Date: Thu, 12 Feb 2004 21:56:08 -0600 (CST) From: "Paul Seniura" <pdseniura@techie.com> To: "Kris Kennaway" <kris@obsecurity.org> Cc: freebsd-questions@freebsd.org Subject: Re: need help on CFLAGS in /etc/make.conf please Message-ID: <20040213035608.3AA11A38EA@scifi.homeip.net> In-Reply-To: <20040213011324.GA55948@xor.obsecurity.org> References: <20040213001703.616C75C3B@techpc04.okladot.state.ok.us><20040213011324.GA55948@xor.obsecurity.org>
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Hi Kris, > On Thu, Feb 12, 2004 at 06:17:03PM -0600, Paul Seniura wrote: > > > > Hi y'all, > > > > I'm trying to find a way to do a CFLAGS+='-O' if and only if such a > > parm was not already provided before 'make' actually runs. > > > > I had this coded with the single = sign, i.e. without ?= or +=, but > > the process still acts as if += was coded anyway, thus tacking on > > my -O *after* the port's own CFLAGS. > > > > GCC33 docs say the _last_ -O# is the one that will be used. > > > > I've seen other discussion on using -O2 but the point seems to be the > > ports that set -O2 explicitly are likely to work correctly. On Thu 12 Feb 2004 17:13:25 -0800, Kris Kennaway replied: > That's not a good assumption; many ports simply add -O2 (or -O3, or > -O999) because the authors "want their code to run fast". The set of > ports for which the authors have run full regression suites for all > supported versions of gcc and all supported OS and architecture > combinations is probably the null set. Thank you for responding, but I'm *really* not wanting this to become another discussion on "how high my Oh-levels should be". ;) My question for this discussion is specifically how to prevent overriding a port's own setting for that parm, and to provide a default setting -O[1] when the port does not set it at all? (I'll save my l-o-n-g-e-r reply for later... believe me I have reasons ;) > Kris -- thx, Paul Seniura (in OkC)
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