Hi all,
I succesfull compiled postgres 8.0beta2 with a recent gcc 4.0 snapshot:

gcc (GCC) 4.0.0 20040911 (experimental)
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


# select version();
                                                version
-----------------------------------------------------------------------------------------------------
  PostgreSQL 8.0.0beta2 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 4.0.0 20040911 (experimental)
(1 row)




All the tests passed, however I had a bunch of warning during the
compilation, the more common was: "left-hand operand of comma expression has no effect"

These are some examples:

=============================================================================
gist.c: In function `gistlayerinsert':
gist.c:463: warning: left-hand operand of comma expression has no effect
gist.c: In function `gistreadbuffer':
gist.c:644: warning: left-hand operand of comma expression has no effect
gist.c: In function `gistchoose':
gist.c:1479: warning: left-hand operand of comma expression has no effect
=============================================================================
pg_conversion.c: In function `pg_convert_using':
pg_conversion.c:334: warning: pointer targets in passing arg 1 of `strlen' differ in signedness
=============================================================================
nbtinsert.c: In function `_bt_insertonpg':
nbtinsert.c:380: warning: 'itup_blkno' may be used uninitialized in this function
nbtinsert.c:379: warning: 'itup_off' may be used uninitialized in this function
=============================================================================
pg_proc.c: In function `match_prosrc_to_query':
pg_proc.c:915: warning: pointer targets in passing arg 1 of `pg_mbstrlen_with_len' differ in signedness
pg_proc.c:929: warning: pointer targets in passing arg 1 of `pg_mbstrlen_with_len' differ in signedness
pg_proc.c: In function `match_prosrc_to_literal':
pg_proc.c:982: warning: pointer targets in passing arg 1 of `pg_mblen' differ in signedness
=============================================================================
orindxpath.c: In function `best_or_subclause_indexes':
orindxpath.c:258: warning: 'best_indexinfo' may be used uninitialized in this function
orindxpath.c:260: warning: 'best_indexquals' may be used uninitialized in this function
orindxpath.c:259: warning: 'best_indexclauses' may be used uninitialized in this function
orindxpath.c:261: warning: 'best_startup_cost' may be used uninitialized in this function
orindxpath.c:262: warning: 'best_total_cost' may be used uninitialized in this function
=============================================================================
createplan.c: In function `create_plan':
createplan.c:1244: warning: 'opclass' may be used uninitialized in this function
=============================================================================




Regards
Gaetano Mendola




Wed, 22 Sep 2004 17:06:00 +0200
Gaetano Mendola <mendola@bigfoot.com>
Postgres 8.0 with gcc 4.0 success