Update build and test in readme file (#4550)

* Update build and test in readme file

There are some modifications after build and test processes are updated.
This commit will add those information.

Signed-off-by: Seok NamKoong <sk.namkoong@samsung.com>

* remove some tag and sentence

1 files changed, 26 insertions, 16 deletions

diff --git a/docs/howto/CrossBuildForArm.md b/docs/howto/CrossBuildForArm.md
index e307596d0..67d1eca3d 100644
--- a/docs/howto/CrossBuildForArm.md
+++ b/docs/howto/CrossBuildForArm.md
@@ -23,7 +23,7 @@ To see the options,
 
 RootFS will be prepared at `tools/cross/rootfs/arm` folder.
 
-## Prepare RootFS at alternative folder
+### Prepare RootFS at alternative folder
 
 Use `ROOTFS_DIR` to a full path to prepare at alternative path.
 
@@ -31,7 +31,7 @@ Use `ROOTFS_DIR` to a full path to prepare at alternative path.
 ROOTFS_DIR=/home/user/rootfs/arm-xenial sudo ./tools/cross/build_rootfs.sh arm
 ```
 
-## Using proxy
+### Using proxy
 
 If you need to use proxy server while building the rootfs, use `--setproxy` option.
 
@@ -49,7 +49,7 @@ for `http`, `https` and `ftp` protocol.
 
 We recommend you have g++ >= 6 installed on your system because NN generated tests require it.
 
-On Ubuntu 16.04 or older, follow the next steps:
+- On Ubuntu 16.04 or older, follow the next steps:
 
 ```
 cd ~/your/path
@@ -58,7 +58,7 @@ tar xvf gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf.tar.xz
 echo 'PATH=~/your/path/gcc-linaro-7.2.1-2017.11-x86_64_arm-linux-gnueabihf/bin:$PATH' >> ~/.bashrc
 ```
 
-On Ubuntu 18.04 LTS, you can install using `apt-get`.
+- On Ubuntu 18.04 LTS, you can install using `apt-get`.
 Choose g++ version whatever you prefer: 6, 7 or 8.
 
 ```
@@ -78,30 +78,40 @@ Then, copy `libstdc++.so.6.0.24` into `/usr/lib/arm-linux-gnueabihf`, and update
 
 ## Build and install ARM Compute Library
 
-```
-CROSS_BUILD=1 TARGET_ARCH=armv7l make acl
-```
-Mostly you only need once of ACL build. This will build and install to `Product/(target_arch-os)/out/bin` folder.
-- this is required for ARM on Ubuntu
+Mostly you only need once of ACL build.
 
-## Build nnfw
+ACL will be automatically installed in `externals/acl` when you build nnfw without any changes.
 
-Give `TARGET_ARCH` variable to set the target architecture
+You can check ACL source information in `cmake/packages/ARMComputeSourceConfig.cmake`
 
-```
-CROSS_BUILD=1 TARGET_ARCH=armv7l make all install
-```
-- supports `armv7l` and `aarch64` for now
+## Build nnfw
+
+Give `TARGET_ARCH` variable to set the target architecture.
 
 If you used `ROOTFS_DIR` to prepare in alternative folder, you should also give this to makefile.
 
 ```
+CROSS_BUILD=1 TARGET_ARCH=armv7l make all install
+
+# If ROOTFS_DIR is in alternative folder
 ROOTFS_DIR=ROOTFS_ARM=/path/to/your/rootfs/arm \
 CROSS_BUILD=1 TARGET_ARCH=armv7l make all install
 ```
 
-## Run test
+If you want to build neurun, you should switch on `BUILD_NEURUN` option in `cmake/CfgOptionFlags.cmake`
+```
+option(BUILD_NEURUN "Build neurun" ON)
+```
 
+## Run test
+- PureACL
 ```
  ./tests/scripts/test_driver.sh --artifactpath=.
 ```
+
+- neurun
+```
+ ./tests/scripts/test_driver.sh --artifactpath=. \
+ --ldlibrarypath=Product/out/lib/neurun:Product/out/lib \
+ --frameworktest_list_file=tests/scripts/neurun_frameworktest_list.armv7l.acl_cl.txt
+```