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Update README.md

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- Add basic board building
- Remove xen as Heads dependency
- change musl-cross in text to musl-cross-make to reflect new building tools reality
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tlaurion 2020-03-09 14:21:46 -04:00 committed by GitHub
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@ -28,11 +28,12 @@ Please refer to [Heads-wiki](https://github.com/osresearch/heads-wiki/blob/maste
Building heads
===
`make BOARD=board_name` where board_name is the name of the board directory under `./boards` directory.
In order to build reproducible firmware images, Heads builds a specific
version of gcc and uses it to compile the Linux kernel and various tools
that go into the initrd. Unfortunately this means the first step is a
little slow since it will clone the `musl-cross` tree and build gcc...
little slow since it will clone the `musl-cross-make` tree and build gcc...
Once that is done, the top level `Makefile` will handle most of the
remaining details -- it downloads the various packages, verifies the
@ -57,7 +58,6 @@ directory and include:
* [lvm2](https://sourceware.org/lvm2/)
* [gnupg](https://www.gnupg.org/)
* [Linux kernel](https://kernel.org)
* [Xen hypervisor](https://www.xenproject.org/)
We also recommend installing [Qubes OS](https://www.qubes-os.org/),
although there Heads can `kexec` into any Linux or
@ -69,7 +69,7 @@ Notes:
* Building coreboot's cross compilers can take a while. Luckily this is only done once.
* Builds are finally reproducible! The [reproduciblebuilds tag](https://github.com/osresearch/heads/issues?q=is%3Aopen+is%3Aissue+milestone%3Areproduciblebuilds) tracks any regressions.
* Currently only tested in QEMU, the Thinkpad x230 and the Chell Chromebook.
* Currently only tested in QEMU, the Thinkpad x230, Librem series and the Chell Chromebook.
** Xen and the TPM do not work in QEMU, so it is only for testing the `initrd` image.
* Building for the Lenovo X220 requires binary blobs to be placed in the blobs/x220/ folder.
See the readme.md file in that folder