I am trying to install httrack on CentOS, and I'm getting the same problems as
others have gotten: 

gcc -g -O2 -o httrack httrack.o  -L/usr/lib -lpthread -lhttrack -lz
/usr/bin/ld: cannot find -lhttrack
collect2: ld returned 1 exit status

I put some time in searching for the answer, but I haven't found the
solution.

Can anyone tellme what specifically causes this problem, how to fix it, or
point me to the solution?
Thank you.