[MPICH] MPI_GET_ADDRESS

[William Gropp]

At 01:51 PM 4/21/2006, Kenneth Rempe wrote:
>Bill,
>
>Okay, what am I looking for in the configure output. Is there a why to 
>override what configure is setting?
>Also, is this a problem because in C++ you can use an unsigned int for 
>addresses up to 4GB but in fortran it is a signed integer
>which only can go up to 2GB?

The first thing to look for is the size of void *.  The line should look like

checking size of void *...8

If the size if 4, then you have 32 bit pointers.  There may then be a 
problem, as you suspect, with the signed integer in Fortran.

Bill


>Thanks
>
>Ken
>
>William Gropp wrote:
>
>>At 08:02 AM 4/21/2006, Kenneth Rempe wrote:
>>
>>>...
>>>On both the Linux and IBM the value of MPI_ADDRESS_KIND is set to a 4 
>>>byte integer.
>>
>>
>>That's the problem.  If the sizeof a pointer is 8 bytes, then 
>>MPI_ADDRESS_KIND should be an 8 byte integer. What is the output of 
>>configure for MPICH2?  Note that MPICH2 must be configured with 
>>compatible compiler options for systems that support multiple datatype 
>>sizes (such as 32 and 64bit pointers).
>>
>>Bill
>>
>>
>>>Linux   Red Hat Enterprise 3
>>>           Lahey Fortran Compiler version 6.2c
>>>           gcc version 3.2.3
>>>
>>>IBM    Aix 5.2
>>>           xlf compiler version 8.1
>>>           xlc compiler version 6.0
>>>
>>>
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>>>Kenneth R. Rempe                * email: 
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>>
>>
>>William Gropp
>>http://www.mcs.anl.gov/~gropp
>
>
>
>--
>*** NOTE: soa.com will no longer be used after February 1, 2006, please 
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>
>Kenneth R. Rempe                * email: kenneth.rempe at studsvikscandpower.com
>Studsvik Scandpower, Inc.       * 504 Shoup Avenue Suite #201     * 
>voice:  208-522-4630
>Idaho Falls, ID USA 83402-3502  * fax:    208-522-1187

William Gropp
http://www.mcs.anl.gov/~gropp