Solaris Compile problems

I'm on a SunOS 5.6 trying to compile postgres 6.3.2 with no root access and the
command line of:

./configure --prefix=/my_path/pgsql --with-template=sparc_solaris-gcc

Any idea why I'm getting the following error?

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gcc -I../../../include -I../../../backend     -Wall -Wmissing-prototypes
-I../include -DMAJOR_VERSION=1 -DMINOR_VERSION=1 -DPATCHLEVEL=0
-DINCLUDE_PATH=\"/my_path/pgsql/include\"   -c y.tab.c -o
y.tab.o
/usr/ccs/bin/yaccpar: In function `yyparse':
/usr/ccs/bin/yaccpar:274: warning: implicit declaration of function `yylex'
/usr/ccs/bin/yaccpar:374: warning: label `yyerrlab' defined but not used
/usr/ccs/bin/yaccpar:164: warning: label `yynewstate' defined but not used
lex  -t pgc.l > pgc.c
"pgc.l":line 26: Error: missing translation value
make[3]: *** [pgc.c] Error 1
rm pgc.c
make[3]: Leaving directory
`/my_path/src/postgresql-6.3.2/src/interfaces/ecpg/preproc'
make[2]: *** [all] Error 2
make[2]: Leaving directory
`/my_path/src/postgresql-6.3.2/src/interfaces/ecpg'
make[1]: *** [all] Error 2
make[1]: Leaving directory
`/my_path/src/postgresql-6.3.2/src/interfaces'
make: *** [all] Error 2
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