List Archive: gentoo-dev
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On Sat, Sep 30, 2006 at 04:37:05PM -0600, Ryan Hill wrote:
> I thought he wanted flags that broke upgrading between GCC 3.4 and 4.1.
> tree-loop-linear wasn't in 3.4. If you want flags that just break
> stuff with 4.1 you can include -ftree-vectorize.
> > The objective here was mainly to point out some things that users are
> > doing that are causing breakages, leading to bugs that are ultimately
> > marked INVALID after much tracing.
> Like using CFLAGS not on the Safe CFLAGS page? ;)
One needs to use some common sense as a developer in evaluating user
CFLAGS - because there are plenty of flags that are safe, but aren't
listed on that page.
Several years ago, I wrote a package that was the forerunner of the
'Safe CFLAGS' page - genflags. It was close to unmaintable at the time
however, so it's suffered a lot of bit-rot. With the advent of
libcpuinfo, and x86info being written, it stands a much better chance of
giving useful output, but that still does not supersede the common sense
Robin Hugh Johnson
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