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When i dump symbols in libmpich.a, i got this:
$ nm /usr/MPICH-install/lib/libmpich.a | grep PMPI_File_open
00000000 T PMPI_File_open
U PMPI_File_open
Can anyone explain this, thx.
The
libmpich.acontains at least two object files. One of these defines the function (T). The other one references it (U).You can see this by running: