Re: Build regressions/improvements in v4.3-rc3

From	Russell King - ARM Linux <linux@arm.linux.org.uk>
Newsgroups	linux.kernel
Subject	Re: Build regressions/improvements in v4.3-rc3
Date	2015-09-28 16:00 +0200
Message-ID	<qdH8f-1eq-21@gated-at.bofh.it> (permalink)
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On Mon, Sep 28, 2015 at 03:50:16PM +0200, Geert Uytterhoeven wrote:
> Hi Russell,
> 
> On Mon, Sep 28, 2015 at 11:48 AM, Russell King - ARM Linux
> <linux@arm.linux.org.uk> wrote:
> > Also, a great many of the failures are due to the build toolchain not
> > supporting -fstack-protector-strong.  I think it's absolutely right
> > for the build to error out if you enable a kernel feature which requires
> > toolchain support, but the toolchain does not support that feature.
> >
> > What this means is that the build results from kissb are less than
> > useful - without spending ages looking at every single build, it's
> > hard to find the real failures we care about.
> >
> > I'd suggest that either the randconfig is seeded to ensure that
> > CONFIG_CC_STACKPROTECTOR_STRONG is always disabled in ARM randconfigs,
> > or that the ARM toolchain is updated to support this feature.
> 
> Or that it's impossible to enable this feature if your toolchain doesn't
> support it?

I think that would require kconfig to call out to the compiler to run
a test build.  This kind of thing has been talked about in the past
but the feature never seems to appear - probably because it would end
up increasing the kconfig startup time in every case.

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Thread

Re: Build regressions/improvements in v4.3-rc3 Geert Uytterhoeven <geert@linux-m68k.org> - 2015-09-28 09:00 +0200
  Re: Build regressions/improvements in v4.3-rc3 Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-28 11:40 +0200
    Re: Build regressions/improvements in v4.3-rc3 Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-28 11:50 +0200
      Re: Build regressions/improvements in v4.3-rc3 Geert Uytterhoeven <geert@linux-m68k.org> - 2015-09-28 16:00 +0200
        Re: Build regressions/improvements in v4.3-rc3 Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-28 16:00 +0200
          Re: Build regressions/improvements in v4.3-rc3 Geert Uytterhoeven <geert@linux-m68k.org> - 2015-09-28 16:10 +0200

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