bug#30718: coreutils-8.29 compilation failure using xlC on AIX

[Paul Eggert]

On 03/05/2018 12:48 PM, John Wiersba wrote:
> I'm not sure of the rationale for using enum here, but apparently the AIX xlC 
> compiler
> doesn't like it.

That's a bug in the IBM xlC compiler; could you please report it to IBM?

The code uses an enum because it wants to name the expression. The C 
standard requires that static array sizes have constant bounds, and 
enums are constants, so this technique conforms to C89 (as well as to 
C99 and C11). If the IBM compiler is complaining about it then it's not 
conforming to the standard. Most likely the compiler is incorrectly 
hoisting the static decl to be as if it were outside the function body, 
which is an incorrect transformation.

Anyway, I installed the attached patch into coreutils, to work around 
the compiler bug. Thanks for reporting the problem.

0001-stat-work-around-IBM-xlC-bug.patch
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