Working Programs

Getting Fortran programs to work in the first place can be quite a challenge--even when the programs already work on other systems, or when using other compilers.

g77 offers some facilities that might be useful for tracking down bugs in such programs.

• Not My Type
• Variables Assumed To Be Zero
• Variables Assumed To Be Saved
• Unwanted Variables
• Unused Arguments
• Surprising Interpretations of Code
• Aliasing Assumed To Work
• Output Assumed To Flush
• Large File Unit Numbers

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