[PATCH 3/3] sdk: Provide README inside sdkchroot

["Maxim Yu. Osipov" <mosipov@ilbers.de>]

Suggested-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by:  Maxim Yu. Osipov <mosipov@ilbers.de>
---
 meta/recipes-devtools/sdkchroot/files/README.sdk | 42 ++++++++++++++++++++++++
 meta/recipes-devtools/sdkchroot/sdkchroot.bb     |  5 ++-
 2 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-devtools/sdkchroot/files/README.sdk

diff --git a/meta/recipes-devtools/sdkchroot/files/README.sdk b/meta/recipes-devtools/sdkchroot/files/README.sdk
new file mode 100644
index 0000000..9c1af6d
--- /dev/null
+++ b/meta/recipes-devtools/sdkchroot/files/README.sdk
@@ -0,0 +1,42 @@
+Building applications for targets in ISAR takes a lot of time as they are built under QEMU.
+SDK helps to develop applications for target platform in crossbuild environment.
+
+SDK contains cross-toolchain for target architecture and a copy of isar-apt repo with
+locally prebuilt target debian packages.
+
+ - First one have to mount the system directories for proper operation in chroot environement.
+Just call supplied with sdk tarball  in  udo rootfs as an argument to the script `mount_chroot.sh`:
+
+$ sudo mount_chroot.sh  <sdk_rootfs>
+
+ - chroot to isar SDK rootfs:
+
+$ sudo chroot <sdk_rootfs>
+
+ - Check that cross toolchains are installed
+
+:~# dpkg -l | grep crossbuild-essential-armhf
+ii  crossbuild-essential-armhf           12.3                   all          Informational list of cross-build-essential packages
+
+ - Install needed prebuilt target packages.
+
+:~# apt-get update
+:~# apt-get install libhello-dev:armhf
+
+ - Check the contents of the installed target package
+
+:~# dpkg -L libhello-dev
+/.
+/usr
+/usr/include
+/usr/include/hello.h
+/usr/lib
+/usr/lib/arm-linux-gnueabihf
+/usr/lib/arm-linux-gnueabihf/libhello.a
+/usr/lib/arm-linux-gnueabihf/libhello.la
+/usr/share
+/usr/share/doc
+/usr/share/doc/libhello-dev
+/usr/share/doc/libhello-dev/changelog.gz
+/usr/share/doc/libhello-dev/copyright
+~#
diff --git a/meta/recipes-devtools/sdkchroot/sdkchroot.bb b/meta/recipes-devtools/sdkchroot/sdkchroot.bb
index f6b9cce..895a454 100644
--- a/meta/recipes-devtools/sdkchroot/sdkchroot.bb
+++ b/meta/recipes-devtools/sdkchroot/sdkchroot.bb
@@ -8,7 +8,9 @@ DESCRIPTION = "Isar SDK Root filesystem"
 LICENSE = "gpl-2.0"
 LIC_FILES_CHKSUM = "file://${LAYERDIR_core}/licenses/COPYING.GPLv2;md5=751419260aa954499f7abaabaa882bbe"
 
-SRC_URI = "file://configscript.sh"
+SRC_URI = " \
+    file://configscript.sh \
+    file://README.sdk"
 PV = "0.1"
 
 inherit isar-bootstrap-helper
@@ -51,6 +53,7 @@ do_build() {
     setup_root_file_system --copyisarapt --host-arch --host-distro "${S}" $packages
 
     # Configure root filesystem
+    sudo install -m 644 ${WORKDIR}/README.sdk ${S}
     sudo install -m 755 ${WORKDIR}/configscript.sh ${S}
     sudo chroot ${S} /configscript.sh  ${DISTRO_ARCH}
 }
-- 
2.11.0