Improves documentation

 * Describes better available source tree sharing method (between
xds-agent and xds-server), and which to prefer depending on the
deployment setup.
 * Gives indication about how to pass RSYNC_TARGET and RSYNC_PREFIX
 env vars to the helloworld-native-application build process.
 * Swap chapter order (build before config)

Bug: SPEC-1993

Change-Id: Ie4c22f277a59b0405744d71b0fadff67c5d5d025
Signed-off-by: Sebastien Douheret <sebastien.douheret@iot.bzh>

1 files changed, 6 insertions, 2 deletions

diff --git a/docs/part-1/4-2_build-first-app-cmd.md b/docs/part-1/4-2_build-first-app-cmd.md
index fbfdc41..c878d08 100644
--- a/docs/part-1/4-2_build-first-app-cmd.md
+++ b/docs/part-1/4-2_build-first-app-cmd.md
@@ -63,15 +63,19 @@ You are now ready to use XDS to for example cross build your project.
 Here is an example to build a project based on CMakefile:
 
 ```bash
+# First, grab your target IP address, or it's DNS name
+export TARGET_ADDRESS=<target_adress>
+
 # Go into your project directory and create a build directory
 cd $MY_PROJECT_DIR
 mkdir build
 
 # Generate build system using cmake
-xds-cli exec --id=4021617e --sdkid=c226821b -- "cd build && cmake .."
+# RSYNC_* variables must be set to allow deployment/populate widgets on target (see app-template doc for more info)
+xds-cli exec --id=4021617e --sdkid=c226821b -- "export RSYNC_TARGET=root@${TARGET_ADDRESS} ; export RSYNC_PREFIX=/opt ; cd build && cmake .."
 
 # Build the project
-xds-cli exec --id=4021617e --sdkid=c226821b -- "cd build && make all"
+xds-cli exec --id=4021617e --sdkid=c226821b -- "cd build && make widget"
 ```
 
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