I am trying to compile a C program, while linking the APR library. I am getting the following error message: cc -g -Wall -pthread -I/usr/local/apr/include/apr-1 -I/usr/local/apr/include/apr-util-1 -L/usr/local/apr/lib -L .aprutil-1 -L .apr-1 devpkg.c bstrlib.o db.o shell.o commands.o -o devpkg /tmp/cczC53x5.o: In function `main’: /home/yotam/Dropbox/Development/C/devpkg/devpkg.c:14: undefined reference to `apr_pool_initialize’ /home/yotam/Dropbox/Development/C/devpkg/devpkg.c:15: undefined reference to `apr_pool_create_ex’ /home/yotam/Dropbox/Development/C/devpkg/devpkg.c:29: undefined reference to `apr_getopt_init’ /home/yotam/Dropbox/Development/C/devpkg/devpkg.c:31: undefined reference