La Vita è Bella
Friday, July 11, 2008
Don't try to fool compilers
There's a macro in ACE to eliminate a compiler warning:
379 // Some compilers complain about "statement with no effect" with (a).
380 // This eliminates the warnings, and no code is generated for the null
381 // conditional statement. @note that may only be true if -O is enabled,
382 // such as with GreenHills (ghs) 1.8.8.
383 # define ACE_UNUSED_ARG(a) do {/* null */} while (&a == 0)
But when I use this macro, gcc 4.3 will complain:
warning: the address of ‘a’ will never be NULL
tags: dev, compiler, gcc, warning, ace
12:25:52 by fishy - dev - Permanent Link
Revision: 1.2/1.2, last modified on 2008-07-11 @ 12:28.
Karma: 9 (80.00% out of 15 were positive) [+/-]
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