[HACKERS] compiling pg 7.0.3 on sco 5.0.5

[Arno A. Karner]

ive got the backend stuff to compile on sco with the sdk had to add
-lsocket 
to get rid of unresolved var gethostbyaddress. made it as far as
compiling 
epcg compiles but fails with unresolved var
nocachegetattr in pgc.o
is this a yacc/lex issue if so what would be min version requirements
for 
bison/flex replacments, easiest to port to sco 5.0.5

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