I downloaded and installed libnet-1.0.2a-2.i386.rpm , then I ran ./configure ...It didn`t error out. Then, I tried to run >>make .. I got the following error .. syslog-ng-2.0.4]# make make all-recursive make[1]: Entering directory `/root/Desktop/syslog/syslog-ng-2.0.4' Making all in src make[2]: Entering directory `/root/Desktop/syslog/syslog-ng-2.0.4/src' if gcc -DHAVE_CONFIG_H -I. -I. -I.. -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/local/include/eventlog -D_BSD_SOURCE -D__BSD_SOURCE -D__FAVOR_BSD -DHAVE_NET_ETHERNET_H -DLIBNET_LIL_ENDIAN -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -g -O2 -Wall -g -MT cfg-grammar.o -MD -MP -MF ".deps/cfg-grammar.Tpo" \ -c -o cfg-grammar.o `test -f 'cfg-grammar.c' || echo './'`cfg-grammar.c; \ then mv -f ".deps/cfg-grammar.Tpo" ".deps/cfg-grammar.Po"; \ else rm -f ".deps/cfg-grammar.Tpo"; exit 1; \ fi In file included from /home/bazsi/zwa/git//syslog-ng/syslog-ng--mainline--2.0/src/cfg-grammar. y:15: afinet.h:61: error: syntax error before "libnet_t" afinet.h:61: warning: no semicolon at end of struct or union afinet.h:63: warning: type defaults to `int' in declaration of `AFInetDestDriver' afinet.h:63: warning: data definition has no type or storage class /home/bazsi/zwa/git//syslog-ng/syslog-ng--mainline--2.0/src/cfg-grammar. y: In function `yyparse': /home/bazsi/zwa/git//syslog-ng/syslog-ng--mainline--2.0/src/cfg-grammar. y:590: error: syntax error before ')' token /home/bazsi/zwa/git//syslog-ng/syslog-ng--mainline--2.0/src/cfg-grammar. y:623: error: syntax error before ')' token make[2]: *** [cfg-grammar.o] Error 1 make[2]: Leaving directory `/root/Desktop/syslog/syslog-ng-2.0.4/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/root/Desktop/syslog/syslog-ng-2.0.4' make: *** [all] Error 2