linux-kernel - Re: [PATCH v3 1/3] kbuild: Add _

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Date:   Mon, 19 Jun 2017 09:42:17 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     kbuild-all@...org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        "H . J . Lu" <hjl.tools@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Michal Marek <mmarek@...e.com>, X86 ML <x86@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michael Davidson <md@...gle.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Stephen Hines <srhines@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>,
        Bernhard Rosenkränzer 
        <Bernhard.Rosenkranzer@...aro.org>,
        Peter Foley <pefoley2@...oley.com>,
        Behan Webster <behanw@...verseincode.com>,
        Douglas Anderson <dianders@...omium.org>,
        kbuild test robot <lkp@...el.com>
Subject: Re: [PATCH v3 1/3] kbuild: Add __cc-option macro

Hi Masahiro,

El Mon, Jun 19, 2017 at 11:00:42AM +0900 Masahiro Yamada ha dit:

> Sorry, the code I suggested introduced a slight behavior change.
> 
> With this patch, cc-option adds a space before the returned option.
> 
> 
> Please see line 46 of arch/sh/Makefile.
> 
> ifeq ($(cflags-y),)
> 
> 
> Now cflags-y contains a space, so
> this conditional is now evaluated as false,
> which was actually true without the patch.
> This is the cause of the build error.

Thanks for looking into this, I also didn't realize that the extra
space could be an issue.

> Could you remove whitespaces before $(1) and $(2) in cc-option?
> 
> Also, please fix hostcc-option as well.

Sure, I'll send out a new version soon.

> 2017-06-18 15:58 GMT+09:00 kbuild test robot <lkp@...el.com>:
> > Hi Matthias,
> >
> > [auto build test ERROR on tip/auto-latest]
> > [also build test ERROR on v4.12-rc5 next-20170616]
> > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
> >
> > url:    https://github.com/0day-ci/linux/commits/Matthias-Kaehlcke/kbuild-Add-__cc-option-macro/20170616-082252
> > config: sh-sh7710voipgw_defconfig (attached as .config)
> > compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
> > reproduce:
> >         wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # save the attached .config to linux build tree
> >         make.cross ARCH=sh
> >
> > All errors (new ones prefixed by >>):
> >
> >    {standard input}: Assembler messages:
> >>> {standard input}:672: Error: invalid operands for opcode
> >    {standard input}:673: Error: opcode not valid for this cpu variant
> >    {standard input}:674: Error: opcode not valid for this cpu variant
> >    {standard input}:675: Error: invalid operands for opcode
> >    {standard input}:1900: Error: invalid operands for opcode
> >    {standard input}:1901: Error: opcode not valid for this cpu variant
> >    {standard input}:1902: Error: opcode not valid for this cpu variant
> >    {standard input}:1903: Error: invalid operands for opcode
> >    {standard input}:2067: Error: invalid operands for opcode
> >    {standard input}:2068: Error: opcode not valid for this cpu variant
> >    {standard input}:2069: Error: opcode not valid for this cpu variant
> >    {standard input}:2070: Error: invalid operands for opcode
> >    {standard input}:2570: Error: invalid operands for opcode
> >    {standard input}:2571: Error: opcode not valid for this cpu variant
> >    {standard input}:2572: Error: opcode not valid for this cpu variant
> >    {standard input}:2573: Error: invalid operands for opcode
> >
> > ---
> > 0-DAY kernel test infrastructure                Open Source Technology Center
> > https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
> 
> 
>