Date: Sat, 7 Apr 2012 18:19:53 +0100 From: David Chisnall <theraven@FreeBSD.ORG> To: David Schultz <das@FreeBSD.ORG> Cc: Konstantin Belousov <kostikbel@gmail.com>, svn-src-head@FreeBSD.ORG, svn-src-all@FreeBSD.ORG, src-committers@FreeBSD.ORG, Kirk McKusick <mckusick@FreeBSD.ORG> Subject: Re: svn commit: r232351 - in head/sys: kern sys ufs/ffs ufs/ufs Message-ID: <44678A07-0CDB-40E5-A149-DFE55FB96611@FreeBSD.ORG> In-Reply-To: <20120407171022.GB2737@zim.MIT.EDU> References: <201203011845.q21IjQqt091350@svn.freebsd.org> <20120302125334.GH75778@deviant.kiev.zoral.com.ua> <0F23DDD1-1CAC-4E72-A3CB-56B81F0C0790@FreeBSD.org> <20120407171022.GB2737@zim.MIT.EDU>
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On 7 Apr 2012, at 18:10, David Schultz wrote: > The biggest hinderance to using extern inline is that gcc and C99 > disagree about what it means, unless you use a reasonably recent > compiler in C99 mode. I first tried to use extern inline in the > tree several years after I backported gcc's C99 inline support, > and it still turned out to be a headache. You can detect which inlining mode is going to happen by checking the = value of __STDC_VERSION__ and the value of __GNUC_GNU_INLINE__. If = __STDC_VERSION__ is >=3D 199901L and __GNUC_GNU_INLINE__ is not defined = then you're in C99 inlining mode, otherwise you're in GNU inlining mode. = =20 On some projects with headers that need to work in both modes, we've = written some INLINE_EXTERN macros that do the right thing in whichever = mode we find ourselves compiling. It might be worth putting these in = cdefs.h if they're generally useful. David=
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