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I am installing GRASS on Linux. I have gotten as far as running Make in these instructions: https://grass.osgeo.org/grass78/binary/linux/snapshot/INSTALL

I get this for multiple libraries:

error while loading shared libraries: libproj.so.12: cannot open shared object file: No such file or directory

I have found this file in the /usr/lib64 folder, so have added that folder to my LD_LIBRARY_PATH. But it still fails to find the files. I am new to Linux. Is there something else I should be doing? I am using Amazon linux if that makes any difference

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    Errors like these often indicate that you are missing a development library. In this case libproj-devel. Since Amazon uses an rpm based package manager, you might try yum install libproj-devel or similar.
    – Micha
    Commented Jan 5, 2022 at 8:29

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I found this file in /usr/local/lib/ and added that to the LD_LIBRARY_PATH env. variable. It was not in the folder /usr/lib64/ along with other .so files.

This allowed me to install GRASS with no errors

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