Installing .NET 5 in Amazon Linux 2 for ARM

README.md

Installing .NET 5 in Amazon Linux 2 for ARM64

This is a way to install .NET 5 in your home directory without modifying the system.

At the time of this writing, Amazon Linux 2 for ARM64 almost works already, but there is a problem with the ICU library. I will show this problem and how to fix it.

1. Start Amazon Linux 2 and sign in. (I recommend an m6g.medium instance for this, although smaller ones may work. Bigger ARM instances will definitely work, but cost more per unit time.)

2. Get the .NET 5 tarball. (Unfortunately the URL is kinda long!)

wget https://download.visualstudio.microsoft.com/download/pr/27840e8b-d61c-472d-8e11-c16784d40091/ae9780ccda4499405cf6f0924f6f036a/dotnet-sdk-5.0.100-linux-arm64.tar.gz

3. Uncompress it into its own directory.

mkdir dotnet5
cd dotnet5
tar -xzf ../dotnet-sdk-5.0.100-linux-arm64.tar.gz

4. You can run ./dotnet --version at this time, but you will get this error:

Cannot get symbol ucol_setMaxVariable_50 from libicui18n
Error: /lib64/libicui18n.so.50: undefined symbol: ucol_setMaxVariable_50
Aborted

5. To fix this, you have to download the latest ICU library:

cd
wget https://github.com/unicode-org/icu/releases/download/release-68-1/icu4c-68_1-src.tgz
mkdir icubuild
cd icubuild
tar -xzf ../icu4c-68_1-src.tgz
cd icu/source

6. You need the C++ compiler in order to build the ICU library.

sudo yum install gcc-c++

7. Now you can configure, make, and make install. If you chose an instance type with multiple CPUs, you can speed this part up by passing the -j option to make.

mkdir ~/libicu
./configure --prefix=/home/ec2-user/libicu
make
make install
cd

8. Edit your .bash_profile and add the following (you may want to alter this a little depending on your particular setup):

PATH=$PATH:$HOME/dotnet5
export PATH
DOTNET_ROOT=$HOME/dotnet5
export DOTNET_ROOT
LD_LIBRARY_PATH=$HOME/libicu/lib
export LD_LIBRARY_PATH

9. Here are some optional cleanup steps:

rm dotnet-sdk-5.0.100-linux-arm64.tar.gz
rm icu4c-68_1-src.tgz
rm -rf icubuild

10. Log out and log in again. You should be able to run dotnet --version and it should work. You should also be able to play with the F# interpreter, if you want, with dotnet --fsi. (Use exit 0 ;; to exit F#.)

It worked, thank you.

Worked for me as well. Didn't have to log out.
Thank you!

Thank you very much for sharing the detailed steps
I have installed libicu60 package to solve the "Error: /lib64/libicui18n.so.50: undefined symbol: ucol_setMaxVariable_50"

sudo yum install libicu60
dotnet --version
5.0.400

👋 Question

So, I just executed the steps above until step 7 and got an issue trying to configure the ICU library, I guess I would need some help to figure out what's preventing the configure script to run fine

~/icubuild/icu/source > **./configure --prefix=/home/ec2-user/libicu**
checking for ICU version numbers... release 68.1, library 68.1, unicode version 13.0
checking build system type... aarch64-unknown-linux-gnu
checking host system type... aarch64-unknown-linux-gnu
...

checking for nl_langinfo's argument to obtain the codeset... CODESET
checking for namespace support... no
**configure: error: Namespace support is required to build ICU.**

After this point, I can't run the make command obviously, Do you mind giving me a few hints on what could I try?

thx!

Never mind, I believe my scenario is different than yours, I am using Centos 7 ARM64

http://isoredirect.centos.org/altarch/7/isos/aarch64/

Linux centospi 5.4.72-v8.1.el7 #1 SMP PREEMPT Wed Oct 21 17:35:36 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux

Thanks for this!

Thank you very much for sharing the detailed steps I have installed libicu60 package to solve the "Error: /lib64/libicui18n.so.50: undefined symbol: ucol_setMaxVariable_50"

sudo yum install libicu60
dotnet --version
5.0.400

This worked for me as well. Thanks!