nmap-2.54b{25,33} SIGSEGV on sparc64-3.1

[Gregory Steuck <greg_(_at_)_nest_(_dot_)_cx>]

[greg_(_at_)_tidy nmap]$ sudo nmap -sU localhost

Starting nmap V. 2.54BETA25 ( www.insecure.org/nmap/ )
caught SIGSEGV signal, cleaning up

... when it tries to ping the scanned system. The root cause of SEGV is
nmap compiling with it's own pcap.h and then linking with the system
libpcap.so. Just compare the size of pcap_pkthdr inside libpcap (16) and
in nmap (24).

If I do a barbarian modification to the port's Makefile (below), I get a
working nmap. Could somebody do it cleaner?

Thanks
Greg

P.S. IMO nmap code is ugly.

Index: Makefile
===================================================================
RCS file: /cvs/ports/net/nmap/Makefile,v
retrieving revision 1.40
diff -u -r1.40 Makefile
--- Makefile    2002/04/28 20:36:02     1.40
+++ Makefile    2002/05/20 23:18:01
@@ -19,8 +19,9 @@
 PERMIT_DISTFILES_FTP=  Yes
 
 CONFIGURE_STYLE= gnu dest
-MODGNU_CONFIG_GUESS_DIRS=      ${WRKSRC} ${WRKSRC}/nbase ${WRKSRC}/libpcap-possiblymodified
+MODGNU_CONFIG_GUESS_DIRS=      ${WRKSRC} ${WRKSRC}/nbase
 
+CONFIGURE_ARGS=        --with-libpcap=/usr
 FLAVORS=       no_x11
 FLAVOR?=