wget ftp://ftp.pangeia.com.br/pub/seg/pac/chkrootkit.tar.gz compile:make sensegcc -DHAVE_LASTLOG_H -o chklastlog chklastlog.cgcc -DHAVE_LASTLOG_H -o chkwtmp chkwtmp.cchkwtmp.c: In function ?.ain?.chkwtmp.c:95: warning: incompatible implicit declaration of built-in function ?.xit?gcc -DHAVE_LASTL ...