Can´t install rpm-build needed by SAP Bussines One

Hello everyone,
I´m from a SAP partner and we are installing a SBO 10 for Hana test enviroment. We have no much experience on SLES
When we try to install SBO 10, we get and error that we need rpm-build.
We havé tried to installa rpm-build but has a dependency of gcc
When trying to install gcc we have a dependency from libc-devel but we can´t continue.
Here are screenshots for the output.

Thank you very much.

@Juan_artesap Hi and welcome to the Forum :slight_smile:
Here I see;

zypper se glibc-devel
Reading installed packages...

S | Name               | Summary                                               | Type
  | glibc-devel        | Include Files and Libraries Mandatory for Development | package
  | glibc-devel-32bit  | Include Files and Libraries Mandatory for Development | package
  | glibc-devel-static | C library static libraries for -static linking        | package
  | linux-glibc-devel  | Linux headers for userspace development               | package

zypper if glibc-devel
Information for package glibc-devel:
Repository     : SLE-Module-Basesystem15-SP1-Updates
Name           : glibc-devel
Version        : 2.26-13.51.1

zypper in gcc10
The following 10 NEW packages are going to be installed:
  cpp10 gcc10 glibc-devel libasan6 libatomic1 libitm1 liblsan0 libtsan0 libubsan1 linux-glibc-devel

The following 2 packages are suggested, but will not be installed:
  gcc10-info gcc10-locale

10 new packages to install.

Can you ensure all the update repositories are present?

zypper ref -f
zypper lr -E

Thank you for your response @malcolmlewis
Listing repositories, I´ve seen that I don´t have SLE-Module-Basesystem15-SP1-Updates.
I´ve SLES 15 SP1 and I´ve register the version and I can see it using Yast in Extension and Modules
I added repository with command.
SUSEConnect -p sle-module-basesystem/15.1/x86_64
Now I can see glibc-devel package information
After that, I can install rpm-build
Thank your very much for your help.