15.4 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.

15.4.1 Not My Type
15.4.2 Variables Assumed To Be Zero
15.4.3 Variables Assumed To Be Saved
15.4.4 Unwanted Variables
15.4.5 Unused Arguments
15.4.6 Surprising Interpretations of Code
15.4.7 Aliasing Assumed To Work
15.4.8 Output Assumed To Flush
15.4.9 Large File Unit Numbers
15.4.10 Floating-point precision
15.4.11 Inconsistent Calling Sequences