Nmap 4.20 won't compile on Macos X 10.4.9 due to libpcap errors

[James Kelly <macubergeek () comcast net>]

Macos 10.4.9
Developer tools v. xcode_2.4.1_8m1910_6936315.dmg

configure kicks out this warning:
configure: WARNING: net/if.h: present but cannot be compiled
configure: WARNING: net/if.h:     check for missing prerequisite  
headers?
configure: WARNING: net/if.h: see the Autoconf documentation
configure: WARNING: net/if.h:     section "Present But Cannot Be  
Compiled"
configure: WARNING: net/if.h: proceeding with the preprocessor's result
configure: WARNING: net/if.h: in the future, the compiler will take  
precedence
configure: WARNING:     ## ------------------------------------------ ##
configure: WARNING:     ## Report this to the AC_PACKAGE_NAME lists.  ##
configure: WARNING:     ## ------------------------------------------ ##

make kicks out this:
@Xmac->make
Compiling libpcap
gcc -g -O2 -fno-common -I/sw/include -fno-strict-aliasing -I.  - 
DHAVE_CONFIG_H  -D_U_="__attribute__((unused))" -c ./pcap-bpf.c
In file included from ./pcap-bpf.c:95:
./pcap-int.h:163: error: parse error before 'pcap_direction_t'
./pcap-int.h:163: warning: no semicolon at end of struct or union
./pcap-int.h:171: error: parse error before 'pcap_direction_t'
./pcap-int.h:188: error: parse error before '}' token
./pcap-bpf.c:108: error: parse error before 'pcap_direction_t'
./pcap-bpf.c: In function 'pcap_stats_bpf':
./pcap-bpf.c:129: error: dereferencing pointer to incomplete type
./pcap-bpf.c:130: error: dereferencing pointer to incomplete type
./pcap-bpf.c: In function 'pcap_read_bpf':
./pcap-bpf.c:152: error: dereferencing pointer to incomplete type
./pcap-bpf.c:152: error: dereferencing pointer to incomplete type
./pcap-bpf.c:157: error: dereferencing pointer to incomplete type
./pcap-bpf.c:163: error: dereferencing pointer to incomplete type
./pcap-bpf.c:166: error: dereferencing pointer to incomplete type
./pcap-bpf.c:167: error: dereferencing pointer to incomplete type
./pcap-bpf.c:168: error: dereferencing pointer to incomplete type
./pcap-bpf.c:168: error: dereferencing pointer to incomplete type
./pcap-bpf.c:168: error: dereferencing pointer to incomplete type
./pcap-bpf.c:219: error: dereferencing pointer to incomplete type
./pcap-bpf.c:223: error: dereferencing pointer to incomplete type
./pcap-bpf.c:225: error: dereferencing pointer to incomplete type
./pcap-bpf.c:247: error: dereferencing pointer to incomplete type
./pcap-bpf.c:249: error: dereferencing pointer to incomplete type
./pcap-bpf.c:252: error: dereferencing pointer to incomplete type
./pcap-bpf.c:253: error: dereferencing pointer to incomplete type
./pcap-bpf.c:304: error: dereferencing pointer to incomplete type
./pcap-bpf.c:305: error: dereferencing pointer to incomplete type
./pcap-bpf.c:316: error: dereferencing pointer to incomplete type
./pcap-bpf.c: In function 'pcap_inject_bpf':
./pcap-bpf.c:325: error: dereferencing pointer to incomplete type
./pcap-bpf.c:348: error: dereferencing pointer to incomplete type
./pcap-bpf.c:349: error: dereferencing pointer to incomplete type
./pcap-bpf.c:358: error: dereferencing pointer to incomplete type
./pcap-bpf.c:362: error: dereferencing pointer to incomplete type
./pcap-bpf.c: In function 'pcap_open_live':
./pcap-bpf.c:610: error: dereferencing pointer to incomplete type
./pcap-bpf.c:616: error: dereferencing pointer to incomplete type
./pcap-bpf.c:621: error: dereferencing pointer to incomplete type
./pcap-bpf.c:622: error: dereferencing pointer to incomplete type
./pcap-bpf.c:737: error: dereferencing pointer to incomplete type
./pcap-bpf.c:816: error: dereferencing pointer to incomplete type
./pcap-bpf.c:816: error: dereferencing pointer to incomplete type
./pcap-bpf.c:817: error: dereferencing pointer to incomplete type
./pcap-bpf.c:821: error: dereferencing pointer to incomplete type
./pcap-bpf.c:822: error: dereferencing pointer to incomplete type
./pcap-bpf.c:823: error: dereferencing pointer to incomplete type
./pcap-bpf.c:824: error: dereferencing pointer to incomplete type
./pcap-bpf.c:854: error: dereferencing pointer to incomplete type
./pcap-bpf.c:920: error: dereferencing pointer to incomplete type
./pcap-bpf.c:931: error: dereferencing pointer to incomplete type
./pcap-bpf.c:932: error: dereferencing pointer to incomplete type
./pcap-bpf.c:932: error: dereferencing pointer to incomplete type
./pcap-bpf.c:933: error: dereferencing pointer to incomplete type
./pcap-bpf.c:960: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1002: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1002: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1010: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1014: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1015: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1016: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1017: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1018: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1019: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1020: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1021: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1022: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1027: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1028: error: dereferencing pointer to incomplete type
./pcap-bpf.c: In function 'pcap_setfilter_bpf':
./pcap-bpf.c:1058: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1065: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1070: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1071: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1075: error: dereferencing pointer to incomplete type
./pcap-bpf.c:1083: error: dereferencing pointer to incomplete type
./pcap-bpf.c: At top level:
./pcap-bpf.c:1092: error: parse error before 'pcap_direction_t'
./pcap-bpf.c: In function 'pcap_setdirection_bpf':
./pcap-bpf.c:1101: error: 'd' undeclared (first use in this function)
./pcap-bpf.c:1101: error: (Each undeclared identifier is reported  
only once
./pcap-bpf.c:1101: error: for each function it appears in.)
./pcap-bpf.c:1101: error: 'PCAP_D_OUT' undeclared (first use in this  
function)
./pcap-bpf.c:1102: error: 'p' undeclared (first use in this function)
./pcap-bpf.c:1107: error: 'PCAP_D_INOUT' undeclared (first use in  
this function)
make[1]: *** [pcap-bpf.o] Error 1
make: *** [libpcap/libpcap.a] Error 2


I tried using ./configure --with-libpcap=/usr/local/lib as well as
./configure --with-libpcap=/opt/local/lib (I have MacPorts installed)
Neither works.

Any suggestions would be appreciated.

Jim

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