linux-kernel - Re: "make rpm" failed with parameter "--scm-only"

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Message-ID: <4C46F930.1040506@suse.cz>
Date:	Wed, 21 Jul 2010 15:42:08 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	"Zheng, Jiajia" <jiajia.zheng@...el.com>
Cc:	"Guy, Wey-Yi W" <wey-yi.w.guy@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>
Subject: Re: "make rpm" failed with parameter "--scm-only"

On 21.7.2010 03:30, Zheng, Jiajia wrote:
> Michal Marek wrote:
>> were you able to test the fix? I'd like to send it to Linus.
>>
> Thank you. This patch works OK. 

Thanks a lot for testing it.

> But I still saw below warnings. Of course, it was not introduced by your patch because that I saw such warnings before. Could you also take a look if there's some problem with Makefile? 
> ...
> + make clean
> make[2]: warning: jobserver unavailable: using -j1.  Add `+' to parent make rule.

I found the explanation in the make info page:

`warning: jobserver unavailable: using -j1.  Add `+' to parent make rule.'
     In order for `make' processes to communicate, the parent will pass
     information to the child.  Since this could result in problems if
     the child process isn't actually a `make', the parent will only do
     this if it thinks the child is a `make'.  The parent uses the
     normal algorithms to determine this (*note How the `MAKE' Variable
     Works: MAKE Variable.).  If the makefile is constructed such that
     the parent doesn't know the child is a `make' process, then the
     child will receive only part of the information necessary. [...]

Which is our case: The parent make only sees the rpmbuild call. The fix
would probably be to clear all make environment variables before running
rpmbuild.

> + make -j4
> make[2]: warning: -jN forced in submake: disabling jobserver mode.

Another symptom of the same problem.


> I got a RPM package: kernel-2.6.35rc5wl+-6.x86_64.rpm

Great :).

Michal
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