daemon.c fails to build on Darwin

If this is obvious, can someone fix it?  If not, I'll try to sort it out later
tonight.

    gcc -o daemon.o -c -g -O2 -Wall -I/sw/include -I/opt/local/include -DSHA1_HEADER='<openssl/sha.h>' -DNO_STRLCPY daemon.c
    daemon.c: In function 'fill_in_extra_table_entries':
    daemon.c:460: error: 'HOST_NAME_MAX' undeclared (first use in this function)
    daemon.c:460: error: (Each undeclared identifier is reported only once
    daemon.c:460: error: for each function it appears in.)
    daemon.c:460: warning: unused variable 'addrbuf'
    make: *** [daemon.o] Error 1

This is with 2d5b459107cf07bbb307cfb196c2007c497a6dd2.

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