问题
I am using Bellhop ray tracing algorithm for MacOS. I have downloaded the source code for MacOS without the binaries.
I want to change my gfortran version from 9.2.0 to 8.3.0. I installed it using homebrew. I have version 9.2.0 installed. I have it installed at /usr/bin/
I cannot seem to find any commands online to change the version.
gfortran -dumpversion
This gave me my version number but I cannot seem to find a command to get a different version.
I am working on macOS (Mojave V 10.14.6). I installed it using homebrew in /usr/local/bin/gfortran. I have version 9.2.0 installed.
type gfortran
Gives me the output:
/usr/local/bin/gfortran
Update: I believe I have 8.3.0 now downloaded by erasing 9.2.0 and downloading gfortran-8. I needed to completely remove it from my system before downloading a different version.
来源：https://stackoverflow.com/questions/61021444/how-to-change-gfortran-version