Mine

gcc -g -O2 -o .libs/callweaver callweaver-main.o  ./corelib/.libs/libcallweaver.so -lspandsp -ltiff -L/usr/lib -lssl -lcrypto /usr/src/callweaver-1.2.0_rc4/sqlite3-embedded/.libs/libcwsqlite3.so /usr/src/callweaver-1.2.0_rc4/corelib/jitterbuffer/.libs/libcwjb.so ./libltdl/.libs/libltdlc.a -ldl -lrt -lresolv -lpthread -lnsl -lreadline -lncurses -lm -ldb -lc  -Wl,--rpath -Wl,/usr/local/lib/callweaver
./corelib/.libs/libcallweaver.so: undefined reference to `adsi_put_message'
./corelib/.libs/libcallweaver.so: undefined reference to `adsi_send_alert_tone'
collect2: ld returned 1 exit status
make[1]: *** [callweaver] Error 1
make[1]: Leaving directory `/usr/src/callweaver-1.2.0_rc4'
make: *** [all-recursive] Error 1
[root@centos76 callweaver-1.2.0_rc4]#