how to install pacgen

[sabagour03]

Hi,
I am a newbie to Linux.I am trying to install Pacgen. Steps for installing pacgen are as follows:
1. Make sure you have Libnet installed, pacgen was written with 1.1.2.1
installed.

2. Read the README file

3. Compile via the libnet-config script (at least this is how I did it):

gcc `libnet-config --cflags --defines` pacgen.c -o pacgen \
`libnet-config --libs`

4. Or for the lazy run the install.sh script

I have installed Libnet 1.1.2.1
when I compile via libnet-configure,I get the prompt '>' .I do not know how to proceed furthur
I would be happy to receive any information or instructions on installing pacgen

[sabagour03]

But when I type the command ,I get the following error
[sabagour03@sabanyupoly pacgen-1.10]$ gcc `libnet-config --cflags --defines` pacgen.c -o pacgen `libnet-config --libs`
bash: libnet-config: command not found
bash: libnet-config: command not found
/tmp/ccRE2XbO.o: In function `main':
pacgen.ctext+0x24): undefined reference to `libnet_init'
pacgen.c.text+0x214): undefined reference to `libnet_build_tcp'
pacgen.c.text+0x239): undefined reference to `libnet_geterror'
pacgen.c.text+0x2c9): undefined reference to `libnet_build_udp'
pacgen.c.text+0x2ee): undefined reference to `libnet_geterror'
pacgen.c.text+0x3d0): undefined reference to `libnet_build_ipv4'
pacgen.c.text+0x3ec): undefined reference to `libnet_geterror'
pacgen.c.text+0x450): undefined reference to `libnet_build_ethernet'
pacgen.c.text+0x46c): undefined reference to `libnet_geterror'
pacgen.c.text+0x4fc): undefined reference to `libnet_write'
pacgen.ctext+0x59c): undefined reference to `libnet_destroy'
pacgen.c.text+0x5a9): undefined reference to `libnet_destroy'
/tmp/ccRE2XbO.o: In function `load_ip':
pacgen.ctext+0xf49): undefined reference to `libnet_name2addr4'
pacgen.c.text+0xf6d): undefined reference to `libnet_name2addr4'
collect2: ld returned 1 exit status

I would be happy to receive any information or instructions on installing pacgen.Please can you suggest packet injection tools that have programmable time intervals between packets.

Regards to all