gcc -O2     bbslogin.c   -o bbslogin
/tmp/cc8ygh1a.o(.text+0x3a09): In function `main':
: undefined reference to `genbuf'
/tmp/cc8ygh1a.o(.text+0x3a1d): In function `main':
: undefined reference to `genbuf'
collect2: ld returned 1 exit status
make: *** [bbslogin] Error 1

？如何修改？
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