linux-kernel - Re: [PATCH, resend] build: fix broken kernel RPM source symlink

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Date:	Wed, 08 Jul 2015 18:56:22 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Espen Carlsen <ec@...ascale.com>
Cc:	'Michal Marek' <mmarek@...e.cz>, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	'Daniel J Blueman' <daniel@...ascale.com>,
	'Steffen Persvold' <sp@...ascale.com>
Subject: Re: [PATCH, resend] build: fix broken kernel RPM source symlink

[I resisted looking into the flood of info you included in this message.
But this part could turn out to be interesting.]

On ma, 2015-07-06 at 21:37 +0200, Espen Carlsen wrote:
> This is the how BUILDROOT looks after rpmbuild -bi kernel-4.1.0.spec 
> on an Ubuntu system, notice that on Ubuntu, there are already a 
> 'build' and 'source' symlink before the ln -sf commands are issued, 
> CentOS however doesn't have those links on the same step.
> user@...ld-ubuntu:/srv/user/rpmbuild$ rpmbuild -bi SPECS/kernel-4.1.0.spec

That is outside the realm of "make rpm".

I assume kernel-4.1.0.spec was a copy, somehow made, of kernel.spec as
was created by "make rpm". Does it matter, for the issue you ran into,
whether "make rpm" or "rpmbuild -bb SPECS/kernel.spec" is involved?

> user@...ld-ubuntu:/srv/user/rpmbuild/BUILDROOT/kernel-4.1.0-1.x86_64/lib/modules/4.1.0$ ls -gG
> total 64
> lrwxrwxrwx 1    35 Jul  6 18:56 build -> /srv/user/rpmbuild/BUILD/kernel-4.1.0
> [...]
> lrwxrwxrwx 1    35 Jul  6 19:00 source -> /srv/user/rpmbuild/BUILD/kernel-4.1.0

These two links are, I think, generated in this snippet from the main
Makefile:
_modinst_:
        @rm -rf $(MODLIB)/kernel
        @rm -f $(MODLIB)/source
        @mkdir -p $(MODLIB)/kernel
        @ln -s `cd $(srctree) && /bin/pwd` $(MODLIB)/source
        @if [ ! $(objtree) -ef  $(MODLIB)/build ]; then \
                rm -f $(MODLIB)/build ; \
                ln -s $(CURDIR) $(MODLIB)/build ; \
        fi
        @cp -f $(objtree)/modules.order $(MODLIB)/
        @cp -f $(objtree)/modules.builtin $(MODLIB)/
        $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst

I wonder why you don't see similar links when building on CentOS. I saw
similar links in rpm's BUILDROOT when building on Fedora 22.

Thanks,


Paul Bolle
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