Update build instructions

Change-Id: Icc394a4aa9c84bad77c69d1ebc54f2f2d53371db
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>

1 files changed, 46 insertions, 14 deletions

diff --git a/docs/part-2/2_xds-agent/3_build.md b/docs/part-2/2_xds-agent/3_build.md
index ce1407d..842f582 100644
--- a/docs/part-2/2_xds-agent/3_build.md
+++ b/docs/part-2/2_xds-agent/3_build.md
@@ -9,29 +9,61 @@ Refer to [Prerequisites chapter](../1_Prerequisites.html) for more details.
 
 ## Building
 
-Clone this repo into your `$GOPATH/src/gerrit.automotivelinux.org/gerrit/src/xds` and use delivered Makefile:
+Clone sources under `$ROOTDIR/src/gerrit.automotivelinux.org/gerrit/src/xds/xds-agent`
+in order respect directory hierarchy that match Go package import logic (see
+[How to Write Go Code](https://golang.org/doc/code.html) for more details).
+
+Then use delivered Makefile :
+
+```bash
+# Declare ROOTDIR, can be any location (for example xds-build)
+ROOTDIR=$HOME/xds-build
+
+# Create directory hierarchy that match Go package import logic
+mkdir -p $ROOTDIR/src/gerrit.automotivelinux.org/gerrit/src/xds
+cd $ROOTDIR/src/gerrit.automotivelinux.org/gerrit/src/xds
+
+# Clone sources
+git clone https://gerrit.automotivelinux.org/gerrit/src/xds/xds-agent
+# or git clone ssh://YOUR_USERNAME@gerrit.automotivelinux.org:29418/src/xds/xds-agent
+
+# Build xds-agent
+# (note that GOPATH will correctly be set by Makefile)
+cd xds-agent
+make all
+```
+
+Generate xds-agent packages / tarballs for Linux, MacOS, Windows
 
 ```bash
- mkdir -p $GOPATH/src/gerrit.automotivelinux.org/gerrit/src/xds
- cd $GOPATH/src/gerrit.automotivelinux.org/gerrit/src/xds
- git clone https://gerrit.automotivelinux.org/gerrit/src/xds/xds-agent
- # or git clone ssh://YOUR_USERNAME@gerrit.automotivelinux.org:29418/src/xds/xds-agent
- cd xds-agent
- make all
+make package-all
 ```
 
-And to install xds-agent (by default in `/usr/local/bin`):
+And to install `xds-agent` (by default in `/opt/AGL/xds/agent`):
 
 ```bash
 make install
 ```
 
->**Note:**
->
->Used `DESTDIR` to specify another install directory
->```bash
->make install DESTDIR=$HOME/opt/xds-agent
->```
+<!-- section-warning -->
+**Warning:**
+
+Makefile install rule and default values in configuration file are set
+to fit the docker setup.
+
+So you may need to adapt some settings when you want to install xds-agent natively.
+<!-- end-section-warning -->
+
+<!-- section-note -->
+**Note:**
+
+Used `DESTDIR` to specify another install directory
+
+```bash
+make install DESTDIR=$HOME/opt/xds-agent
+```
+
+<!-- end-section-note -->
 
 ### Cross build