compile warnings in CVS HEAD?

I'm seeing the following with the current CVS code on my Linux dev box:

$ make maintainer-clean
$ ./configure --enable-depend --enable-cassert --enable-debug
--prefix=/pgsql --with-openssl
[ ... ]
$ make -s
In file included from bootparse.y:340:
lex.Int_yy.c:1832: warning: no previous prototype for `Int_yyget_lineno'
lex.Int_yy.c:1841: warning: no previous prototype for `Int_yyget_in'
lex.Int_yy.c:1849: warning: no previous prototype for `Int_yyget_out'
lex.Int_yy.c:1857: warning: no previous prototype for `Int_yyget_leng'
lex.Int_yy.c:1866: warning: no previous prototype for `Int_yyget_text'
lex.Int_yy.c:1875: warning: no previous prototype for `Int_yyset_lineno'
lex.Int_yy.c:1887: warning: no previous prototype for `Int_yyset_in'
lex.Int_yy.c:1892: warning: no previous prototype for `Int_yyset_out'
lex.Int_yy.c:1897: warning: no previous prototype for `Int_yyget_debug'
lex.Int_yy.c:1902: warning: no previous prototype for `Int_yyset_debug'
lex.Int_yy.c:1908: warning: no previous prototype for
`Int_yylex_destroy'
In file included from gram.y:8094:
scan.c:6021: warning: no previous prototype for `base_yyget_lineno'
scan.c:6030: warning: no previous prototype for `base_yyget_in'
scan.c:6038: warning: no previous prototype for `base_yyget_out'
scan.c:6046: warning: no previous prototype for `base_yyget_leng'
scan.c:6055: warning: no previous prototype for `base_yyget_text'
scan.c:6064: warning: no previous prototype for `base_yyset_lineno'
scan.c:6076: warning: no previous prototype for `base_yyset_in'
scan.c:6081: warning: no previous prototype for `base_yyset_out'
scan.c:6086: warning: no previous prototype for `base_yyget_debug'
scan.c:6091: warning: no previous prototype for `base_yyset_debug'
scan.c:6097: warning: no previous prototype for `base_yylex_destroy'
tablecmds.c: In function `validateForeignKeyConstraint':
tablecmds.c:3546: warning: dereferencing type-punned pointer will break
strict-a                                                                                                 liasing rules
execQual.c: In function `ExecMakeFunctionResult':
execQual.c:737: warning: dereferencing type-punned pointer will break
strict-ali                                                                                                    asing
rules
execQual.c: In function `ExecMakeTableFunctionResult':
execQual.c:983: warning: dereferencing type-punned pointer will break
strict-ali                                                                                                    asing
rules
proc.c: In function `enable_sig_alarm':
proc.c:1016: warning: dereferencing type-punned pointer will break 
strict-aliasi                                                                                                 ng rules
proc.c: In function `disable_sig_alarm':
proc.c:1057: warning: dereferencing type-punned pointer will break
strict-aliasi                                                                                                    ng
rules
proc.c: In function `CheckStatementTimeout':
proc.c:1123: warning: dereferencing type-punned pointer will break
strict-aliasi                                                                                                    ng
rules
In file included from guc.c:4390:
lex.GUC_yy.c:1586: warning: no previous prototype for `GUC_yyget_lineno'
lex.GUC_yy.c:1595: warning: no previous prototype for `GUC_yyget_in'
lex.GUC_yy.c:1603: warning: no previous prototype for `GUC_yyget_out'
lex.GUC_yy.c:1611: warning: no previous prototype for `GUC_yyget_leng'
lex.GUC_yy.c:1620: warning: no previous prototype for `GUC_yyget_text'
lex.GUC_yy.c:1629: warning: no previous prototype for `GUC_yyset_lineno'
lex.GUC_yy.c:1641: warning: no previous prototype for `GUC_yyset_in'
lex.GUC_yy.c:1646: warning: no previous prototype for `GUC_yyset_out'
lex.GUC_yy.c:1651: warning: no previous prototype for `GUC_yyget_debug'
lex.GUC_yy.c:1656: warning: no previous prototype for `GUC_yyset_debug'
lex.GUC_yy.c:1662: warning: no previous prototype for
`GUC_yylex_destroy'
[ tsort output omitted ]
All of PostgreSQL successfully made. Ready to install.
$ gcc --version
gcc (GCC) 3.3.2 20030831 (Debian prerelease)
$ bison --version
bison (GNU Bison) 1.875a
$ flex --version
flex 2.5.31

Does this reproduce for anyone else?

-Neil