doc: update arm64 cross build tool version

[ upstream commit 2bf752c ]

Update the cross build tool version to gcc8.3.

Fixes: 01add9d ("doc: add cross compiling guide")

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Gavin Hu <gavin.hu@arm.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>

doc/guides/linux_gsg/cross_build_dpdk_for_arm64.rst

@@ -16,19 +16,21 @@ Obtain the cross tool chain
 The latest cross compile tool chain can be downloaded from:
 https://developer.arm.com/open-source/gnu-toolchain/gnu-a/downloads.
 
-Following is the step to get the version 8.2, latest one at the time of this writing.
+It is always recommended to check and get the latest compiler tool from the page and use
+it to generate better code. As of this writing 8.3-2019.03 is the newest, the following
+description is an example of this version.
 
 .. code-block:: console
 
-   wget https://developer.arm.com/-/media/Files/downloads/gnu-a/8.2-2019.01/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu.tar.xz
+   wget https://developer.arm.com/-/media/Files/downloads/gnu-a/8.3-2019.03/binrel/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu.tar.xz
 
 Unzip and add into the PATH
 ---------------------------
 
 .. code-block:: console
 
-   tar -xvf gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu.tar.xz
-   export PATH=$PATH:<cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/bin
+   tar -xvf gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu.tar.xz
+   export PATH=$PATH:<cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/bin
 
 .. note::
 
@@ -69,9 +71,9 @@ Copy the NUMA header files and lib to the cross compiler's directories:
 
 .. code-block:: console
 
-   cp <numa_install_dir>/include/numa*.h <cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/bin/../aarch64-linux-gnu/libc/usr/include/
-   cp <numa_install_dir>/lib/libnuma.a <cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.2/
-   cp <numa_install_dir>/lib/libnuma.so <cross_install_dir>/gcc-arm-8.2-2019.01-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.2/
+   cp <numa_install_dir>/include/numa*.h <cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/aarch64-linux-gnu/libc/usr/include/
+   cp <numa_install_dir>/lib/libnuma.a <cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.3.0/
+   cp <numa_install_dir>/lib/libnuma.so <cross_install_dir>/gcc-arm-8.3-2019.03-x86_64-aarch64-linux-gnu/lib/gcc/aarch64-linux-gnu/8.3.0/
 
 .. _configure_and_cross_compile_dpdk_build: