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Use getopt_long() to standardize command line processing #41
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Also prevents segfaults when missing parameters are passed. Switching to getops forced changng nonstandard short comamnds "-ld" and "-lm" to "-l" and "-m", respectively.
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I noticed that a missing parameter can cause a segfault because the original code did no sanity checking on argv[]. A better solution is to use a standard cli parsing facility like getopt_long().
One downside is switching to getopt forced changing the nonstandard short commands
"-ld" and "-lm" to "-l" and "-m", respectively.