Re: Compile/Link Error for Postgres 8.1.0 on Solaris 8 - Mailing list pgsql-novice

Why don't you just try out the version that is compiled for Solaris at
www.blastwave.org ? Secondly a slightly OT point, Studio 11 is available
for download from Sun's site for free try that.

Aly


On Fri, 9 Dec 2005, Bhide, Rajan wrote:

>man CC:
>    -mt       Compile and link for multithreaded code.
>               This option:
>               o Passes -D_REENTRANT to the preprocessor
>               o Passes -lthread in the correct order to ld
>               o Ensures that, for standard mode (the default
>                 mode), libthread is linked before libCrun
>               o Ensures that, for compability mode (-compat),
>                 libthread is linked before libC
>               The -mt option is required if the application or
>               libraries are multithreaded.
>               Warnings:
>               To ensure proper library linking order, you must
>               use this option, rather than -lthread, to link
>               with libthread.
>               If you are using POSIX threads, you must link with
>               the options -mt -lpthread.  The -mt option is
>               necessary because libC (compatibility mode) and
>               libCrun (standard mode) need libthread for a mul-
>               tithreaded application.
>               If you compile and link in separate steps and you
>               compile with -mt, you might get unexpected
>               results. If you compile one translation unit with
>               -mt, compile all units of the program with -mt.
>               If you are mixing parallel Fortran objects with
>               C++ objects, the link line must specify the -mt
>               flag.
>
>For portability reasons, I am using Posix threads.
>As pointed out by Alan, -D_REENTRANT is redundant which I will remove.
>
>>>What version of the Sun compilers are you using here?
>cc: Sun WorkShop 6 update 2 C 5.3 2001/05/15
>
>
>I got cc: Sun C 5.7 2005/01/07 (Studio 10) installed on other box,so
>would try this one with the options suggested.
>The updated configure params are as under.
>
>
>./configure --without-readline --enable-thread-safety
>CFLAGS='-xinline=%auto,MemoryContextSwitchTo -xcrossfile -mt'
>LDFLAGS='-lpthread' CC=/export/home/uxapps/workshop/SUNWspro/bin/cc
>
>The main reason to use -mt options was to build thread safe PQ Client
>Library.
>We use Postgres mostly on Sparc v240 system with Solaris 8 and above.
>The app demands very high performance and is very extensive db write
>kind of.
>As the latest Postgres version mentions about many performance
>enhancement, we wanted to try before migrating to it.
>I would be highly obliged if you guys have some performance figures or
>benchmark results for Solaris environment. Could you please send
>pointers to it.
>If you have some input specific to compilation that too would be of much
>help.
>
>Thanks,
>Rajan Bhide
>
>-----Original Message-----
>From: Alan Stange [mailto:stange@rentec.com]
>Sent: Friday, December 09, 2005 1:06 AM
>To: Tom Lane
>Cc: Bhide, Rajan; pgsql-novice@postgresql.org
>Subject: Re: [NOVICE] Compile/Link Error for Postgres 8.1.0 on Solaris 8
>
>
>Tom Lane wrote:
>> Alan Stange <stange@rentec.com> writes:
>>
>>> Bhide, Rajan wrote:
>>>
>>>> ./configure --without-readline --enable-thread-safety CFLAGS=-xO4
>>>> -D_REENTRANT -xipo -mt -lpthread
>>>> CC=/export/home/uxapps/workshop/SUNWspro/bin/cc
>>>>
>>
>>
>>> Given that you've enabled -xipo, and the error is related to ipo, I'd
>>> suggest dropping that option for now.
>>>
>>
>> Putting -lpthread into CFLAGS seems pretty foolish as well.  If you
>> needed to specify that explicitly (which you do not) it would belong
>> in LDFLAGS --- putting it in CFLAGS is pretty certain to screw up link
>
>> order and so on.  And what is -mt?
>>
>>             regards, tom lane
>>
>     -mt  Passes D_REENTRANT to preprocessor. Appends -lthread
>          after all other user-specified libraries on the command
>          line.  If you are doing your own multithread coding,
>          you must use this option in the compile and link steps.
>          To obtain faster execution, this option requires a mul-
>          tiprocessor system. On a single-processor system, the
>          resulting executable usually runs more slowly with this
>          option.
>
>
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--
Aly S.P Dharshi
aly.dharshi@telus.net

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