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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH 7/7] mk: Add hierarchy-file support (linux	mod)
Date: Fri, 27 Nov 2015 16:01:03 +0000	[thread overview]
Message-ID: <20151127160103.GA32227@sivlogin002.ir.intel.com> (raw)
In-Reply-To: <7380042.Av6xXtCM9v@xps13>

On Fri, Nov 27, 2015 at 04:40:51PM +0100, Thomas Monjalon wrote:
> 2015-09-22 09:56, Panu Matilainen:
> > On 09/18/2015 11:33 PM, Mario Carrillo wrote:
> > > +MOD_DIR := $(DESTDIR)/lib/modules
> > > +KERNEL_DIR := $(shell uname -r)/extra
> > 
> > Please don't assume one is always building for the running kernel. 
> > Defaulting around uname -r is perfectly reasonable, but there needs to 
> > be a way to override it from the cli. For example rte.vars.mk has this:
> > 
> > # can be overriden by make command line or exported environment variable
> > RTE_KERNELDIR ?= /lib/modules/$(shell uname -r)/build
> 
> For info, the ?= operator is a way to give a default value after having
> included other makefiles which may set a different value.
> Both ?= and := (or simply =) are overriden by the command line.
> Only "override VAR =" will not be overriden by the command line.
> 

As far as I know only "?=" assignment overridden by command line.

Basic experiment:

# cat Makefile 
A ?= a
B := b
C = c

all:
        @echo $(A) $(B) $(C)

-----

# make
a b c

# A=x B=x C=x make
x b c


ferruh

  reply	other threads:[~2015-11-27 16:17 UTC|newest]

Thread overview: 150+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-18 20:33 [dpdk-dev] [PATCH 0/7] Add hierarchical support to make install Mario Carrillo
2015-09-18 20:33 ` [dpdk-dev] [PATCH 1/7] mk: Add hierarchy-file support Mario Carrillo
2015-09-18 20:33 ` [dpdk-dev] [PATCH 2/7] mk: Add hierarchy-file support (sbin) Mario Carrillo
2015-09-18 20:33 ` [dpdk-dev] [PATCH 3/7] mk: Add hierarchy-file support (doc) Mario Carrillo
2015-09-18 20:33 ` [dpdk-dev] [PATCH 4/7] mk: Add hierarchy-file support (app) Mario Carrillo
2015-09-18 20:33 ` [dpdk-dev] [PATCH 5/7] mk: Add hierarchy-file support (include) Mario Carrillo
2015-09-22  8:03   ` Panu Matilainen
2015-09-18 20:33 ` [dpdk-dev] [PATCH 6/7] mk: Add hierarchy-file support (lib) Mario Carrillo
2015-09-22  7:46   ` Panu Matilainen
2015-09-18 20:33 ` [dpdk-dev] [PATCH 7/7] mk: Add hierarchy-file support (linux mod) Mario Carrillo
2015-09-22  6:56   ` Panu Matilainen
2015-11-27 15:40     ` Thomas Monjalon
2015-11-27 16:01       ` Ferruh Yigit [this message]
2015-11-27 16:20         ` David Marchand
2015-11-27 16:23           ` Bruce Richardson
2015-11-27 16:48             ` Ferruh Yigit
2015-11-27 21:05         ` Arevalo, Mario Alfredo C
2015-09-22  6:29 ` [dpdk-dev] [PATCH 0/7] Add hierarchical support to make install Panu Matilainen
2015-09-22  8:00   ` Olivier MATZ
2015-09-22  8:34     ` Panu Matilainen
2015-09-22  9:00       ` Olivier MATZ
2015-09-22 10:14         ` Panu Matilainen
2015-09-22 10:36           ` Panu Matilainen
2015-09-22 14:40           ` Olivier MATZ
2015-09-23 14:54             ` Arevalo, Mario Alfredo C
2015-09-22 10:39         ` Neil Horman
2015-09-22  8:16 ` Olivier MATZ
2015-09-29  0:00 ` [dpdk-dev] [PATCH v2 0/8] Add instalation rules for dpdk files Mario Carrillo
2015-09-29  0:00   ` [dpdk-dev] [PATCH v2 1/8] mk: Add rule for installing headers Mario Carrillo
2015-09-29  8:49     ` Panu Matilainen
2015-09-29  0:00   ` [dpdk-dev] [PATCH v2 2/8] mk: Add rule for installing app files Mario Carrillo
2015-09-29  0:00   ` [dpdk-dev] [PATCH v2 3/8] mk: Add rule for installing libraries Mario Carrillo
2015-09-29  9:28     ` Panu Matilainen
2015-09-29  0:00   ` [dpdk-dev] [PATCH v2 4/8] mk: Add rule for installing modules Mario Carrillo
2015-09-29  0:01   ` [dpdk-dev] [PATCH v2 5/8] mk: Add rule for installing documentation Mario Carrillo
2015-09-29  0:01   ` [dpdk-dev] [PATCH v2 6/8] mk: Add rule for installing nic bind files Mario Carrillo
2015-09-29  0:01   ` [dpdk-dev] [PATCH v2 7/8] mk: Add rule for installing sdk files Mario Carrillo
2015-09-29  0:01   ` [dpdk-dev] [PATCH v2 8/8] mk: Add rule for installing runtime files Mario Carrillo
2015-10-01  0:11 ` [dpdk-dev] [PATCH v3 0/8] Add instalation rules for dpdk files Mario Carrillo
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 1/8] mk: Add rule for installing headers Mario Carrillo
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 2/8] mk: Add rule for installing app files Mario Carrillo
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 3/8] mk: Add rule for installing libraries Mario Carrillo
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 4/8] mk: Add rule for installing modules Mario Carrillo
2015-10-02 10:38     ` Panu Matilainen
2015-10-02 16:26       ` Arevalo, Mario Alfredo C
2015-10-05  7:13         ` Panu Matilainen
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 5/8] mk: Add rule for installing documentation Mario Carrillo
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 6/8] mk: Add rule for installing nic bind files Mario Carrillo
2015-10-02 10:49     ` Panu Matilainen
2015-10-02 10:54       ` Richardson, Bruce
2015-10-02 16:27         ` Arevalo, Mario Alfredo C
2015-11-27 15:52         ` Thomas Monjalon
2015-11-27 16:10           ` Bruce Richardson
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 7/8] mk: Add rule for installing sdk files Mario Carrillo
2015-10-01  0:11   ` [dpdk-dev] [PATCH v3 8/8] mk: Add rule for installing runtime files Mario Carrillo
2015-10-02 11:15     ` Panu Matilainen
2015-10-02 11:25       ` Bruce Richardson
2015-10-02 16:29       ` Arevalo, Mario Alfredo C
2015-10-12  9:28       ` Jan Blunck
2015-10-05 20:19 ` [dpdk-dev] [PATCH v4 0/7] Add instalation rules for dpdk files Mario Carrillo
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 1/7] mk: Add rule for installing headers Mario Carrillo
2015-10-16 19:29     ` Olivier MATZ
2015-10-19 23:35       ` Arevalo, Mario Alfredo C
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 2/7] mk: Add rule for installing app files Mario Carrillo
2015-10-16 19:30     ` Olivier MATZ
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 3/7] mk: Add rule for installing libraries Mario Carrillo
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 4/7] mk: Add rule for installing modules Mario Carrillo
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 5/7] mk: Add rule for installing documentation Mario Carrillo
2015-10-16 19:30     ` Olivier MATZ
2015-10-19 23:36       ` Arevalo, Mario Alfredo C
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 6/7] mk: Add rule for installing sdk files Mario Carrillo
2015-10-16 19:31     ` Olivier MATZ
2015-10-19 14:00       ` Panu Matilainen
2015-10-05 20:20   ` [dpdk-dev] [PATCH v4 7/7] mk: Add rule for installing runtime files Mario Carrillo
2015-10-10 17:45   ` [dpdk-dev] [PATCH v4 0/7] Add instalation rules for dpdk files Arevalo, Mario Alfredo C
2015-10-15 12:32     ` Panu Matilainen
2015-10-14 15:58   ` Miguel Bernal Marin
2015-10-16 19:32   ` Olivier MATZ
2015-10-30  1:47 ` [dpdk-dev] [PATCH v5 00/10] " Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 01/10] mk: Add rule for installing headers Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 02/10] mk: Add rule for installing app files Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 03/10] mk: Add rule for installing libraries Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 04/10] mk: Add rule for installing modules Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 05/10] mk: Add rule for installing documentation Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 06/10] mk: Add rule for installing sdk files Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 07/10] mk: Add rule for installing runtime files Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 08/10] mk: Rename install rule as mbuild rule Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 09/10] mk: Add new install rule Mario Carrillo
2015-10-30  1:47   ` [dpdk-dev] [PATCH v5 10/10] doc: Add information about new installation rules Mario Carrillo
2015-11-10 17:07 ` [dpdk-dev] [PATCH v6 00/10] Add installation rules for dpdk files Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 01/10] mk: Add rule for installing headers Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 02/10] mk: Add rule for installing app files Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 03/10] mk: Add rule for installing libraries Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 04/10] mk: Add rule for installing modules Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 05/10] mk: Add rule for installing documentation Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 06/10] mk: Add rule for installing sdk files Mario Carrillo
2015-11-30 16:20     ` Thomas Monjalon
2015-11-30 16:26       ` Arevalo, Mario Alfredo C
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 07/10] mk: Add rule for installing runtime files Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 08/10] mk: Rename install rule as mbuild rule Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 09/10] mk: Add new install rule Mario Carrillo
2015-11-10 17:07   ` [dpdk-dev] [PATCH v6 10/10] doc: Add information about new installation rules Mario Carrillo
2015-11-10 17:18   ` [dpdk-dev] [PATCH v6 00/10] Add installation rules for dpdk files Aaron Conole
2015-11-10 23:25     ` Arevalo, Mario Alfredo C
2015-11-11 10:48       ` Bruce Richardson
2015-11-11 17:43         ` Arevalo, Mario Alfredo C
2015-12-01  0:53 ` [dpdk-dev] [PATCH v7 00/11] " Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 01/11] mk: Add rule for installing headers Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 02/11] mk: Add rule for installing app files Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 03/11] mk: Add rule for installing libraries Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 04/11] mk: Add rule for installing modules Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 05/11] mk: Add rule for installing documentation Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 06/11] mk: Add rule for installing sdk files Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 07/11] mk: Add rule for installing runtime files Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 08/11] app: Change name to test binary Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 09/11] mk: Rename install rule as mbuild rule Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 10/11] mk: Add new install rule Mario Carrillo
2015-12-01  0:53   ` [dpdk-dev] [PATCH v7 11/11] doc: Add information about new installation rules Mario Carrillo
2015-12-01 11:11     ` Mcnamara, John
2015-12-01 12:08     ` Mcnamara, John
2015-12-01 13:36       ` Arevalo, Mario Alfredo C
2015-12-01 19:17   ` [dpdk-dev] [PATCH v7 00/11] Add installation rules for dpdk files Thomas Monjalon
2015-12-01 19:36     ` Arevalo, Mario Alfredo C
2015-12-01 19:39 ` [dpdk-dev] [PATCH v8 " Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 01/11] mk: Add rule for installing headers Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 02/11] mk: Add rule for installing app files Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 03/11] mk: Add rule for installing libraries Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 04/11] mk: Add rule for installing modules Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 05/11] mk: Add rule for installing documentation Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 06/11] mk: Add rule for installing sdk files Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 07/11] mk: Add rule for installing runtime files Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 08/11] app: Change name to test binary Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 09/11] mk: Rename install rule as mbuild rule Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 10/11] mk: Add new install rule Mario Carrillo
2015-12-01 19:39   ` [dpdk-dev] [PATCH v8 11/11] doc: Add information about new installation rules Mario Carrillo
2015-12-02  9:33   ` [dpdk-dev] [PATCH v8 00/11] Add installation rules for dpdk files Panu Matilainen
2015-12-02 23:04     ` Arevalo, Mario Alfredo C
2015-12-03 21:37 ` [dpdk-dev] [PATCH v9 " Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 01/11] mk: Add rule for installing headers Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 02/11] mk: Add rule for installing app files Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 03/11] mk: Add rule for installing libraries Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 04/11] mk: Add rule for installing modules Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 05/11] mk: Add rule for installing documentation Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 06/11] mk: Add rule for installing sdk files Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 07/11] mk: Add rule for installing runtime files Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 08/11] app: Change name to test binary Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 09/11] mk: Rename install rule as mbuild rule Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 10/11] mk: Add new install rule Mario Carrillo
2015-12-03 21:37   ` [dpdk-dev] [PATCH v9 11/11] doc: Add information about new installation rules Mario Carrillo
2015-12-04 15:38   ` [dpdk-dev] [PATCH v9 00/11] Add installation rules for dpdk files Thomas Monjalon

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