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32-bit Matlab on 64-bit Linux

Hi,

I've some mex code(compiled by somebody else on 32-bit machines) but I currently have a 64-bit version of Matlab installed on 64-bit ubuntu.

I saw this suggestion from somebody-
http://www.mathworks.cn/matlabcentral/newsreader/view_thread/100595
"The fix (since you can't recompile the .mex files) is to run the x86 version of Matlab, which you can install alongside the native x86_64 version. Once you've done that, whenever you need to run your .mexglx files, start Matlab with 'matlab -glnx86'."

So I decided to search if this was actually possible  and I found two threads from mathworks.com which I personally believe contradict each other with their answers-
http://www.mathworks.com/support/solutions/en/data/1-O7POO/
http://www.mathworks.com/support/solutions/en/data/1-1CAT7/

So my question is whether 32-bit matlab can be installed on a 64bit machine ?

Thanks
0
9/29/2010 8:09:10 PM
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On Sep 29, 1:09=A0pm, "Gautam " <gautam.iiith...@gmail.com> wrote:
> Hi,
>
> I've some mex code(compiled by somebody else on 32-bit machines) but I cu=
rrently have a 64-bit version of Matlab installed on 64-bit ubuntu.
>
> I saw this suggestion from somebody-http://www.mathworks.cn/matlabcentral=
/newsreader/view_thread/100595
> "The fix (since you can't recompile the .mex files) is to run the x86 ver=
sion of Matlab, which you can install alongside the native x86_64 version. =
Once you've done that, whenever you need to run your .mexglx files, start M=
atlab with 'matlab -glnx86'."
>
> So I decided to search if this was actually possible =A0and I found two t=
hreads from mathworks.com which I personally believe contradict each other =
with their answers-http://www.mathworks.com/support/solutions/en/data/1-O7P=
OO/http://www.mathworks.com/support/solutions/en/data/1-1CAT7/
>
> So my question is whether 32-bit matlab can be installed on a 64bit machi=
ne ?
>
> Thanks

I have 32- and 64-bit Matlab installed on Mac OS-X 10.6x, and both
work fine.

Good luck,
-Michael
0
9/29/2010 9:20:37 PM
Michael,

I already had this from one of the links: 'Mac users do not have the same kind of exposure to these concerns and can generally ignore this topic. This is because OS X 10.5 and 10.6 do not have any user-visible distinction between 32-bit and 64-&#8220;bit-ness&#8221; in the OS'.

My question pertains to the linux versions for matlab. I would have to call in one of our sys-admins to install the 32-bit version & just wanted to check if it can actually be done(before mailing them a request).

Thank you.
0
Gautam
9/29/2010 10:02:05 PM
"Gautam " <gautam.iiith2k3@gmail.com> wrote in message 
news:i80d0s$pu6$1@fred.mathworks.com...
> Michael,
>
> I already had this from one of the links: 'Mac users do not have the same 
> kind of exposure to these concerns and can generally ignore this topic. 
> This is because OS X 10.5 and 10.6 do not have any user-visible 
> distinction between 32-bit and 64-&#8220;bit-ness&#8221; in the OS'.
>
> My question pertains to the linux versions for matlab. I would have to 
> call in one of our sys-admins to install the 32-bit version & just wanted 
> to check if it can actually be done(before mailing them a request).


Hi Gautam,

It can be done.

% matlab -nodisplay -glnx86
Information enclosed between the next two dashed lines is for internal use 
only!
-------------------------------------------------------------------
Launching MATLAB_MEM_MGR="" /blah/matlab/bin/glnx86/MATLAB -nodisplay [PID = 
11467]
-------------------------------------------------------------------
Listening for transport dt_socket at address: 4444

                            < M A T L A B (R) >
                  Copyright 1984-2010 The MathWorks, Inc.
                Version 7.11.0.584 (R2010b) 32-bit (glnx86)
                              August 16, 2010


  To get started, type one of these: helpwin, helpdesk, or demo.
  For product information, visit www.mathworks.com.

>> mexext

mexglx

>> !uname -m
x86_64

>> 


0
Trent
9/30/2010 2:16:43 PM
"Trent Jarvi" <tjarvi@mathworks.com> wrote in message <i8264b$h9d$1@fred.mathworks.com>...
> 
> 
> 
> Hi Gautam,
> 
> It can be done.
> 
> % matlab -nodisplay -glnx86
> Information enclosed between the next two dashed lines is for internal use 
> only!
> -------------------------------------------------------------------
> Launching MATLAB_MEM_MGR="" /blah/matlab/bin/glnx86/MATLAB -nodisplay [PID = 
> 11467]
> -------------------------------------------------------------------
> Listening for transport dt_socket at address: 4444
> 
>                             < M A T L A B (R) >
>                   Copyright 1984-2010 The MathWorks, Inc.
>                 Version 7.11.0.584 (R2010b) 32-bit (glnx86)
>                               August 16, 2010
> 
> 
>   To get started, type one of these: helpwin, helpdesk, or demo.
>   For product information, visit www.mathworks.com.
> 
> >> mexext
> 
> mexglx
> 
> >> !uname -m
> x86_64
> 
> >> 
> 

When I try that(matlab -glnx86), I got(content between hash marks):
##################################
---------------------------------------------------------------------------
Warning: Cannot locate Java Runtime Environment (JRE) . . .
 
         1. Either a correct JRE was not available for redistribution when
            this release was shipped, in which case you should refer to the
            Release Notes for additional information about how to get it.
 
         2. Or you have tried to use the MATLAB_JAVA environment variable
            to specify an alternate JRE, but MATLAB cannot find it.  Please
            run 'matlab -n' to determine what value you are using for
            MATLAB_JAVA and fix accordingly.
---------------------------------------------------------------------------

    matlab: No MATLAB bin directory for this machine architecture.

           ARCH = glnx86
##################################################################
I also tried ---> matlab -glnx86 -nojvm
and I get
##################################
    matlab: No MATLAB bin directory for this machine architecture.

           ARCH = glnx86
##################################

Is that because the 32-bit version was not installed ?
0
Gautam
9/30/2010 5:38:05 PM
"Gautam " <gautam.iiith2k3@gmail.com> wrote in message 
news:i82htt$h9s$1@fred.mathworks.com...
> "Trent Jarvi" <tjarvi@mathworks.com> wrote in message 
> <i8264b$h9d$1@fred.mathworks.com>...
>>
>>
>>
>> Hi Gautam,
>>
>> It can be done.
>>
>> % matlab -nodisplay -glnx86
>> Information enclosed between the next two dashed lines is for internal 
>> use only!
>> -------------------------------------------------------------------
>> Launching MATLAB_MEM_MGR="" /blah/matlab/bin/glnx86/MATLAB -nodisplay 
>> [PID = 11467]
>> -------------------------------------------------------------------
>> Listening for transport dt_socket at address: 4444
>>
>>                             < M A T L A B (R) >
>>                   Copyright 1984-2010 The MathWorks, Inc.
>>                 Version 7.11.0.584 (R2010b) 32-bit (glnx86)
>>                               August 16, 2010
>>
>>
>>   To get started, type one of these: helpwin, helpdesk, or demo.
>>   For product information, visit www.mathworks.com.
>>
>> >> mexext
>>
>> mexglx
>>
>> >> !uname -m
>> x86_64
>>
>> >>
>>
>
> When I try that(matlab -glnx86), I got(content between hash marks):
> ##################################
> ---------------------------------------------------------------------------
> Warning: Cannot locate Java Runtime Environment (JRE) . . .
>
>         1. Either a correct JRE was not available for redistribution when
>            this release was shipped, in which case you should refer to the
>            Release Notes for additional information about how to get it.
>
>         2. Or you have tried to use the MATLAB_JAVA environment variable
>            to specify an alternate JRE, but MATLAB cannot find it.  Please
>            run 'matlab -n' to determine what value you are using for
>            MATLAB_JAVA and fix accordingly.
> ---------------------------------------------------------------------------
>
>    matlab: No MATLAB bin directory for this machine architecture.
>
>           ARCH = glnx86
> ##################################################################
> I also tried ---> matlab -glnx86 -nojvm
> and I get
> ##################################
>    matlab: No MATLAB bin directory for this machine architecture.
>
>           ARCH = glnx86
> ##################################
>
> Is that because the 32-bit version was not installed ?

Hi Gautam.

Yes.  You need to have the 32 bit version installed.  There will be a 
<MATLABROOT>/bin/glnx86 directory after installing 32 bit MATLAB.  The 32 
bit JRE will also be installed under <MATLABROOT>/sys/java/jre/glnx86.  If 
you look in those directories now, I suspect you will just see the glnxa64 
versions.



0
Trent
9/30/2010 6:49:37 PM
"Trent Jarvi" <tjarvi@mathworks.com> wrote in message <i82m41$npm$1@fred.mathworks.com>...
> 
> 
> Hi Gautam.
> 
> Yes.  You need to have the 32 bit version installed.  There will be a 
> <MATLABROOT>/bin/glnx86 directory after installing 32 bit MATLAB.  The 32 
> bit JRE will also be installed under <MATLABROOT>/sys/java/jre/glnx86.  If 
> you look in those directories now, I suspect you will just see the glnxa64 
> versions.
> 
> 

Thanks for the help Trent.
I finally got the 32 version installed on my 64-bit machine. There are some issues with the gcc compiler(my guess is the paths need to be corrected accordingly) but I think I'll be able to resolve that.
0
Gautam
10/6/2010 9:01:19 PM
Hi, 
I already installed 32 bit version of matlab along side 64 bit version on a 64 bit linux system . Now, glnx86 folder is added to bin folder of matlab root directory but when I write "matlab -glnx86" in bash, I receive the following error:

matlab -glnx86
/usr/local/bin/matlab: 1223: /usr/local/bin/matlab: /usr/local/MATLAB/bin/glnx86/fvwmfix: not found
/usr/local/bin/matlab: 1: /usr/local/MATLAB/bin/util/oscheck.sh: /lib/libc.so.6: not found
/usr/local/bin/matlab: 1: exec: /usr/local/MATLAB/bin/glnx86/MATLAB: not found


both MATLAB and fvwmfix files exist within $MATLAB/bin/glnx86. I think it should be a path problem however I can't write in matlab script (read only) and after forcing the changes in a line where I am guessing that might cause the error, I encounter some other errors.
I greatly appreciate any help on that as I am in great need to finalize installation of 32 bit version of matlab for some mex files which I can't change. 
Best regards, 
Ahmadi 
0
Michael
12/6/2016 3:14:04 PM
Reply:

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On a 64-bit Scientific Linux 5.4 machine, I get the following when I try to compile the basic "Hello world" program: [root]# g++ -Wall hello.cc -o hello /tmp/ccglIDXK.s: Assembler messages: /tmp/ccglIDXK.s:10: Error: suffix or operands invalid for `push' /tmp/ccglIDXK.s:38: Error: suffix or operands invalid for `push' /tmp/ccglIDXK.s:55: Error: suffix or operands invalid for `push' /tmp/ccglIDXK.s:79: Error: suffix or operands invalid for `push' /tmp/ccglIDXK.s:81: Error: suffix or operands invalid for `push' /tmp/ccglIDXK.s:85: Error: suffix or operand...

64-bit instance on Aix 32 bit kernel / 64 bit hardware
Hi, Is it worth to use 64-bit DB2 instances on a 32-bit kernel, in terms of: - performance - configuration (go beyond the 256 Mb segment for private mem, 1.75 Gb for Bufferpools) - other ? I've seen NIS is not supported, downlevel (64 to 32 bit ?) is not supported .... The "Should I be using DB2 64-bit?" tech note seems confusing: http://www-1.ibm.com/support/docview.wss?rs=71&context=SSEPGG&q1=64-bit&uid=swg21188114&loc=en_US&cs=utf-8&lang=en It states some restrictions - You can install 64-bit DB2 UDB Version 8 on 32-bit operating systems only on AIX, HP-UX and Solaris Operating Environments. ==>You will not be able to create or run 64-bit instances. You can only create and run 32-bit instances. <== Really ? The db2setup (8.2 / Aix) asked for 32-bit or 64-bit instance creation. It seems db2iupdt -w 64 works fine, and the instance is functionning, but is it worth ? Thanks for your help, Jean-Marc Jean-Marc, I believe what the technote is trying to say is you can install the 64-bit version of DB2 (i.e. the DB2 binaries) under a 32-bit OS, but once you install the DB2 binaries, you must create DB2 instances in order to operate a DB2 database. I believe it is saying that you cannot create 64-bit instances under a 32-bit OS. If you didn't receive an error in attempting to do so, I guess you are in uncharted territory, and risk not being able to get support from IBM. I'm not ...

32 vs 64 bit Matlab
Dumb question ... How do I find out, the Matlab that I am using is 32 bit or 64 bit? Is there any addition to the command 'version' which will tell me this? Chaos Chaos wrote: > Dumb question ... > > How do I find out, the Matlab that I am using is 32 bit or > 64 bit? Is there any addition to the command 'version' which > will tell me this? > > Chaos Either of these will tell you: help computer help mexext Dan ...

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