From: Yann E. MORIN <yann.morin.1998@anciens.enib.fr>
To: buildroot@busybox.net
Subject: [Buildroot] how BR download the linux kernel now
Date: Tue, 12 Jul 2011 22:59:13 +0200 [thread overview]
Message-ID: <201107122259.14014.yann.morin.1998@anciens.enib.fr> (raw)
In-Reply-To: <CAAa76NT59eY9Kbhej2vyk23GBP-ofu5FyApsnHpsgHvSLzZaNQ@mail.gmail.com>
Raymond, All,
On Tuesday 12 July 2011 22:26:49 raymond zhao wrote:
> I checked out the latest version of the buildroot, and noticed that
> the linux.mk was changed a lot. Thomas checked in a version with log
> message "linux: convert to the GENTARGETS infrastructure". And, from
> there, I am confused. How the BR download the linux kernel now? I
> mean, before this version, there are download, extraction and patch.
> But they are removed and there is only LINUX_DOWNLOAD_PATCHES in the
> new version. Where is the script for BR to download the kernel source
> code now?
In a word, it's automagic, now! :-)
In a hundred words, look at linux/linux.mk:
- on line 9-28, we set the two variables LINUX_SITE and LINUX_TARBALL
depending on the user's options
- on line 180, we call GENTARGETS that generates all the reuired rules
- the variable LINUX_SITE tells where the kernel is to be get from
- the variable LINUX_TARBALL tells the tarball's file name
- the function GENTARGETS instantiates download+extract+build+install rules
for the specified package
GENTARGETS is defined in package/Makefile.package.in
It's the basis for the generic package infrastructure. It's a bit complex,
but that Makefile is rather pretty well commented. Also, you can have a
look at the doc:
http://buildroot.org/buildroot.html#add_packages
http://buildroot.org/buildroot.html#generic-reference
Regards,
Yann E. MORIN.
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next prev parent reply other threads:[~2011-07-12 20:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-12 20:26 [Buildroot] how BR download the linux kernel now raymond zhao
2011-07-12 20:59 ` Yann E. MORIN [this message]
2011-07-12 22:03 ` raymond zhao
2011-07-13 7:46 ` Thomas Petazzoni
2011-07-13 13:31 raymond zhao
2011-07-13 14:14 ` Thomas Petazzoni
2011-08-23 20:30 ` raymond zhao
2011-09-01 7:12 ` Thomas Petazzoni
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