[ARMPL] Fix a bug in the installation of GCC required by ARM Performance Library to cover both gcc 9.3 and gcc 11.3. In particular gcc 9.3.0 requires ftp endpoint, whereas gcc 11.3.0 requires http endpoint.

Author: gmarciani

cookbooks/aws-parallelcluster-platform/resources/arm_pl/partial/_arm_pl_common.rb

@@ -127,7 +127,8 @@
         cd gcc-#{gcc_version}
         # Patch the download_prerequisites script to download GCC dependencies from our public bucket.
         # This is required to support build image in isolated environments.
-        sed -i "s#http://gcc\.gnu\.org/pub/gcc/infrastructure##{node['cluster']['artifacts_s3_url']}/dependencies/gcc/prerequisites#g" ./contrib/download_prerequisites
+        # Note: gcc 9.3 uses ftp, whereas gcc 11.3 uses http. 
+        sed -i "s#\\(ftp\\|http\\)://gcc\.gnu\.org/pub/gcc/infrastructure##{node['cluster']['artifacts_s3_url']}/dependencies/gcc/prerequisites#g" ./contrib/download_prerequisites
         ./contrib/download_prerequisites
         mkdir build && cd build
         ../configure --prefix=/opt/arm/armpl/gcc/#{gcc_version} --disable-bootstrap --enable-checking=release --enable-languages=c,c++,fortran --disable-multilib