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When compiling code that uses OpenMPI with mpifort -qopenmp -O3 -xhost -ipo -qoverride-limits -nowarn, I receive a bunch of warnings such as
ipo: warning #11021: unresolved opal_thread_get_self
Referenced in /usr/local/openmpi/1.8.8/intel160/x86_64/lib64/libmpi.so
It appears that the -nowarn flag does not prevent these warnings from appearing; is there any way to prevent them?
I am using Intel version 16.0.2 20160204.
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Was your OpenMPI built with ifort 16.0, with its install paths set when building your application? Failure to link is fatal, not a warning. The subject is more likely to be dealt with on the OpenMPI mail list, after you consult the person who installed your OpenMPI.
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It is a known issue that IPO linkage issue warnings on those symbols inside indirectly referenced libraries like "libopen-pal.so". I have linked your post to the existing defect report DPD200362415.
A possible workaround is to explicitly add libraries containing those symbols to the command line, for example, "-lopen-pal".
Thanks,
Xiaoping Duan
Intel Customer Support
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Thank you Tim and Xiaoping for the comments. My version of OpenMPI was built with ifort 16.0 and the install paths were set when building the application.
I might do as Xiaoping suggests or I might just let the warnings print out.
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