proposed Opengroup action for c99 command (XCU ERN 76)

[Geoffrey Keating]

rridge@csclub.uwaterloo.ca (Ross Ridge) writes:

> >The POSIXy way to do that would be to refer to the LC_CHARSET
> >environment variable, but then consider
> >
> >LC_CHARSET=UTF-16 c99 foo.c
> >
> >where 'foo.c' is in UTF-16 and contains '#include <stdio.h>',
> 
> Not really a problem for a number of reasons.  First, it's LC_CTYPE
> you're thinking of.  Second, the narrow character set can only be 16-bits
> wide if "char" is 16-bits.  Thirdly, if the character set that LC_CTYPE
> selects isn't superset of the POSIX portable character set then result
> is undefined.  So if <stdio.h> happens to writen using characters only
> from C basic character set (which is a subset of the portable character
> set), there isn't a problem.

My concern would be that it would be written using only characters
"from the basic C character set", but the actual byte values that
represent those characters might differ.  For instance, if POSIX
allows LC_CTYPE=EBCDIC (or equivalent).