Kernel Building: Difference between revisions
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m (Add recursive rm option for removing old modules from the ramdisk image.) |
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#REDIRECT [[Kernel]] |
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;Note: it is recommended that you build an RPM ([[Rebuilding OLPC kernel]]) unless you are already familiar with kernel development! |
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== Building an OLPC kernel == |
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After obtaining the OLPC source (and if desired, making changes), the following steps can be taken to build a kernel on any Fedora Core 6 machine: |
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make oldconfig |
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make |
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make modules_install # as root |
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tar zcvf kern.tar.gz arch/i386/boot/bzImage System.map /lib/modules/$VERS |
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;Warning!:this needs root and will trash your /lib/modules, if you happen to already have same version. Use "make INSTALL_MOD_PATH=/somewhere modules_install" if you want to avoid using root). |
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Replace $VERS above with the proper kernel version that has been built. |
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Assuming everything builds correctly, you will be left with kern.tar.gz. This can be copied over to an XO laptop, and the following steps will install the kernel (again, replacing $VERS with the kernel version): |
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cd / |
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tar zxvf .../kern.tar.gz |
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mv System.map /versions/boot/current/boot/System.map-$VERS |
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mv arch/i386/boot/bzImage /versions/boot/current/boot/vmlinuz-$VERS |
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ln -sf /versions/boot/current/boot/vmlinuz-$VERS /versions/boot/current/boot/vmlinuz |
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If not booting off NAND, you'll probably want to skip the /versions/boot/current/ prefix on the paths above. A limited number of kernel modules are required by the ramdisk during the boot process; if you need to update the ramdisk, these additional steps are also necessary: |
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# mkdir /tmp/X ; cd /tmp/X |
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# zcat /versions/boot/current/boot/olpcrd.img | cpio -i |
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# rm -r lib/modules |
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# cp -r /lib/modules lib/ |
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# find . -print | cpio -H newc -o | gzip -9 > /versions/boot/current/boot/olpcrd.img |
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[[Category:Developers]] |
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[[Category:OS]] |
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[[Category:Software]] |
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[[Category:Build system]] |
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Latest revision as of 14:52, 21 February 2011
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