// Some compilers complain about "statement with no effect" with (a).
// This eliminates the warnings, and no code is generated for the null
// conditional statement. @note that may only be true if -O is enabled,
// such as with GreenHills (ghs) 1.8.8.
# define ACE_UNUSED_ARG(a) do {/* null */} while (&a == 0)
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