[petsc-users] 3.16.4 amd blis libflame linking problem

[Barry Smith]

 Please do 

  ldd -O /opt/amd/amd-libflame-3.1.0/lib/lp64/libflame.so

 You may need to list the gfortran library directory of libgfortran.so.5 it needs to use in LDFLAGS passed to PETSc configure 

 Barry

Note: Even though you explicitly listed a static library of libflame to use our configure is goofy and loses that information and wants to link with the shared version


> On Feb 4, 2022, at 12:00 PM, Anton Popov <popov at uni-mainz.de> wrote:
> 
> 
> 
> On 04.02.22 17:39, Matthew Knepley wrote:
>> On Fri, Feb 4, 2022 at 11:35 AM Anton Popov <popov at uni-mainz.de <mailto:popov at uni-mainz.de>> wrote:
>> Hi Satish,
>> 
>> I just discovered that PETSc 3.16.4 fails to link against the latest AMD 
>> BLIS and LibFLAME libraries on a Linux box.
>> 
>> -------------------------------------------------------------------------------
>> You set a value for --with-blas-lib=<lib> and --with-lapack-lib=<lib>, 
>> but ['/opt/amd/amd-blis-3.1.0/lib/lp64/libblis.a'] and 
>> ['/opt/amd/amd-libflame-3.1.0/lib/lp64/libflame.a'] cannot be used
>> *******************************************************************************
>> 
>> My previous experience with 3.9.4 on the same system was fully 
>> successful. Looking in the configure logs (attached) reveals small 
>> difference in the linking compared to 3.9.4
>> 
>> Could you please make a guess what went wrong?
>> 
>> Down in the log I see:
>> 
>> /usr/bin/ld: warning: libgfortran.so.5, needed by /opt/amd/amd-libflame-3.1.0/lib/lp64/libflame.so, not found (try using -rpath or -rpath-link):
> Thanks Matt, I'll try.
> 
>> 
>> Did the gfortran library move or get upgraded?
> Not at all. I have configured 3.9.4 just now to make a test, and it perfectly finds all the libraries. So there must be something that 3.16.4 does differently. 
> 
> Best,
> 
> Anton
> 
>> 
>>   Thanks,
>> 
>>      Matt
>>  
>> Best regards,
>> 
>> Anton
>> 
>> 
>> -- 
>> What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.
>> -- Norbert Wiener
>> 
>> https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>

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