Thanks Dima for your help. I successfully installed libgfortan however when compiling SageMath a new error appears in the crash report : ImportError: /usr/lib/i386-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /home/nicolas/SageMath/local/lib/libntl.so.33)
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