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Here is my current program. At the moment, all it does is take a command line argument (a path) and attempt to open the specified file. I build it with `gfortran src/puzzle.f90 -std=f2023 -o program`

https://github.com/mcclure/aoc2024/blob/822e460f81b944c21ca675303b868c45b22a4c2b/04-01-wordsearch/src/puzzle.f90

I'm having two problems, one serious, one unserious.

The unserious problem: I want to abort if the # of arguments is bad. If I do "error stop", it prints a backtrace, which I didn't ask for. If I do "call abort", gfortran fails to link ("undefined reference to 'abort_').