Driver doesn't resemble cc

[remexre]

@willcro needs to be able to use ableC as a drop-in replacement for $CC, and in general it'd be nice if people could do this, at least for the flags that autotools, cmake, meson, etc. require to function. I suspect this isn't much more than what's in POSIX in terms of argument parsing.

The existing argument parsing is kind of terrible; we can't even handle ableC.sh -o main main.c at the moment! It looks like this might've gotten started as edu:umn:cs:melt:ableC:drivers:compile; but this looks to be a copy of parseAndPrint with an extra comment at the top at the moment?

I think the plan forward looks something like:

• Parse the arguments specified in POSIX for c99, plus -x (and --, which isn't specified here but we ought to support)
• For any specified file with a .xc extension not specified after a -x flag, or specified after -x xc, parseAndPrint it to a temporary .c file
• Invoke ${ABLEC_BACKEND_CC:-clang} with the remainder of the arguments, with the .c files substituted for the .xc files, and -x c substituted for -x xc.

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@krame505, any chance this is something you'd have time for in the next week or so? I'm pretty swamped at the moment.

[krame505]

Seems like a reasonable plan. IIRC, this was the idea behind the compile driver but that never got finished. I don't think I would have time to work on this for a while, though.

[ericvanwyk]

I think I created compile and the main reason for doing so was that parseAndPrint is a terrible name and one that is seen when you want to show what it takes to create a composed language in ableC.