Re: Complier warnings on mingw gcc 4.5.0

On 12/13/2010 04:34 PM, Tom Lane wrote:
> Andrew Dunstan<andrew@dunslane.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....]@.@......h    0x0010:  c0a8 0a6d 878c
1538a55b 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
6f675f6d 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.....@....K...m    0x0010:  c0a8 0a68
1538878c 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
20626520 6368 616e  ".cannot.be.chan    0x0070:  6765 6420 7769 7468 6f75 7420 7265 7374  ged.without.rest    0x0080:
61727469 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