On Cori, when using the '-ipo' (interprocedural optimization) flag for Intel compilers, Darshan causes compilation warnings. I have verified this using a simple test Fortran program and the ifort compiler (output shown below). The applications appear to run without errors and Darshan logs are generated successfully.

Sample output warnings:

ipo: warning #11021: unresolved __real_H5Fcreate

     Referenced in libdarshan.a(darshan-hdf5.o)

ipo: warning #11021: unresolved __real_H5Fopen

     Referenced in libdarshan.a(darshan-hdf5.o) 

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