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Re: Building nmap/ncat on Ubuntu
From: David Fifield <david () bamsoftware com>
Date: Tue, 12 May 2009 18:42:11 -0600

On Tue, May 05, 2009 at 08:58:20PM -0700, Corey Chandler wrote:
So I finally took the plunge, and dipped my toes into the Ubuntu river  
(so that makes nmap test environments of MacOS X, FreeBSD, CentOS, and  
now Ubuntu-- phew!).  My own opinions aside, I'm having a bit of  
difficulty getting nmap to compile from SVN-- it chokes on what looks  
like a flex error, but flex is already installed; any advice would be  
appreciated.

I've already installed gcc-g++, bison, openssl's development libraries,  
and flex (as a shot in the dark):

../libpcap/libpcap.a(gencode.o): In function `pcap_compile':
/home/jchandler/sources/nmap/libpcap/./gencode.c:382: undefined  
reference to `lex_init'
/home/jchandler/sources/nmap/libpcap/./gencode.c:384: undefined  
reference to `pcap_parse'
/home/jchandler/sources/nmap/libpcap/./gencode.c:401: undefined  
reference to `lex_cleanup'
/home/jchandler/sources/nmap/libpcap/./gencode.c:368: undefined  
reference to `lex_cleanup'
../libpcap/libpcap.a(grammar.o): In function `yyparse':
/home/jchandler/sources/nmap/libpcap/y.tab.c:1877: undefined reference  
to `yylex'
collect2: ld returned 1 exit status
make[1]: *** [ncat] Error 1
make[1]: Leaving directory `/home/jchandler/sources/nmap/ncat'
make: *** [ncat_build] Error 2
jchandler () Conscience:~/sources/nmap$

Maybe try "make distclean" in libpcap and reconfigure. If that doesn't
work, "make distclean" again, reconfigure, then "touch scanner.c". That
ought to keep scanner.c from being regenerated.

David Fifield

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