Error building Hobbit 4.0

Received the following error building Hobbit 4.0:

make[1]: Entering directory `/home/hobbit/hobbit-4.0/bbnet'
gcc -g -O2 -Wall -Wno-unused -D_REENTRANT  -DMAXMSG=32768 
-DBBDPORTNUMBER=1984 -I. -I/home/hobbit/hobbit-4.0/include -DHOBBITD=1 
    -c -o bbtest-net.o bbtest-net.c
bbtest-net.c: In function `start_fping_service':
bbtest-net.c:1129: error: `errno' undeclared (first use in this function)
bbtest-net.c:1129: error: (Each undeclared identifier is reported only once
bbtest-net.c:1129: error: for each function it appears in.)
make[1]: *** [bbtest-net.o] Error 1
make[1]: Leaving directory `/home/hobbit/hobbit-4.0/bbnet'
make: *** [bbnet-build] Error 2

-- 
Rich Smrcina
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