linux-ext4 - Re: debugfs: dump a sparse file as a new sparse file

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Date:	1 Jan 2013 16:25:04 -0500
From:	"George Spelvin" <linux@...izon.com>
To:	linux@...izon.com, tytso@....edu
Cc:	gnehzuil.liu@...il.com, linux-ext4@...r.kernel.org
Subject: Re: debugfs: dump a sparse file as a new sparse file

> There are people who compile e2fsprogs under Windows (e.g. for FUSE
> for Windows support), and MSVC does not support VLA's or C99 in
> general In general I tend to be very conservative about what compiler
> features are used in e2fsprogs, and I do care about portability beyond
> just Linux systems.

Ah, thank you!  I fully agree that's an important C compiler to
target; I had just erroneously assumed that commercial C compilers
would try to be "check-box feature complete" on such matters.

But apparently Microsoft don't support C99 and have no intention to:
http://herbsutter.com/2012/05/03/reader-qa-what-about-vc-and-c99/
http://visualstudio.uservoice.com/forums/121579-visual-studio/suggestions/2089423-c99-support
http://www.infoq.com/news/2012/05/vs_c99_support/

That's a good enough reason; my only remaining objection is calling it
"a non-standard/non-portable GCC extension".
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