error about tcl/tk

dear all

i compiled postgresql7.4 ,but when type in make ,error appeared as following:

bison -y -d gram.y
NONE:0: /usr/bin/m4: ERROR: EOF in string
sed -e 's/yy/plpgsql_yy/g' -e 's/YY/PLPGSQL_YY/g' < y.tab.c > ./pl_gram.c
/bin/sh: line 1: y.tab.c: No such file or directory
make[4]: *** [pl.tab.h] Error 1
make[4]: Leaving directory `/home/sm/pgsql7.4/src/pl/plpgsql/src'
make[3]: *** [all] Error 2

before this ,i configure like this :
./configure --enable-multibyte --with-tcl --with-tclconfig=
/usr/local/lib --with-tkconfig=/usr/local/lib
(see at http://member.melbpc.org.au/~bradmac/postgreSQL.html#LtohTOCentry-2)
i have already intalled tck8.4.5 and tk8.4.5

would you please tell what's the matter with my postgres? thanks :)

　　　　　　　　致
礼！

　　　　　　　　帅猛
　　　　　　　　shuaimeng(at)db(dot)pku(dot)edu(dot)cn
　　　　　　　　　　2004-04-29