182 lines
6.7 KiB
Plaintext
182 lines
6.7 KiB
Plaintext
From: Zeugswetter Andreas <ZeugswetterA@spardat.at>
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$Date: 2005/12/08 21:36:50 $
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On AIX 4.3.2 PostgreSQL compiled with the native IBM compiler xlc
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(vac.C 5.0.1) passes all regression tests. Other versions of OS and
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compiler should also work. If you don't have a powerpc or use gcc you
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might see rounding differences in the geometry regression test.
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Use the following configure flags in addition to your own
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if you have readline or libz there:
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--with-includes=/usr/local/include --with-libraries=/usr/local/lib
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There will probably be warnings about 0.0/0.0 division and duplicate
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symbols which you can safely ignore.
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Compiling PostgreSQL with gcc (2.95.3) on AIX also works.
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You need libm.a that is in the fileset bos.adt.libm. (Try the
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following command.)
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$ lslpp -l bos.adt.libm
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---
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From: Christopher Browne <cbbrowne@ca.afilias.info>
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Date: 2005-07-15
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On AIX 5.3, there have been some problems getting PostgreSQL to
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compile and run using GCC.
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1. You will want to use a version of GCC subsequent to 3.3.2,
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particularly if you use a prepackaged version. We had good
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success with 4.0.1.
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Problems with earlier versions seem to have more to do with the
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way IBM packaged GCC than with actual issues with GCC, so that if
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you compile GCC yourself, you might well have success with an
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earlier version of GCC.
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2. AIX 5.3 has a problem where sockadr_storage is not defined to be
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large enough. In version 5.3, IBM increased the size of
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sockaddr_un, the address structure for UNIX Domain Sockets, but
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did not correspondingly increase the size of sockadr_storage.
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The result of this is that attempts to use UDS with PostgreSQL
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lead to libpq overflowing the data structure. TCP/IP connections
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work OK, but not UDS, which prevents the regression tests from
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working.
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The nonconformance may be readily demonstrated by compiling and
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running the following C program which calculates and compares the
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sizes of the various structures:
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test_size.c
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------------
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---------- snip here - test_size.c ----------------------------
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#include <stdio.h>
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#include <sys/un.h>
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#include <sys/socket.h>
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int main (int argc, char *argv[]) {
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struct sockaddr_storage a;
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struct sockaddr_un b;
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printf("Size of sockadr_storage: %d\n", sizeof(a));
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printf ("Size of sockaddr_un:%d\n", sizeof(b));
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if (sizeof(a) >= sizeof(b))
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printf ("Conformant to RFC 3493\n");
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else
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printf ("Non-conformant to RFC 3493\n");
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}
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---------- snip here - test_size.c ----------------------------
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The problem was reported to IBM, and is recorded as bug report
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PMR29657.
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An immediate resolution is to alter _SS_MAXSIZE to = 1025 in
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/usr/include/sys/socket.h, which will resolve the immediate problem.
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It appears that the "final" resolution will be to alter _SS_MAXSIZE to
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1280, making the size nicely align with page boundaries.
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IBM will be providing a fix in the next maintenance release (expected
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in October 2005) with an updated socket.h.
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---
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PMR29657 was resolved in APAR IY74147: INCOMPATIBILITY BETWEEN
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SOCKADDR_UN AND SOCKADDR_STORAGE STRUCT
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APAR information
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APAR number IY74147
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Reported component name AIX 5.3
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Reported component ID 5765G0300
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Reported release 530
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Status CLOSED PER
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PE NoPE
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HIPER NoHIPER
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Submitted date 2005-07-18
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Closed date 2005-07-18
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Last modified date 2005-09-06
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If you upgrade to maintenance level 5300-03, that will include this
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fix. Use the command "oslevel -r" to determine what maintenance level
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you are at.
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---
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From: Christopher Browne <cbbrowne@ca.afilias.info>
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Date: 2005-07-15
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Some of the AIX tools may be "a little different" from what you may be
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accustomed to on other platforms. If you are looking for a version of
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ldd, useful for determining what object code depends on what
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libraries, the following URLs may help you...
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http://www.faqs.org/faqs/aix-faq/part4/section-22.html
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http://www.han.de/~jum/aix/ldd.c
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---
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AIX, readline, and postgres 8.1.x:
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----------------------------------
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If make check doesn't work on AIX with initdb going into an infinite
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loop or failing with child processes terminated with signal 11, the
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problem could be the installed copy of readline. Previously a patch to
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dynahash.c was suggested to get around this, don't use it, better ways
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to get postgres working exist.
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See <http://archives.postgresql.org/pgsql-patches/2005-11/msg00139.php>
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for details about the problem.
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Working around the problem:
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---------------------------
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1) Use the new 8.2devel backend Makefile:
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After the matter of readline's export list and the problems that were
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occurring on AIX because of it being linked to the backend, a filter
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to exclude unneeded libraries from being linked against the backend was
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added. Get revision 1.112 of src/backend/Makefile from CVS and replace
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the copy that came with postgres with it. Build normally.
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2) Use libedit:
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There are a few libedit ports available online. Build and install the
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desired port. If libreadline.a can be found in /lib, /usr/lib, or in
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any location passed to postgres' configure via "--with-libraries=",
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readline will be detected and used by postgres. IBM's rpm of readline
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creates a symlink to /opt/freeware/lib/libreadline.a in /lib, so merely
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excluding /opt/freeware/lib from the passed library path does not stop
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readline from being used.
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If the linker cannot avoid finding libreadline.a, use revision 1.433
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configure.in and 1.19 config/programs.m4 from CVS, change 8.2devel to
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the appropriate 8.1.x in configure.in and run autoconf. Add the
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configure flag "--with-libedit-preferred".
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If the version of libedit used calls its "history.h" something other
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than history.h, place a symlink called history.h to it somewhere that
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the C preprocessor will check.
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3) Configure with "--without-readline":
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postgres can be configured with the option "--without-readline". When
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this is enabled, postgres will not link against libreadline or libedit.
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psql will not have history, tab completion, or any of the other niceties
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that readline and libedit bring, but external readline wrappers exist
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that add that functionality.
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4) Use readline 5.0:
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Readline 5.0 does not induce the problems, however it does export
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memcpy and strncpy when built using the easy method of "-bexpall". Like
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4.3, it is possible to do a build that does not export these symbols,
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but it does take considerable manual effort and the creation of export
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files.
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References
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----------
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"AIX 5L Porting Guide"
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IBM Redbook
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http://www.redbooks.ibm.com/redbooks/pdfs/sg246034.pdf
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http://www.redbooks.ibm.com/abstracts/sg246034.html?Open
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"Developing and Porting C and C++ Applications on AIX"
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IBM Redbook
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http://www.redbooks.ibm.com/redbooks/pdfs/sg245674.pdf
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http://www.redbooks.ibm.com/abstracts/sg245674.html?Open
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