Date: Thu, 13 Jun 2002 17:04:19 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Alex Zepeda <zipzippy@sonic.net> Cc: Bruce Evans <bde@zeta.org.au>, current@freebsd.org Subject: Re: Broken world in rtld-elf... Message-ID: <3D093302.42B0E0F6@mindspring.com> References: <20020612231541.GA1543@blarf.homeip.net> <20020613121920.T1422-100000@gamplex.bde.org> <20020613191637.GA57841@blarf.homeip.net>
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Alex Zepeda wrote:
> On Thu, Jun 13, 2002 at 12:26:05PM +1000, Bruce Evans wrote:
> > rtld still uses asms with the old, broken/fragile "0" constraint. This
> > constraint is especially broken/fragile if things are pessimized by
> > compiling without optimizations.
>
> D'oh!
>
> Is there any chance of sticking a warning in the makefile if -O0 (or
> whatever else would cause it to not compile) is present?
GCCVERS=`gcc -v 2>&1 | grep version | cut -d " " -f 3`
.if ${GCCVERS} = "3.1"
.BEGIN:
echo "Optimization with GCC 3.1 is often broken!" >&2
.endif
Oh... you wanted to grep "-O" out of the CFLAGS and CXXFLAGS?
How to do that should be obvious from the above...
-- Terry
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