Date: Sat, 18 Aug 2001 23:46:52 -0400 From: "Matthew Emmerton" <matt@gsicomp.on.ca> To: "Matthew Emmerton" <matt@gsicomp.on.ca>, <freebsd-ports@FreeBSD.ORG>, <freebsd-questions@FreeBSD.ORG> Subject: Re: [NOT] SOLVED: Problem with '-O -pipe' showing up in CFLAGS / CXXFLAGS Message-ID: <002b01c12861$95de5800$1200a8c0@gsicomp.on.ca> References: <001701c1285f$3c4a48f0$1200a8c0@gsicomp.on.ca>
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Aargh!
Further investigation would indicate that the problem is even deeper -- it's
in bsd.port.mk where CFLAGS and CXXFLAGS get seeded with the default values
provided by make. Does anyone know how to turn off make's defaults, aside
from manually setting CFLAGS= in the environment?
--
Matt Emmerton
----- Original Message -----
From: "Matthew Emmerton" <matt@gsicomp.on.ca>
To: <freebsd-ports@FreeBSD.ORG>; <freebsd-questions@FreeBSD.ORG>
Sent: Saturday, August 18, 2001 11:30 PM
Subject: SOLVED: Problem with '-O -pipe' showing up in CFLAGS / CXXFLAGS
> Over the past while I've seen a few people having troubles building ports
> and/or kernels. I always thought it was people setting CFLAGS and/or
> CXXFLAGS in their environment improperly or having /etc/make.conf
configured
> with '-O -pipe', as did many others.
>
> However, it finally happened to me, and I know I don't do either of these.
> After a couple of hours of investigation, the culprit was found: BSD
make
> and improperly designed Makefiles. I'm posting my findings here in hopes
> that others will find it useful.
>
> Take, for example, the Makefile for biology/xdrawchem, which contains the
> following line:
>
> MAKE_ENV= CXX="${CXX}" CXXFLAGS="${CXXFLAGS}" QTDIR="${X11BASE}"
>
> Looks innocent enough, right? After all, we want MAKE_ENV to have those
> things set right. However, this is WRONG, on two counts.
>
> First, bsd.port.mk will pick up CXX and CXXFLAGS (and CC and CFLAGS) from
> the environment so they don't need to be set explicitly here.
>
> Second, if CXX and CXXFLAGS are *not* set in the environment, make handily
> supplies its own defaults, which are inappropriate:
>
> gabby# make -X -V CXXFLAGS
> ${CXXINCLUDES} ${CFLAGS}
> gabby# make -X -V CFLAGS
> -O -pipe ${_CPUCFLAGS}
>
> This is why we end up with '-O -pipe' in CFLAGS/CXXFLAGS, and as many
people
> have indicated, throws many things for a loop. (In my case, g++ chews up
> 100% of available memory and swap while trying to optimize one of the
source
> modules in xdrawchem.)
>
> --
> Matt Emmerton
>
>
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