack.so.1 as shared object)