How to Fix 'Undefined Symbol: G77_date_and_time_0' Error in Fortran Subroutine?

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SUMMARY

The forum discussion addresses the "undefined symbol: G77_date_and_time_0" error encountered when executing a Python program that utilizes a Fortran subroutine. The issue arises from a potential incompatibility between the g95 compiler and g77 function calls. Users are advised to ensure compatibility between the Fortran compiler versions being used, as this error typically indicates a mismatch in the expected function definitions across different compilers.

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  • Understanding of Fortran subroutines
  • Familiarity with Python integration with Fortran
  • Knowledge of g95 and g77 compilers
  • Basic troubleshooting of compiler errors
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  • Research compatibility issues between g95 and g77 compilers
  • Learn how to properly link Fortran subroutines in Python using f2py
  • Explore alternative Fortran compilers that may resolve the issue
  • Investigate the use of compiler flags to manage symbol visibility
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Developers working with Python and Fortran integration, particularly those troubleshooting compiler-related errors in scientific computing applications.

Dreyliciouss
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27 Jul 10 2:35
Hello,
I have an error when I try to execute my python program which uses a fortran subroutine (which call date_and_time function) :
"undefined symbol: G77_date_and_time_0"

Do you know how can I fix this issue?
Thank you very much!
 
Technology news on Phys.org
It looks like a compiler error. Are you trying to force a g95 compile that uses g77 calls? It seems like it may be a compiler-specific function that is causing the problem.
 

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