Date: Sat, 30 Aug 2003 13:30:05 -0700 (PDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: freebsd-bugs@FreeBSD.org Subject: Re: misc/56206: src/sys/sys/cdefs.h uses PreProcessor variables that aren't defined, causing noisy warnings. Message-ID: <200308302030.h7UKU5xO055369@freefall.freebsd.org>
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The following reply was made to PR misc/56206; it has been noted by GNATS. From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Larry Rosenman <ler@lerctr.org> Cc: FreeBSD-gnats-submit@freebsd.org Subject: Re: misc/56206: src/sys/sys/cdefs.h uses PreProcessor variables that aren't defined, causing noisy warnings. Date: Sat, 30 Aug 2003 16:26:52 -0400 (EDT) >>> -#if __STDC_VERSION__ < 199901 >>> +#if defined(__STDC_VERSION__) && __STDC_VERSION__ < 199901 >> >> 0 < 199901 > and doesn't the #if __STDC_VERSION__ < 199901 have the same effect, except Let me try to spell this out. When __STDC_VERSION__ is not defined, the preprocessor expression `__STDC_VERSION < 199901' evaluates, by definition, to true, because 0L < 199901L (which is why I consider this GCC warning to be bogus). When __STDC_VERSION__ is not defined, the preprocessor expression `defined(__STDC_VERSION__) && __STDC_VERSION__ < 199901' evaluates to false, because __STDC_VERSION__ is not defined. -GAWollman
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