netdev - Re: [net-next PATCH V3 1/5] samples/bpf: add back functionality to redefine LLC command

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Message-ID: <20160427080609.GB14936@naverao1-tp.in.ibm.com>
Date:	Wed, 27 Apr 2016 13:36:33 +0530
From:	"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
Cc:	netdev@...r.kernel.org, linux-kbuild@...r.kernel.org,
	bblanco@...mgrid.com, borkmann@...earbox.net,
	alexei.starovoitov@...il.com
Subject: Re: [net-next PATCH V3 1/5] samples/bpf: add back functionality to
 redefine LLC command

On 2016/04/27 09:30AM, Jesper Dangaard Brouer wrote:
> It is practical to be-able-to redefine the location of the LLVM
> command 'llc', because not all distros have a LLVM version with bpf
> target support.  Thus, it is sometimes required to compile LLVM from
> source, and sometimes it is not desired to overwrite the distros
> default LLVM version.
> 
> This feature was removed with 128d1514be35 ("samples/bpf: Use llc in
> PATH, rather than a hardcoded value").
> 
> Add this features back. Note that it is possible to redefine the LLC
> on the make command like:
> 
>  make samples/bpf/ LLC=~/git/llvm/build/bin/llc

Why not do:
  PATH=~/git/llvm/build/bin:$PATH make samples/bpf/

..if you wish to override clang/llc only for building bpf samples?
Or, just export the updated $PATH:
  export PATH=~/git/llvm/build/bin:$PATH
  make samples/bpf


- Naveen