[PATCH v1] doc/user_manual.md: update ISAR_CROSS_COMPILE variable in SDK part

["srinuvasan.a via isar-users" <isar-users@googlegroups.com>]

From: Srinuvasan A <srinuvasan.a@siemens.com>

With the present documentation the SDK is not generated properly for
foreign architectures, basically SDK_TOOLCAHIN not picking the proper
toolchain due to mode is not properly set for foreign architecture.

Set ISAR_CROSS_COMPILE by 1 in local.conf to get the correct mode for
foreign architecture.

Update the path of scripts instead of relative path for accessing files
from isar directory.

Signed-off-by: Srinuvasan A <srinuvasan.a@siemens.com>
---
 doc/user_manual.md | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/doc/user_manual.md b/doc/user_manual.md
index 575aa114..706c74bf 100644
--- a/doc/user_manual.md
+++ b/doc/user_manual.md
@@ -980,7 +980,7 @@ While isar is building the system, build statistics is collected in
 The collected statistics can be represented visually by using
 `pybootchartgui.py` script (borrowed from OpenEmbedded):
 ```
-../scripts/pybootchartgui/pybootchartgui.py tmp/buildstats/20210911054429/ -f pdf -o ~/buildstats.pdf
+<path-to-isar>/scripts/pybootchartgui/pybootchartgui.py tmp/buildstats/20210911054429/ -f pdf -o ~/buildstats.pdf
 ```
 
 NOTE: `python3-cairo` package is required for `pybootchartgui.py` to work:
@@ -1195,6 +1195,12 @@ One may chroot into the SDK and install required target packages with the help o
 
 ```
 SDK_INCLUDE_ISAR_APT = "1"
+```
+
+ - Set ISAR_CROSS_COMPILE by 1 for foreign architectures
+
+```
+ISAR_CROSS_COMPILE = "1"
 ```
 
  - Trigger creation of SDK root filesystem
@@ -1212,7 +1218,7 @@ sudo tar xf tmp/deploy/images/qemuarm/isar-image-base-sdk-debian-bullseye-qemuar
  - Mount the following directories in chroot by passing resulting rootfs as an argument to the script `mount_chroot.sh`:
 
 ```
-cat ../scripts/mount_chroot.sh
+cat <path-to-isar>/scripts/mount_chroot.sh
 #!/bin/sh
 
 set -e
@@ -1224,7 +1230,7 @@ mount devtmpfs $1/dev     -t devtmpfs -o mode=0755,nosuid
 mount devpts   $1/dev/pts -t devpts   -o gid=5,mode=620
 mount tmpfs    $1/dev/shm -t tmpfs    -o rw,seclabel,nosuid,nodev
 
-sudo ../scripts/mount_chroot.sh tmp/deploy/images/qemuarm/isar-image-base-sdk-debian-bullseye-qemuarm
+sudo <path-to-isar>/scripts/mount_chroot.sh tmp/deploy/images/qemuarm/isar-image-base-sdk-debian-bullseye-qemuarm
 
 ```
 
@@ -1277,7 +1283,7 @@ public nameserver like:
  - Unmount rootfs paths:
 
 ```
-sudo ../scripts/umount_chroot.sh tmp/deploy/images/qemuarm/isar-image-base-sdk-debian-bullseye-qemuarm
+sudo <path-to-isar>/scripts/umount_chroot.sh tmp/deploy/images/qemuarm/isar-image-base-sdk-debian-bullseye-qemuarm
 ```
 
 ## Create a containerized Isar SDK root filesystem
-- 
2.34.1

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