2015-04-02 17:41:12 +02:00
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====================
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RescueOS build HOWTO
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These instructions are for folks who want to modify RescueOS and make their
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own images. If you just want to use RescueOS on your N900, you'll want to
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get one of the prebuilt images and look at 'documentation.txt' for usage
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info.
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RescueOS images are modified buildroot images. This source distribution is
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just a collection of config files, patches, etc. that configure and customize
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buildroot builds.
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You'll need a GNU/Linux system to host the build. You'll need 'git' and
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'quilt' to checkout the RescueOS source and apply our buildroot patches,
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respectively. Once that's done, you'll also need to satisfy buildroot's
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prerequisites; we'll address that later.
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These files are meant to be used with version 2013.02 of buildroot. (Ports to
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newer versions are welcome.)
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Start by unpacking the RescueOS and buildroot sources into separate
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directories. We recommend putting the two directories next to each other under
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a common parent directory:
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$ mkdir rescueos-build
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$ cd rescueos-build
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Use git to checkout the RescueOS source. It will go into a subdirectory named
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'N900_RescueOS'.
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$ git clone <rescueos repository url>
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Fetch, verify, and unpack the buildroot source. It will end up in a
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subdirectory named 'buildroot-2013.02'.
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$ wget http://www.buildroot.org/downloads/buildroot-2013.02.tar.bz2
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$ wget http://www.buildroot.org/downloads/buildroot-2013.02.tar.bz2.sign
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$ gpg --recv-keys B025BA8B59C36319
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$ gpg --verify buildroot-2013.02.tar.bz2.sign
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2015-04-05 12:56:17 +02:00
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$ compare the checksums in buildroot-2013.02.tar.bz2.sign with the actual checksums of buildroot-2013.02.tar.bz2 (it's not a detached signature)
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2015-04-02 17:41:12 +02:00
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$ tar --extract --bzip --file buildroot-2013.02.tar.bz2
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Buildroot's prerequisites are documented in the "System requirements" section
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of the buildroot manual ('buildroot-2013.02/docs/manual/manual.html'). Install them if necessary.
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Now apply our buildroot patches with quilt.
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$ cd buildroot-2013.02
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$ QUILT_PATCHES=../N900_RescueOS/buildroot-patches quilt push -a
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Point buildroot to the RescueOS configuration:
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$ make defconfig BR2_DEFCONFIG=../N900_RescueOS/buildrootconfig
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Invoke buildroot to build RescueOS:
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$ make
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Buildroot will download and build a whole bunch of packages, starting with the
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cross-compiling toolchain. When it's done, kernel and cramfs images will be
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left in 'buildroot-2013.02/output/images'.
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