Examples not working?

Software Collections (SCL) #

[Software Collections (SCL)] provides software versions that are […] more recent > than their equivalent versions included in the base Rocky 8 distribution.

Available SCLs and their Packages #

To list all Software Collections installed on the development nodes, use:

[alice@dev2 ~]$ scl list-collections
gcc-toolset-10
gcc-toolset-11
gcc-toolset-12
gcc-toolset-13
gcc-toolset-9

Importantly, the above SCLs are available only on the development nodes.

To list all the packages that are part of one or more of these SCLs, use:

[alice@dev2 ~]$ scl list-packages gcc-toolset-11
gcc-toolset-11-toolchain-11.1-1.el8.x86_64
gcc-toolset-11-gdb-10.2-5.el8.x86_64
gcc-toolset-11-dwz-0.14-2.el8.x86_64
gcc-toolset-11-gcc-gfortran-11.2.1-9.2.el8_9.x86_64
gcc-toolset-11-runtime-11.1-1.el8.x86_64
gcc-toolset-11-valgrind-1:3.17.0-6.el8.x86_64
gcc-toolset-11-systemtap-runtime-4.5-6.el8.x86_64
gcc-toolset-11-libquadmath-devel-11.2.1-9.2.el8_9.x86_64
gcc-toolset-11-elfutils-0.185-5.el8.x86_64
gcc-toolset-11-libstdc++-devel-11.2.1-9.2.el8_9.x86_64
gcc-toolset-11-gcc-11.2.1-9.2.el8_9.x86_64
gcc-toolset-11-gcc-c++-11.2.1-9.2.el8_9.x86_64
gcc-toolset-11-11.1-1.el8.x86_64
gcc-toolset-11-elfutils-libelf-0.185-5.el8.x86_64
gcc-toolset-11-strace-5.13-7.el8.x86_64
gcc-toolset-11-systemtap-client-4.5-6.el8.x86_64
gcc-toolset-11-binutils-2.36.1-4.el8_9.x86_64
gcc-toolset-11-make-1:4.3-2.el8.x86_64
gcc-toolset-11-systemtap-4.5-6.el8.x86_64
gcc-toolset-11-systemtap-devel-4.5-6.el8.x86_64
gcc-toolset-11-elfutils-libs-0.185-5.el8.x86_64
gcc-toolset-11-perftools-11.1-1.el8.x86_64
gcc-toolset-11-elfutils-debuginfod-client-0.185-5.el8.x86_64
gcc-toolset-11-annobin-docs-10.23-1.el8.noarch
gcc-toolset-11-ltrace-0.7.91-1.el8.x86_64
gcc-toolset-11-gcc-gdb-plugin-11.2.1-9.2.el8_9.x86_64

Using SCLs #

Rocky 8 comes with GCC 8.5.0 (2021-05-14). Never versions are available via the gcc-toolset-NN SCLs. Here is an example how to check the version of one of the newer version:

[alice@dev2 ~]$ scl enable gcc-toolset-12 "gcc --version"
gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-7)
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Importantly, this approach of prefixing the original command call works also in job scripts.

Using SCLs in interactive mode #

Using scl enable (traditional) #

If you work interactively on one of the development nodes, you can also launch a new shell (typically Bash) with one or more SCLs enabled:

[alice@dev2 ~]$ scl enable gcc-toolset-12 "$SHELL"
[alice@dev2 ~]$ gcc --version
gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-7)
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

To “unload” an SCLs, just return to the previous shell by exiting new SCL-enabled shell, i.e.

[alice@dev2 ~]$ exit

[alice@dev2 ~]$

An alternative approach to using scl enable for activating an SCL, is to module load to achieve the same, e.g.

[alice@dev2 ~]$ module load CBI scl-gcc-toolset/12
[alice@dev2 ~]$ gcc --version
gcc (GCC) 12.2.1 20221121 (Red Hat 12.2.1-7)
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

To go back to the built-in version of GCC, unload the module, i.e.

[alice@dev2 ~]$ module unload CBI scl-gcc-toolset/12
[alice@dev2 ~]$ gcc --version
gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-22)
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See Also #