CVS Head parser error?

I got following with CVS Head parser. I'm using bison 2.1 and flex
2.5.35. Am I missing something?

make[3]: Entering directory `/usr/local/src/pgsql/current/pgsql/src/backend/parser'
gcc -O2 -Wall -Wmissing-prototypes -Wpointer-arith -Wendif-labels -fno-strict-aliasing -I. -I../../../src/include -D_GNU_SOURCE -c -o gram.o gram.c
In file included from gram.y:11211:
scan.c:14473: error: conflicting types for `base_yylex'
../../../src/include/parser/gramparse.h:122: error: previous declaration of `base_yylex'
scan.l: In function `base_yylex':
scan.l:354: error: `yylloc' undeclared (first use in this function)
scan.l:354: error: (Each undeclared identifier is reported only once
scan.l:354: error: for each function it appears in.)
scan.l:386: warning: implicit declaration of function `yyerror'
scan.l:404: error: `yylval' undeclared (first use in this function)
scan.l:448: error: too few arguments to function `ScanKeywordLookup'
scan.l:474: error: too few arguments to function `scanner_errposition'
scan.l:522: error: too few arguments to function `scanner_errposition'
scan.l:823: error: too few arguments to function `ScanKeywordLookup'
scan.l: At top level:
scan.l:864: error: conflicting types for `scanner_errposition'
../../../src/include/parser/gramparse.h:123: error: previous declaration of `scanner_errposition'
scan.l:889: warning: no previous prototype for `yyerror'
scan.l:889: warning: type mismatch with previous implicit declaration
scan.l:748: warning: previous implicit declaration of `yyerror'
scan.l:889: warning: `yyerror' was previously implicitly declared to return `int'
scan.l: In function `yyerror':
scan.l:890: error: `yylloc' undeclared (first use in this function)
scan.l: At top level:
scan.l:916: error: conflicting types for `scanner_init'
../../../src/include/parser/gramparse.h:119: error: previous declaration of `scanner_init'
scan.l:947: error: conflicting types for `scanner_finish'
../../../src/include/parser/gramparse.h:120: error: previous declaration of `scanner_finish'
scan.l: In function `check_unicode_value':
scan.l:1024: error: `yylloc' undeclared (first use in this function)
scan.l: In function `litbuf_udeescape':
scan.l:1041: error: `yylloc' undeclared (first use in this function)
scan.l: In function `check_string_escape_warning':
scan.l:1132: error: `yylloc' undeclared (first use in this function)
scan.l: In function `check_escape_warning':
scan.l:1157: error: `yylloc' undeclared (first use in this function)
make[3]: *** [gram.o] Error 1

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