Fatal Linux Compile Bug - smtp_in.c

Greetings,

Has anyone tackled this one yet, before I jump in? Also, I'm not really
familiar with the differences between ndbm and gdbm enough to know if
they're 1-for-1 compatible. If they are, I would suggest a "-lgdbm" in
place of "-lndbm" in the Linux stuff.

Thanks,

Allen
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gcc -c -O -I. smtp_in.c
smtp_in.c: In function `smtp_setup_msg':
smtp_in.c:576: `MAX_IPOPTLEN' undeclared (first use this function)
smtp_in.c:576: (Each undeclared identifier is reported only once
smtp_in.c:576: for each function it appears in.)
smtp_in.c:588: `IP_OPTIONS' undeclared (first use this function)
smtp_in.c:608: structure has no member named `__data'
smtp_in.c:621: `IPOPT_EOL' undeclared (first use this function)
smtp_in.c:625: `IPOPT_NOP' undeclared (first use this function)
smtp_in.c:629: warning: unreachable code at beginning of switch
statement
smtp_in.c:633: structure has no member named `faddr'
make[2]: *** [smtp_in.o] Error 1
make[2]: Leaving directory
`/home/allen/exim/exim-1.61/build-Linux-i386-linux'
make[1]: *** [makefile] Error 2
make[1]: Leaving directory
`/home/allen/exim/exim-1.61/build-Linux-i386-linux'
make: *** [makefile] Error 2