Hans Wennborg aa8c61cf94 -Wformat-non-iso: warn about positional arguments (pr12017) ...

This renames the -Wformat-non-standard flag to -Wformat-non-iso,
rewords the current warnings a bit (pointing out that a format string
is not supported by ISO C rather than being "non standard"),
and adds a warning about positional arguments.

llvm-svn: 152403

2012-03-09 10:10:54 +00:00

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