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Using and Porting GNU Fortran

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14.4 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.

14.4.1 Not My Type  
14.4.2 Variables Assumed To Be Zero  
14.4.3 Variables Assumed To Be Saved  
14.4.4 Unwanted Variables  
14.4.5 Unused Arguments  
14.4.6 Surprising Interpretations of Code  
14.4.7 Aliasing Assumed To Work  
14.4.8 Output Assumed To Flush  
14.4.9 Large File Unit Numbers  
14.4.10 Floating-point precision  
14.4.11 Inconsistent Calling Sequences  


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