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[Xen-devel] [stage1-xen PATCH v1 10/10] BUILDING.md: Add Fedora instructions

Signed-off-by: Rajiv Ranganath <rajiv.ranganath@xxxxxxxxxxx>
 BUILDING.md |   96 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 91 insertions(+), 5 deletions(-)

diff --git a/BUILDING.md b/BUILDING.md
index 3ef5311..946c799 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -1,7 +1,13 @@
 # Build
-stage1-xen requires new Xen and QEMU versions at the time of writing. You are 
unlikely to find them already packaged with your distro. This document 
describes how to build and install the latest Xen and QEMU from scratch. In 
addition, given that CoreOS rkt is also missing from reasonably new distros 
such as Ubuntu Xenial Xerus, I added instructions on how to build that too. The 
document includes the dependencies needed for the build based on Ubuntu Xenial 
+stage1-xen requires new Xen and QEMU versions at the time of writing. You are 
unlikely to find them already packaged with your distro. This document 
describes how to build and install the latest Xen, QEMU and rkt from scratch 
for Ubuntu Xenial Xerus and Fedora. Differently from documentation for Ubuntu, 
the documentation for Fedora uses a Docker container for the build. There is 
also support for building on host on Fedora.
-## Building Xen
+ * [Ubuntu Xenial Xerus](#build_ubuntu)
+ * [Fedora](#build_fedora)
+<a name="build_ubuntu"></a>
+## Ubuntu Xenial Xerus
+### Building Xen
 apt-get install git build-essential python-dev gettext uuid-dev 
libncurses5-dev libyajl-dev libaio-dev pkg-config libglib2.0-dev libssl-dev 
libpixman-1-dev bridge-utils wget libfdt-dev bin86 bcc liblzma-dev iasl 
@@ -17,7 +23,7 @@ reboot
 Make sure to select Xen at boot, or edit /boot/grub/grub.cfg to make it the 
default, changing "set default="0" to point to the appropriate entry below (the 
one booting xen.gz), which could be entry number "4" for example.
-## Building QEMU
+### Building QEMU
 apt-get install libglib2.0-dev libpixman-1-dev libcap-dev libattr1-dev
@@ -54,7 +60,7 @@ make install
 cp i386-softmmu/qemu-system-i386 /usr/lib/xen/bin/
-## Building CoreOS rkt
+### Building CoreOS rkt
 apt-get install golang automake libacl1-dev libsystemd-dev
 ./configure --disable-tpm --with-stage1-flavors=coreos
@@ -62,7 +68,7 @@ make
 cp build-rkt-1.26.0+git/target/bin/rkt /usr/sbin
-## Building stage1-xen
+### Building stage1-xen
 apt-get install busybox-static jq
@@ -72,3 +78,83 @@ export GOPATH=/path/to/gopath
 bash build.sh
 cp stage1-xen.aci /home/username
+<a name="build_fedora"></a>
+## Fedora
+On Fedora there are two ways to build stage1-xen artifacts.
+ * [Container Build](#build_fedora_container_build)
+ * [Manual Build](#build_fedora_manual_build)
+<a name="build_fedora_container_build"></a>
+### Container Build
+We can build stage1-xen artifacts (Xen, QEMU and rkt) automatically in a 
docker container as follows &ndash;
+cd stage1-xen
+docker pull lambdalinuxfedora/stage1-xen-fedora-buildroot
+docker run --rm \
+  -v `pwd`:/root/gopath/src/github.com/rkt/stage1-xen \
+  -v /tmp:/tmp \
+  -t -i lambdalinuxfedora/stage1-xen-fedora-buildroot \
+  /sbin/my_init -- /root/bin/run
+Once `docker run` completes, the build artifact `stage1-xen-build.tar.gz` is 
generated in `/tmp` directory. Please see 
[RUNNING_STAGE1_XEN.md](build/fedora/RUNNING_STAGE1_XEN.md) for details on how 
to setup Fedora for running stage1-xen.
+<a name="build_fedora_manual_build"></a>
+### Manual Build
+It is also possible to manually build stage1-xen components on a Fedora host. 
+Please ensure that you have all the dependencies installed. The dependencies 
for Xen, QEMU, rkt and stage1-xen is documented in 
[buildroot-Dockerfile](build/fedora/buildroot-Dockerfile). You will also need 
to install [`binutils`](https://github.com/lambda-linux-fedora/binutils) 
package that is compiled with `i386pe` support. You can download the pre-built 
RPMs from [here](https://drive.google.com/open?id=0B_tTbuxmuRzIR05wQ3E1eWVyaGs).
+Install `binutils` package.
+tar xvf binutils-2.26.1-1.1.fc25.tar
+dnf install -y 
+You can verify `i386pe` support in `binutils` by doing the following.
+[root@localhost]# ld -V
+GNU ld version 2.26.1-1.1.fc25  Supported emulations:
+   elf_x86_64
+   elf32_x86_64
+   elf_i386
+   elf_iamcu
+   i386linux
+   elf_l1om
+   elf_k1om
+   i386pep
+   i386pe
+You should see the lines `i386pep` and `i386pe` in the output.
+Next you can build Xen, Qemu and rkt using the following scripts &ndash;
+ * [`build/fedora/components/xen`](build/fedora/components/xen)
+ * [`build/fedora/components/qemu`](build/fedora/components/qemu)
+ * [`build/fedora/components/rkt`](build/fedora/components/rkt)
+Please review the scripts and adjust the paths according to your requirements.
+Once the dependencies are installed, you can build stage1-xen
+git clone https://github.com/rkt/stage1-xen.git
+cd stage1-xen
+export GOPATH=/path/to/gopath
+bash build.sh
+cp stage1-xen.aci /home/username
+Please see [RUNNING_STAGE1_XEN.md](build/fedora/RUNNING_STAGE1_XEN.md) for 
details on how to run rkt with stage1-xen.

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