Re: Complier warnings on mingw gcc 4.5.0

On 12/13/2010 04:34 PM, Tom Lane wrote:
> Andrew Dunstan<andrew(at)dunslane(dot)net> writes:
>> Further digging shows some weirdness. This doesn't appear to be
>> compiler-related. I've rolled back all the way to gcc 3.5. It is
>> triggered by the following line in pg_regress.c, commenting out of which
>> causes the problem to go away (although of course it causes the
>> regression tests to fail):
>> putenv(new_pgoptions);
> Oh really ... are we using src/port/unsetenv.c on that platform?
> I wonder if that little hack is incompatible with latest mingw
> libraries ...

It is using pgwin32_putenv() and pgwin32_unsetenv(). It appears not to
be related to how the environment is set at all, but to how the backend
is handling PGOPTIONS.

Here's a TCP level dump of traffic showing the problem. The client is on
Linux.

18:34:03.106882 IP aurelia.34700 > 192.168.10.109.postgres: Flags [P.],
seq 9:86, ack 2, win 46, options [nop,nop,TS val 1504831233 ecr
1085898], length 77
0x0000: 4500 0081 f95d 4000 4006 aaf3 c0a8 0a68 E(dot)(dot)(dot)(dot)](at)(dot)@......h
0x0010: c0a8 0a6d 878c 1538 a55b 18ce c920 b723 ...m...8.[.....#
0x0020: 8018 002e 07ae 0000 0101 080a 59b1 e701 ............Y...
0x0030: 0010 91ca 0000 004d 0003 0000 7573 6572 .......M....user
0x0040: 0070 6772 756e 6e65 7200 6461 7461 6261 .pgrunner.databa
0x0050: 7365 0070 6f73 7467 7265 7300 6f70 7469 se.postgres.opti
0x0060: 6f6e 7300 2d63 206c 6f67 5f6d 696e 5f6d ons.-c.log_min_m
0x0070: 6573 7361 6765 733d 7761 726e 696e 6700 essages=warning.
0x0080: 00 .
18:34:03.209847 IP 192.168.10.109.postgres > aurelia.34700: Flags [P.],
seq 2:129, ack 86, win 65450, options [nop,nop,TS val 1085900 ecr
1504831233], length 127
0x0000: 4500 00b3 9fd3 4000 8006 c44b c0a8 0a6d E(dot)(dot)(dot)(dot)(dot)(at)(dot)(dot)(dot)(dot)K(dot)(dot)(dot)m
0x0010: c0a8 0a68 1538 878c c920 b723 a55b 191b ...h.8.....#.[..
0x0020: 8018 ffaa df54 0000 0101 080a 0010 91cc .....T..........
0x0030: 59b1 e701 5200 0000 0800 0000 0045 0000 Y...R........E..
0x0040: 0075 5346 4154 414c 0043 3535 5030 3200 .uSFATAL.C55P02.
0x0050: 4d70 6172 616d 6574 6572 2022 706f 7274 Mparameter."port
0x0060: 2220 6361 6e6e 6f74 2062 6520 6368 616e ".cannot.be.chan
0x0070: 6765 6420 7769 7468 6f75 7420 7265 7374 ged.without.rest
0x0080: 6172 7469 6e67 2074 6865 2073 6572 7665 arting.the.serve
0x0090: 7200 4667 7563 2e63 004c 3437 3934 0052 r.Fguc.c.L4794.R
0x00a0: 7365 745f 636f 6e66 6967 5f6f 7074 696f set_config_optio
0x00b0: 6e00 00 n..

cheers

andrew