Compile problem on FreeBSD/Alpha

CVS Tip:

gmake[3]: Entering directory
`/home/chriskl/pgsql-head/src/backend/bootstrap'
gcc -pipe -O -g -Wall -Wmissing-prototypes -Wmissing-declarations -I.
-I../../../src/include -c -o bootparse.o bootparse.c -MMD
In file included from bootscanner.l:43,
from bootparse.y:339:
bootstrap_tokens.h:8: conflicting types for `YYSTYPE'
bootparse.y:87: previous declaration of `YYSTYPE'
bootstrap_tokens.h:37: conflicting types for `Int_yylval'
/usr/local/share/bison.simple:138: previous declaration of `Int_yylval'
gmake[3]: *** [bootparse.o] Error 1
gmake[3]: Leaving directory
`/home/chriskl/pgsql-head/src/backend/bootstrap'
gmake[2]: *** [bootstrap-recursive] Error 2
gmake[2]: Leaving directory `/home/chriskl/pgsql-head/src/backend'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/home/chriskl/pgsql-head/src'
gmake: *** [all] Error 2
chriskl(at)alpha:~/pgsql-head$

chriskl(at)alpha:~/pgsql-head$ bison --version
GNU Bison version 1.28

What's up?

Chris