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From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
To: Neil Horman <nhorman@tuxdriver.com>
Cc: dev@dpdk.org, Bruce Richardson <bruce.richardson@intel.com>,
	Thomas Monjalon <thomas@monjalon.net>,
	robin.jarry@6wind.com
Subject: Re: [dpdk-dev] [RFC PATCH 0/2] pmdinfogen: rewrite in Python
Date: Thu, 2 Jul 2020 03:07:43 +0300
Message-ID: <20200702030743.44349af4@sovereign> (raw)
In-Reply-To: <20200623112806.GA301645@hmswarspite.think-freely.org>

On Tue, 23 Jun 2020 07:28:06 -0400 Neil Horman wrote:
> On Mon, Jun 22, 2020 at 10:39:46PM +0300, Dmitry Kozlyuk wrote:
> > On Mon, 22 Jun 2020 08:41:17 -0400, Neil Horman wrote:  
> > > On Mon, Jun 22, 2020 at 03:45:01AM +0300, Dmitry Kozlyuk wrote:  
[snip]  
> > I was talking about these fields of struct elf_info:
> > 
> > 	/* if Nth symbol table entry has .st_shndx = SHN_XINDEX,
> > 	 * take shndx from symtab_shndx_start[N] instead
> > 	 */
> > 	Elf32_Word   *symtab_shndx_start;
> > 	Elf32_Word   *symtab_shndx_stop;
> > 
> > They are not used after being filled in parse_elf() and their endianness
> > fixed in the end despite the comment.
> >   
> Its been a while since I wrote this, so I need to go back and look closely, but
> as you say, these values aren't used after parse_elf completes, but they are(I
> think) used to correct the endianess of the section header index table, so that
> get_sym_value works properly.  You would (again I think), only note a problem if
> you were parsing an ELF file for an architecture with an endianess opposite that
> of what you are building on (i.e. an x86 system cross compiling for a powerpc
> target).

Thanks for the explanation. Anyway, it's yet another point to prefer
pyelftools to parsing ELF manually.


[snip]
> > Native builds can use Python or PowerShell, which is as capable as Unix
> > shells, but incompatible with them. To call lib.exe (MSVC analog of ar) is
> > probably simpler then parsing COFF, yes. So meson could select one of the
> > following for a Windows target (objects are COFF):
> > 
> > Host     Toolchain  Archive  Script      Extractor
> > -------  ---------  -------  ---------   ---------
> > Linux    MinGW      .a       sh          ar
> > Windows  MinGW      .a       PowerShell  ar
> > Windows  Clang      .lib     PowerShell  lib  
> I think if I read you right, what you're suggesting here is that meson setup a
> build time marco $ARCHIVETOOL, and set it to ar or lib.exe depending on the
> build environment, and just have the script in question use $ARCHIVER?  If so,
> I'd be good with that.  Do we have to worry about the use of divergent command
> line options for each tool as well?

As I said, PowerShell cannot consume the same shell script. My suggestion was
to have two scripts, one existing for shell and ar (used by Linux host), and
one new PowerShell script for both lib.exe and ar (used by Windows host).
Meson then would select which script to call. Another option is to have one
wrapper Python script for all hosts: a few extra lines to launch archiver,
but less files and no need to know shell/PowerShell when changing this part.
(I believe Bruce means the same.)  But it will still be a separate script.

-- 
Dmitry Kozlyuk

  parent reply	other threads:[~2020-07-02  0:07 UTC|newest]

Thread overview: 88+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-22  0:45 Dmitry Kozlyuk
2020-06-22  0:45 ` [dpdk-dev] [RFC PATCH 1/2] pmdinfogen: prototype " Dmitry Kozlyuk
2020-06-22  0:45 ` [dpdk-dev] [RFC PATCH 2/2] build: use Python pmdinfogen Dmitry Kozlyuk
2020-06-22 12:41 ` [dpdk-dev] [RFC PATCH 0/2] pmdinfogen: rewrite in Python Neil Horman
2020-06-22 19:39   ` Dmitry Kozlyuk
2020-06-23 11:28     ` Neil Horman
2020-06-23 11:59       ` Bruce Richardson
2020-07-02  0:07       ` Dmitry Kozlyuk [this message]
2020-07-02  0:02 ` [dpdk-dev] [RFC PATCH v2 " Dmitry Kozlyuk
2020-07-02  0:02   ` [dpdk-dev] [RFC PATCH v2 1/3] pmdinfogen: prototype " Dmitry Kozlyuk
2020-07-02  0:02   ` [dpdk-dev] [RFC PATCH v2 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2020-07-02  0:02   ` [dpdk-dev] [RFC PATCH v2 3/3] doc/linux_gsg: require pyelftools for pmdinfogen Dmitry Kozlyuk
2020-07-06 12:52     ` Neil Horman
2020-07-06 13:24       ` Dmitry Kozlyuk
2020-07-06 16:46         ` Neil Horman
2020-07-08  0:53   ` [dpdk-dev] [PATCH v3 0/4] pmdinfogen: rewrite in Python Dmitry Kozlyuk
2020-07-08  0:53     ` [dpdk-dev] [PATCH v3 1/4] pmdinfogen: add Python implementation Dmitry Kozlyuk
2020-07-08  0:53     ` [dpdk-dev] [PATCH v3 2/4] build: use Python pmdinfogen Dmitry Kozlyuk
2020-07-08  0:53     ` [dpdk-dev] [PATCH v3 3/4] doc/linux_gsg: require pyelftools for pmdinfogen Dmitry Kozlyuk
2020-07-08  0:53     ` [dpdk-dev] [PATCH v3 4/4] pmdinfogen: remove C implementation Dmitry Kozlyuk
2020-07-08 21:23     ` [dpdk-dev] [PATCH v4 0/4] pmdinfogen: rewrite in Python Dmitry Kozlyuk
2020-07-08 21:23       ` [dpdk-dev] [PATCH v4 1/4] pmdinfogen: add Python implementation Dmitry Kozlyuk
2020-07-08 21:23       ` [dpdk-dev] [PATCH v4 2/4] build: use Python pmdinfogen Dmitry Kozlyuk
2020-07-21 14:04         ` Bruce Richardson
2020-07-21 14:59           ` Dmitry Kozlyuk
2020-07-08 21:23       ` [dpdk-dev] [PATCH v4 3/4] doc/linux_gsg: require pyelftools for pmdinfogen Dmitry Kozlyuk
2020-07-21 13:39         ` Bruce Richardson
2020-07-21 14:05           ` Bruce Richardson
2020-07-21 14:04         ` Bruce Richardson
2020-07-08 21:23       ` [dpdk-dev] [PATCH v4 4/4] pmdinfogen: remove C implementation Dmitry Kozlyuk
2020-07-09 10:42       ` [dpdk-dev] [PATCH v4 0/4] pmdinfogen: rewrite in Python Neil Horman
2020-07-21 13:51       ` Bruce Richardson
2020-09-27 21:47       ` [dpdk-dev] [PATCH v5 0/3] " Dmitry Kozlyuk
2020-09-27 21:47         ` [dpdk-dev] [PATCH v5 1/3] pmdinfogen: add Python implementation Dmitry Kozlyuk
2020-09-27 22:05           ` Stephen Hemminger
2020-09-27 21:47         ` [dpdk-dev] [PATCH v5 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2020-09-27 21:47         ` [dpdk-dev] [PATCH v5 3/3] pmdinfogen: remove C implementation Dmitry Kozlyuk
2020-09-27 23:15           ` Thomas Monjalon
2020-09-28  9:35         ` [dpdk-dev] [PATCH v5 0/3] pmdinfogen: rewrite in Python David Marchand
2020-10-04  1:59         ` [dpdk-dev] [PATCH v6 " Dmitry Kozlyuk
2020-10-04  1:59           ` [dpdk-dev] [PATCH v6 1/3] pmdinfogen: add Python implementation Dmitry Kozlyuk
2020-10-04  1:59           ` [dpdk-dev] [PATCH v6 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2020-10-04  1:59           ` [dpdk-dev] [PATCH v6 3/3] pmdinfogen: remove C implementation Dmitry Kozlyuk
2020-10-14 14:37           ` [dpdk-dev] [PATCH v6 0/3] pmdinfogen: rewrite in Python Maxime Coquelin
2020-10-14 15:40             ` Dmitry Kozlyuk
2020-10-14 18:31           ` [dpdk-dev] [PATCH v7 " Dmitry Kozlyuk
2020-10-14 18:31             ` [dpdk-dev] [PATCH v7 1/3] pmdinfogen: add Python implementation Dmitry Kozlyuk
2020-10-14 18:31             ` [dpdk-dev] [PATCH v7 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2020-10-14 18:31             ` [dpdk-dev] [PATCH v7 3/3] pmdinfogen: remove C implementation Dmitry Kozlyuk
2020-10-20 16:02             ` [dpdk-dev] [PATCH v7 0/3] pmdinfogen: rewrite in Python David Marchand
2020-10-20 17:45               ` Dmitry Kozlyuk
2020-10-20 22:09               ` Dmitry Kozlyuk
2020-10-20 17:44             ` [dpdk-dev] [PATCH v8 " Dmitry Kozlyuk
2020-10-20 17:44               ` [dpdk-dev] [PATCH v8 1/3] pmdinfogen: add Python implementation Dmitry Kozlyuk
2020-10-20 17:44               ` [dpdk-dev] [PATCH v8 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2020-10-21  9:00                 ` Bruce Richardson
2021-01-20  0:05                 ` Thomas Monjalon
2021-01-20  7:23                   ` Dmitry Kozlyuk
2021-01-20 10:24                     ` Thomas Monjalon
2021-01-22 20:31                       ` Dmitry Kozlyuk
2021-01-22 20:57                         ` Thomas Monjalon
2021-01-22 22:24                           ` Dmitry Kozlyuk
2021-01-23 11:38                             ` Thomas Monjalon
2021-01-24 20:52                               ` Dmitry Kozlyuk
2021-01-25  9:25                               ` Kinsella, Ray
2021-01-25 10:01                                 ` Kinsella, Ray
2021-01-25 10:29                                   ` David Marchand
2021-01-25 10:46                                     ` Kinsella, Ray
2021-01-25 11:03                                       ` Thomas Monjalon
2021-01-25 10:05                                 ` Dmitry Kozlyuk
2021-01-25 10:11                                   ` Kinsella, Ray
2021-01-25 10:31                                     ` Dmitry Kozlyuk
2020-10-20 17:44               ` [dpdk-dev] [PATCH v8 3/3] pmdinfogen: remove C implementation Dmitry Kozlyuk
2020-10-26 16:46                 ` Jie Zhou
2021-01-22 22:43               ` [dpdk-dev] [PATCH v9 0/3] pmdinfogen: rewrite in Python Dmitry Kozlyuk
2021-01-22 22:43                 ` [dpdk-dev] [PATCH v9 1/3] pmdinfogen: add Python implementation Dmitry Kozlyuk
2021-01-22 22:43                 ` [dpdk-dev] [PATCH v9 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2021-01-22 22:43                 ` [dpdk-dev] [PATCH v9 3/3] pmdinfogen: remove C implementation Dmitry Kozlyuk
2021-01-24 20:51                 ` [dpdk-dev] [PATCH v10 0/3] pmdinfogen: rewrite in Python Dmitry Kozlyuk
2021-01-24 20:51                   ` [dpdk-dev] [PATCH v10 1/3] pmdinfogen: add Python implementation Dmitry Kozlyuk
2021-01-24 20:51                   ` [dpdk-dev] [PATCH v10 2/3] build: use Python pmdinfogen Dmitry Kozlyuk
2021-01-25 10:12                     ` Thomas Monjalon
2021-01-24 20:51                   ` [dpdk-dev] [PATCH v10 3/3] pmdinfogen: remove C implementation Dmitry Kozlyuk
2021-01-25 13:13                   ` [dpdk-dev] [PATCH v10 0/3] pmdinfogen: rewrite in Python Thomas Monjalon
2021-01-25 16:08                     ` Brandon Lo
2021-02-02  8:48                       ` Tal Shnaiderman
2021-01-25 18:51                   ` Ali Alnubani
2021-01-25 22:15                     ` Dmitry Kozlyuk

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