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[RFC] Patch implementing EXECUTE_COMMAND_LINE

Hi all,

As you can see from my few emails today, I had a bit of free time and needed something that would take me away from my day-to-day programming, so I worked on gfortran a bit :)

Here's one patch that isn't in final state yet, but I probably won't have time to submit it formally before a few weeks. It implements EXECUTE_COMMAND_LINE, a new F2008 intrinsic that should replace the old SYSTEM extension in user code. My patch comes with a complete implementation, but no testcase and no doc. I tested it manually and it seems to work OK. I'd be glad to have people build it on different systems, though, at it uses some UNIX-specific stuff that I'm never too sure to get right on the first time.

So, if someone has time (although I know it's unlikely) and want to fly with it, please go ahead. Otherwise, I'll submit it formally when I get time. In the meantime, any testing you can do (and report here) will be of help.


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