error when trying to compile and install

[ysrc26]

hey,
i'm trying to build according the install file instructions but i get error.
after ./configure that working well, i try "make" and it's failed with the following error:

securityonion@securityonion-virtual-machine:/Desktop/nfex-master$ make
Making all in src
make[1]: Entering directory /home/securityonion/Desktop/nfex-master/src' gcc -DHAVE_CONFIG_H -I. -I../include -D_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -ggdb -MT main.o -MD -MP -MF .deps/main.Tpo -c -o main.o main.c In file included from main.c:12:0: ../include/nfex.h:16:18: fatal error: pcap.h: No such file or directory compilation terminated. make[1]: *** [main.o] Error 1 make[1]: Leaving directory/home/securityonion/Desktop/nfex-master/src'
make: *** [all-recursive] Error 1
securityonion@securityonion-virtual-machine:/Desktop/nfex-master$

which pcap.h file needed?

[mschiffm]

Which OS? Please send me the output of ./configure.