Kernel configuration - Revision history

Marcel: Add instructions for cross-architecture configuring and upgrading old configurations.

2014-06-29T10:28:44Z

Add instructions for cross-architecture configuring and upgrading old configurations.

← Older revision		Revision as of 10:28, 29 June 2014
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	<pre>make mrproper</pre>		<pre>make mrproper</pre>

	Next, create a default configuration. This ~~is not strictly necessary, but it~~ gives you a basis to build your own configuration on:		Next, create a default configuration. This gives you a basis to build your own configuration on. You can create kernel configurations for other CPU's than you are currently using by supplying the '''ARCH=<TYPE>''' option:

	<pre>make defconfig</pre>		<pre>make ARCH=x86_64 defconfig</pre>

			or

			<pre>make ARCH=i386 defconfig</pre>

			If you already have a configuration file from an earlier build, you can upgrade it in stead of starting from scratch. Replace '''x86_64''' in the next command with your target architecture:

			<pre>cp -v <LOCATION OF OLD CONFIG> .config
			make ARCH=x86_64 oldconfig</pre>

	The kernel source comes with a configuration tool included called <code>menuconfig</code>. Menuconfig has an ncurses based text user interface, which allows easy selection of the features you like to include in your kernel.		The kernel source comes with a configuration tool included called <code>menuconfig</code>. Menuconfig has an ncurses based text user interface, which allows easy selection of the features you like to include in your kernel.
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	<pre>sudo apt-get install ncurses-dev</pre>		<pre>sudo apt-get install ncurses-dev</pre>

	Then, start the configuration tool:		Then, start the configuration tool. Replace '''x86_64''' in the next command with your target architecture:

	<pre>make menuconfig</pre>		<pre>make ARCH=x86_64 menuconfig</pre>

	You can navigate the menu using the up and down keys, pressing enter to enter a submenu.		You can navigate the menu using the up and down keys, pressing enter to enter a submenu.

Marcel at 14:01, 14 June 2014

2014-06-14T14:01:35Z

← Older revision		Revision as of 14:01, 14 June 2014
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			[[Category:Documentation]]
	Configuring your kernel is something that is often overlooked by new LFScript users. However, it is very important that you create a configuration file. It often makes the difference between a usable system and one that only gives you a kernel panic.		Configuring your kernel is something that is often overlooked by new LFScript users. However, it is very important that you create a configuration file. It often makes the difference between a usable system and one that only gives you a kernel panic.

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	<pre>cd ../../		<pre>cd ../../
	rm -rf sources/linux-3.*/</pre>		rm -rf sources/linux-3.*/</pre>

	== Using your configuration with LFScript ==		== Using your configuration with LFScript ==

Marcel: /* Using your configuration with LFScript */

2012-01-31T20:58:08Z

Using your configuration with LFScript

← Older revision		Revision as of 20:58, 31 January 2012
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	== Using your configuration with LFScript ==		== Using your configuration with LFScript ==

			You can present your configuration to LFScript with the [[LFScript Switches\|-k switch]]:

			<pre>./lfscript <options> -k my_kernel.config</pre>

			The following command will rebuild your kernel, this may be useful if you have changed your configuration file:

			<pre>./lfscript -BU kernel -k my_kernel.config</pre>

Marcel: fix typo

2012-01-31T20:54:20Z

fix typo

← Older revision		Revision as of 20:54, 31 January 2012
Line 79:		Line 79:

	<pre>cd ../../		<pre>cd ../../
	rm -rf sources/linux.3.*/</pre>		rm -rf sources/linux-3.*/</pre>

	== Using your configuration with LFScript ==		== Using your configuration with LFScript ==

Marcel: /* Saving your configuration */

2012-01-31T20:53:38Z

Saving your configuration

← Older revision		Revision as of 20:53, 31 January 2012
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	== Saving your configuration ==		== Saving your configuration ==

			When you quit the configuration tool, it will ask you if you want to save your configuration; Choose "yes".

			Next, move the configuration file out of the kernel source:

			<pre>cp -v .config ../../my_kernel.config</pre>

			You don't need the kernel source tree any more, so remove it:

			<pre>cd ../../
			rm -rf sources/linux.3.*/</pre>

	== Using your configuration with LFScript ==		== Using your configuration with LFScript ==

Marcel: /* Important things to include */

2012-01-31T20:48:29Z

Important things to include

@@ Line 44: / Line 44: @@
 Recent development versions of LFS require you to include support for <code>devtmpfs</code>:
-<pre>Device Drivers  --->
+<pre>Device Drivers --->
-   Generic Driver Options  --->
+   Generic Driver Options --->
       Maintain a devtmpfs filesystem to mount at /dev</pre>
 == Saving your configuration ==
 == Using your configuration with LFScript ==

Marcel at 20:38, 31 January 2012

2012-01-31T20:38:56Z

← Older revision		Revision as of 20:38, 31 January 2012
Line 26:		Line 26:
	<pre>make defconfig</pre>		<pre>make defconfig</pre>

	The kernel source comes with a configuration tool included called <code>menuconfig</code>. Menuconfig is an ncurses based text user interface, which allows easy selection of the features you like to include in your kernel.		The kernel source comes with a configuration tool included called <code>menuconfig</code>. Menuconfig has an ncurses based text user interface, which allows easy selection of the features you like to include in your kernel.

			If your host system does not have the ncurses development package installed, the command may fail. On Ubuntu, for example you may need to run the next command, prior to <code>make menuconfig</code>:

			<pre>sudo apt-get install ncurses-dev</pre>

			Then, start the configuration tool:

	<pre>make menuconfig</pre>		<pre>make menuconfig</pre>

	~~If your host system does not have~~ the ~~ncurses development package installed,~~ the ~~command may fail. On Ubuntu~~, ~~for example you may need~~ to ~~run the next command, prior to <code>make menuconfig</code>:~~		You can navigate the menu using the up and down keys, pressing enter to enter a submenu.

	<~~pre~~>~~sudo apt-get install ncurses-dev~~</~~pre~~>		To select an option to include in the kernel, press <code>Y</code>. The option should become prefixed with a checked box: <code>[*]</code>.

	=== Important things to include ===		=== Important things to include ===

			Recent development versions of LFS require you to include support for <code>devtmpfs</code>:

			<pre>Device Drivers --->
			Generic Driver Options --->
			Maintain a devtmpfs filesystem to mount at /dev</pre>

	== Saving your configuration ==		== Saving your configuration ==

	== Using your configuration with LFScript ==		== Using your configuration with LFScript ==

Marcel at 20:32, 31 January 2012

2012-01-31T20:32:55Z

@@ Line 2: / Line 2: @@
 == Downloading the kernel source ==
 == Configuring the kernel ==
 === Important things to include ===

Marcel: Created page with "Configuring your kernel is something that is often overlooked by new LFScript users. However, it is very important that you create a configuration file. It often makes the dif..."

2012-01-31T20:21:59Z

Created page with "Configuring your kernel is something that is often overlooked by new LFScript users. However, it is very important that you create a configuration file. It often makes the dif..."

New page

Configuring your kernel is something that is often overlooked by new LFScript users. However, it is very important that you create a configuration file. It often makes the difference between a usable system and one that only gives you a kernel panic.

== Downloading the kernel source ==

== Configuring the kernel ==

=== Important things to include ===

== Saving your configuration ==

== Using your configuration with LFScript ==