tcpdump doesn't appear to call any libpcap's exported function

Digging into tcpdump implementation, I can see that it actually loads the libpcap.so dynamic library in userspace. However, by use of strace, I can't see any occurrence of calls to any function exported by libpcap. Is the above an expected behaviour of tcpdump? Thank you. root@eve-ng02:~# tcpdump --help tcpdump version 4.9.2 libpcap version 1.7.4 OpenSSL 1.0.2g 1 Mar 2016 Edit: from received comments I tried with ltrace but it seems no call to dynamic library is done as well. root@eve-ng02:~# ltrace tcpdump -i lo tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on lo, link-type EN10MB (Ethernet), capture size 262144 bytes ^C--- SIGINT (Interrupt) --- 0 packets captured 126 packets received by filter 98 packets dropped by kernel +++ exited (status 0) +++ root@eve-ng02:~#