When compiling tcpreplay package, the build fails if the user has libdumbnet-dev installed in the host system. 
This has been tested in ubuntu 19.04 
A workaround is to install libdnet package in buildroot.

Here is the failing code in the tcpreplay configure file:

    for testdir in $trydnetdir /usr/local /opt/local $MACOSX_SDK_PATH/usr /usr ; do
        if test -x ${testdir}/bin/dnet-config -a $founddnet = no ; then
            LDNETINC="$($testdir/bin/dnet-config --cflags)"
            LDNETLIB="$($testdir/bin/dnet-config --libs)"
            libdnet_version="$($testdir/bin/dnet-config --version)"
            founddnet=$testdir
        fi
    done



Error Logs:

/home/test/projects/buildroot-output/host/bin/aarch64-marvell-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I../../src   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I.. -I../..  -I/usr/include -D_U_="__attribute__((unused))" -Wall -std=gnu99 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2    -Wno-variadic-macros -Wfatal-errors -Wno-format-contains-nul -I/home/test/projects/buildroot-output/host/aarch64-buildroot-linux-gnu/sysroot/usr -c -o fakepoll.o fakepoll.c
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
/home/test/projects/buildroot-output/host/bin/aarch64-marvell-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I../../src   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I.. -I../..  -I/usr/include -D_U_="__attribute__((unused))" -Wall -std=gnu99 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2    -Wno-variadic-macros -Wfatal-errors -Wno-format-contains-nul -I/home/test/projects/buildroot-output/host/aarch64-buildroot-linux-gnu/sysroot/usr -c -o xX.o xX.c
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: cidr.o] Error 1
make[6]: *** Waiting for unfinished jobs....
make[6]: *** [Makefile:448: err.o] Error 1
make[6]: *** [Makefile:448: list.o] Error 1
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: cache.o] Error 1
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: services.o] Error 1
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: get.o] Error 1
make[6]: *** [Makefile:448: fakepcap.o] Error 1
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: fakepcapnav.o] Error 1
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: fakepoll.o] Error 1
aarch64-marvell-linux-gnu-gcc: ERROR: unsafe header/library path used in cross-compilation: '-I/usr/include'
make[6]: *** [Makefile:448: xX.o] Error 1
make[5]: *** [Makefile:372: all] Error 2
make[4]: *** [Makefile:1147: all-recursive] Error 1
make[3]: *** [Makefile:559: all] Error 2
make[2]: *** [Makefile:437: all-recursive] Error 1
make[1]: *** [package/pkg-generic.mk:232: /home/test/projects/buildroot-output/build/tcpreplay-4.2.6/.stamp_built] Error 2
make: *** [Makefile:23: _all] Error 2