11From: Zeugswetter Andreas <ZeugswetterA@spardat.at>
2- $Date:2002/11/12 20:02:32 $
2+ $Date:2005/07/30 03:39:27 $
33
44On AIX 4.3.2 PostgreSQL compiled with the native IBM compiler xlc
55(vac.C 5.0.1) passes all regression tests. Other versions of OS and
@@ -18,3 +18,79 @@ Compiling PostgreSQL with gcc (2.95.3) on AIX also works.
1818You need libm.a that is in the fileset bos.adt.libm. (Try the
1919following command.)
2020$ lslpp -l bos.adt.libm
21+
22+
23+ ---
24+ From: Christopher Browne <cbbrowne@ca.afilias.info>
25+ Date: 2005-07-15
26+
27+ On AIX 5.3, there have been some problems getting PostgreSQL to
28+ compile and run using GCC.
29+
30+ 1. You will want to use a version of GCC subsequent to 3.3.2,
31+ particularly if you use a prepackaged version. We had good
32+ success with 4.0.1.
33+
34+ Problems with earlier versions seem to have more to do with the
35+ way IBM packaged GCC than with actual issues with GCC, so that if
36+ you compile GCC yourself, you might well have success with an
37+ earlier version of GCC.
38+
39+ 2. AIX 5.3 has a problem where sockadr_storage is not defined to be
40+ large enough. In version 5.3, IBM increased the size of
41+ sockaddr_un, the address structure for UNIX Domain Sockets, but
42+ did not correspondingly increase the size of sockadr_storage.
43+
44+ The result of this is that attempts to use UDS with PostgreSQL
45+ lead to libpq overflowing the data structure. TCP/IP connections
46+ work OK, but not UDS, which prevents the regression tests from
47+ working.
48+
49+ The nonconformance may be readily demonstrated by compiling and
50+ running the following C program which calculates and compares the
51+ sizes of the various structures:
52+
53+ test_size.c
54+ ------------
55+
56+ ---------- snip here - test_size.c ----------------------------
57+ #include <stdio.h>
58+ #include <sys/un.h>
59+ #include <sys/socket.h>
60+ int main (int argc, char *argv[]) {
61+ struct sockaddr_storage a;
62+ struct sockaddr_un b;
63+ printf("Size of sockadr_storage: %d\n", sizeof(a));
64+ printf ("Size of sockaddr_un:%d\n", sizeof(b));
65+
66+ if (sizeof(a) >= sizeof(b))
67+ printf ("Conformant to RFC 3493\n");
68+ else
69+ printf ("Non-conformant to RFC 3493\n");
70+ }
71+ ---------- snip here - test_size.c ----------------------------
72+
73+
74+ The problem was reported to IBM, and is recorded as bug report
75+ PMR29657.
76+
77+ An immediate resolution is to alter _SS_MAXSIZE to = 1025 in
78+ /usr/include/sys/socket.h, which will resolve the immediate problem.
79+
80+ It appears that the "final" resolution will be to alter _SS_MAXSIZE to
81+ 1280, making the size nicely align with page boundaries.
82+
83+ IBM will be providing a fix in the next maintenance release (expected
84+ in October 2005) with an updated socket.h.
85+ ---
86+ From: Christopher Browne <cbbrowne@ca.afilias.info>
87+ Date: 2005-07-15
88+
89+ Some of the AIX tools may be "a little different" from what you may be
90+ accustomed to on other platforms. If you are looking for a version of
91+ ldd, useful for determining what object code depends on what
92+ libraries, the following URLs may help you...
93+
94+ http://www.faqs.org/faqs/aix-faq/part4/section-22.html
95+
96+ http://www.han.de/~jum/aix/ldd.c