![]() I ask because I wonder if you're seeing a variant of - i.e., that the default include/library paths of your C/C++ compilers are not the same as they are for Gfortran. What is the location of your gcc and g++ - are they in /usr/bin? More specifically, are they in the same location as gfortran (e.g., /usr/local/bin)? Even more specifically: are your gcc/ g++ part of the same compiler install as your gfortran, or are they functionally two different compiler installs? In this case, everything is identical except for the Open MPI version. I then build some base libraries and then the model. So, on my laptop, I build GCC and Open MPI by hand to have better control. I help maintain an earth system model and we like to have the ability to run on a local laptop instead of our usual supercomputers for ease of development, etc. But I want to try and describe the issue. I'm still trying to see if I can figure out a reproducer for this (Hello World works just fine). Network type: Uh.internal? It's not a cluster, just a laptop running with ye olde -oversubscribe.Computer hardware: Intel MacBook Pro 2019.Operating system/version: macOS 10.15.7.Please describe the system on which you are running ![]()
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