Hello everybody
I have a problem about c compiling.Program has a few header files ,string.h,stdlib.h,libnet.h,ncurses.h ...
and I compiled this program with gcc but I takes a few error like this.I cant understand where the problem is...help me

linux:/home/wampire/programlama/c/tcp-ip # gcc gopack.c -o gopack /usr/lib/libnet.a -lncurses -lstring
gopack.c: In function ‘main’:
gopack.c:79: warning: pointer targets in passing argument 2 of ‘libnet_name2addr4’ differ in signedness
gopack.c:84: warning: pointer targets in passing argument 2 of ‘libnet_name2addr4’ differ in signedness
gopack.c:202:2: warning: no newline at end of file
/usr/lib/gcc/i586-suse-linux/4.0.2/../../../../i586-suse-linux/bin/ld: cannot open output file gopack: Is a directory
collect2: ld returned 1 exit status

If it's not too large, could you post the source file? I could be completely wrong, but it looks like you're trying to pass a pointer to a signed int to libnet_name2addr4 when it requires an unsigned int, or something similar (could also be the other way around). It also seems that the file you're trying to output it to (gopack) is a directory - just give the binary a different name or rename the folder.

to get a good response type the code then the error msg you get, you have a lot of room on the post

1. These are not errors, they're merely warnings:2. This is just a warning, too. To fix it, simply add a blank line after the last source line in CODEgopack.c. Believe it or not, it's a legitimate warning (although it's very unlikely it would ever cause you a real problem):3. This is a real, bona fide error:It looks like you've got a directory named "gopack" where the linker wants to create a new program file called "gopack". You can remove the directory, write the file someplace else, or rename the executable (e.g. "-o something_else").

'Hope that helps .. PSM

PS:
You seem to be logged in and compiling as "root" (the "#" prompt). Generally *not* a good practice...