buildkernel fails with a 'invalid conversion specifier' compiler error

[Alex T.]

Thank you. The workaround helped, but kind of curious now what caused this
failures to start show up. Will try going through commits to see if I can
spot anything.

On 18 September 2016 at 12:07, Dimitry Andric <dim at freebsd.org> wrote:

> On 18 Sep 2016, at 20:37, Alex T. <dioxinu at gmail.com> wrote:
> >
> > I'm on stable/10 branch and have been using it to rebuild world
> > and kernel. This is the revision I'm currently trying to build but
> > started seeing the following issue way before it.
> >
> > URL: svn://svn.freebsd.org/base/stable/10
> > Revision: 305760
> >
> > The world builds fine, but building the kernel fails with this error:
> >
> > /usr/src/sys/cam/cam_xpt.c:1060:27: error:
> >      invalid conversion specifier 'b'
> >      [-Werror,-Wformat-invalid-specifier]
> >  ...printf("%s%d: quirks=0x%b\n", perip...
> >                            ~^
> > /usr/src/sys/cam/cam_xpt.c:1061:36: error:
> >      data argument not used by format
> >      string [-Werror,-Wformat-extra-args]
> >  ...periph->unit_number, quirks, bit_st...
> >
> > This is how my /etc/make.conf looks like:
> > WITH_PKGNG=yes
> > SSP_CFLAGS=-fstack-protector-all
> > WITH_SSP_PORTS=yes
> > WITHOUT="DOCS"
> >
> > and I don't have /etc/src.conf. Has anyone seen this issue?
> >
> > Any idea what might me misconfigured missing here?
>
> It's hard to say what is different on your system, but it looks like the
> -fformat-extensions flag is somehow not being used for building your
> kernel.  If you can't figure out what causes this, you can try to work
> around it by setting WITHOUT_FORMAT_EXTENSIONS, or setting WERROR to
> empty.
>
> -Dimitry
>
>