I have a C file of the following .When I execute this in Fedora 7 version 2.6.21-1.3194.fc7 and arch =i686 I get following errors [root@kwi-11156f06184 Desktop]# cc test.c test.c:3:20: error: libipq.h: No such file or directory test.c: In function ‘main’: test.c:12: error: ‘PF_INET’ undeclared (first use in this function) test.c:12: error: (Each undeclared identifier is reported only once test.c:12: error: for each function it appears in.) test.c:12: warning: assignment makes pointer from integer without a cast [root@kwi-11156f06184 Desktop]# cc test.c -libipq.h test.c:3:20: error: libipq.h: No such file or directory test.c: In function ‘main’: test.c:12: error: ‘PF_INET’ undeclared (first use in this function) test.c:12: error: (Each undeclared identifier is reported only once test.c:12: error: for each function it appears in.) test.c:12: warning: assignment makes pointer from integer without a cast [root@kwi-11156f06184 Desktop]# cc test.c -libipq test.c:3:20: error: libipq.h: No such file or directory test.c: In function ‘main’: test.c:12: error: ‘PF_INET’ undeclared (first use in this function) test.c:12: error: (Each undeclared identifier is reported only once test.c:12: error: for each function it appears in.) test.c:12: warning: assignment makes pointer from integer without a cast [root@kwi-11156f06184 Desktop]# cc -libipq test.c test.c:3:20: error: libipq.h: No such file or directory test.c: In function ‘main’: test.c:12: error: ‘PF_INET’ undeclared (first use in this function) test.c:12: error: (Each undeclared identifier is reported only once test.c:12: error: for each function it appears in.) test.c:12: warning: assignment makes pointer from integer without a cast Code: /* c file called test.c*/ #include <linux/netfilter.h> #include <libipq.h> #include <stdio.h> int main() { int retVal = 0; char buf[1000]; struct ipq_handle* userHandle; userHandle = ipq_create_handle(0, PF_INET); if(userHandle == NULL) { printf("ipq_create_handle returned error\n"); return -1; } retVal = ipq_read(userHandle, buf, 1000, 0); return 0; } my problem is how shall I include all these header files , so that my program works any hints and suggestions prethanks to helper