linux-kernel - Re: [linux-stable-rc:queue/4.14 13/175] Makefile:877: *** Recursive variable 'LDFLAGS' references itself (eventually). Stop.

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Date:   Mon, 22 Aug 2022 11:47:12 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Sasha Levin <sashal@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kernel test robot <lkp@...el.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [linux-stable-rc:queue/4.14 13/175] Makefile:877: *** Recursive
 variable 'LDFLAGS' references itself (eventually). Stop.

On Mon, Aug 22, 2022 at 10:05:50AM -0700, Nick Desaulniers wrote:
> On Sat, Aug 20, 2022 at 3:51 PM kernel test robot <lkp@...el.com> wrote:
> >
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git queue/4.14
> > head:   ed8a2f4d20af62ebd64e4092d988d4ae6b54657c
> > commit: 17c47886b521ae64a733f41364def799797e45ef [13/175] Makefile: link with -z noexecstack --no-warn-rwx-segments
> > config: arc-randconfig-r043-20220821 (https://download.01.org/0day-ci/archive/20220821/202208210645.72NkUj0g-lkp@intel.com/config)
> > compiler: arc-elf-gcc (GCC) 7.5.0
> > reproduce (this is a W=1 build):
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=17c47886b521ae64a733f41364def799797e45ef
> >         git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
> >         git fetch --no-tags linux-stable-rc queue/4.14
> >         git checkout 17c47886b521ae64a733f41364def799797e45ef
> >         # save the config file
> >         mkdir build_dir && cp config build_dir/.config
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash
> >
> > If you fix the issue, kindly add following tag where applicable
> > Reported-by: kernel test robot <lkp@...el.com>
> >
> > All errors (new ones prefixed by >>):
> >
> > >> Makefile:877: *** Recursive variable 'LDFLAGS' references itself (eventually).  Stop.
> 
> Thanks for the report!
> 
> That's not something that I've seen before...
> 
> Masahiro, does ARCH=arc do something special to LDFLAGS?
> 
> This report is a randconfig against a branch of stable for arc, so
> guessing this might be more obscure than usual.

I suspect this would be fixed with commit ce99d0bf312d ("kbuild: clear
LDFLAGS in the top Makefile"), which backports cleanly to 4.14.

Cheers,
Nathan