Re: Challenges around the usage of different "HOSTCFLAGS" for kernel build configuration and module generation

From	Segher Boessenkool <segher@kernel.crashing.org>
Newsgroups	linux.kernel
Subject	Re: Challenges around the usage of different "HOSTCFLAGS" for kernel build configuration and module generation
Date	2016-10-20 00:10 +0200
Message-ID	<su7dE-7iT-5@gated-at.bofh.it> (permalink)
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On Wed, Oct 19, 2016 at 12:51:44PM -0700, Jim Davis wrote:
> On Wed, Oct 19, 2016 at 12:25 AM, SF Markus Elfring
> <elfring@users.sourceforge.net> wrote:
> >
> > Are you interested that a software generation parameter like "-S"
> > (for output of assembler source files) could be directly supported
> > for a special build variant?
> 
> No, if you want to see the assembly code then something like
> 
> make defconfig; make EXTRA_CFLAGS="-g" drivers/md/; objdump -S
> drivers/md/whatever.o
> 
> seems easy enough.  You could write a little shell wrapper to save
> some keystrokes if you find you're running those commands frequently.

Don't forget -r when running objdump on an object file.  But, you
want to use  make drivers/md/whatever.s  if you want to see the
assembler code.

And that doesn't work for build-time tools, which I think is what
the original discussion was about.


Segher

Thread

Difficulties around "fixdep" for the usage of a kernel build output  directory SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-18 16:00 +0200
  Re: Difficulties around "fixdep" for the usage of a kernel build  output directory Jim Davis <jim.epost@gmail.com> - 2016-10-18 17:20 +0200
    Re: Difficulties around "fixdep" for the usage of a kernel build  output directory SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-18 18:40 +0200
      Re: Difficulties around "fixdep" for the usage of a kernel build  output directory Jim Davis <jim.epost@gmail.com> - 2016-10-18 19:00 +0200
        Re: Difficulties around "fixdep" for the usage of a kernel build  output directory SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-18 19:30 +0200
          Re: Difficulties around "fixdep" for the usage of a kernel build  output directory Jim Davis <jim.epost@gmail.com> - 2016-10-18 22:50 +0200
            Re: Challenges around the usage of different "HOSTCFLAGS" for kernel  build configuration and module generation SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-19 19:10 +0200
              Re: Challenges around the usage of different "HOSTCFLAGS" for kernel  build configuration and module generation Jim Davis <jim.epost@gmail.com> - 2016-10-19 22:00 +0200
                Re: Challenges around the usage of different "HOSTCFLAGS" for kernel build configuration and module generation Segher Boessenkool <segher@kernel.crashing.org> - 2016-10-20 00:10 +0200
                Re: Challenges around the usage of different "HOSTCFLAGS" for kernel  build configuration and module generation SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-20 09:40 +0200
                Re: Challenges around the usage of different "HOSTCFLAGS" for kernel  build configuration and module generation SF Markus Elfring <elfring@users.sourceforge.net> - 2016-10-20 08:40 +0200

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