I usually get the "Developer Toolset" from the CentOS SCLO repo:

<https://urldefense.proofpoint.com/v2/url?u=http-3A__mirror.centos.org_centos-2D7_7_sclo_x86-5F64_&d=DwIBaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=ZJXIiTv5j5Ii4VbKCAWc3apPcMn8xC3xxrDAjLmQxDM_oqm8D6SZhkUvGs51HzLQ&s=S0w8ejHJsXnQBefhuY4f0nNsah-C7i1nE84p6Zo-twI&e=  >

Recently, devtoolset-12 SRPMs have appeared under
<https://urldefense.proofpoint.com/v2/url?u=http-3A__ftp.scientificlinux.org_linux_scientific_7x_SRPMS_SL_&d=DwIBaQ&c=gRgGjJ3BkIsb5y6s49QqsA&r=gd8BzeSQcySVxr0gDWSEbN-P-pgDXkdyCtaMqdCgPPdW1cyL5RIpaIYrCn8C5x2A&m=ZJXIiTv5j5Ii4VbKCAWc3apPcMn8xC3xxrDAjLmQxDM_oqm8D6SZhkUvGs51HzLQ&s=OtVPzeR8BE2QVyhuoE_oMTKV0ggS7dhp4t1Nc7OXfQQ&e=  >.

Two questions:

1) What is the relationship (if any) between these Developer Toolset
packages and those from the CentOS repository?

2) Are the RPMs deliberately omitted, or did I miss them?

Thanks!

 - Pat