Attention

WARNING: From 9am on 19th August until 5pm on 2nd September there will be no access to the Stanage HPC cluster.

We will send an email to notify you when Stanage is back online and available for job submission.

Attention

The ShARC HPC cluster was decommissioned on the 30th of November 2023 at 17:00. It is no longer possible for users to access that cluster.

GNU Compiler Collection (gcc)

The GNU Compiler Collection (gcc) is a widely used, free collection of compilers including C (gcc), C++ (g++) and Fortran (gfortran). The defaut version of gcc on the system is 4.8.5

$ gcc -v

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/4.8.5/lto-wrapper
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto --enable-plugin --enable-initfini-array --disable-libgcj --with-isl=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/isl-install --with-cloog=/builddir/build/BUILD/gcc-4.8.5-20150702/obj-x86_64-redhat-linux/cloog-install --enable-gnu-indirect-function --with-tune=generic --with-arch_32=x86-64 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.8.5 20150623 (Red Hat 4.8.5-4) (GCC)

It is possible to switch to other versions of the gcc compiler suite using modules. After connecting to ShARC (see Establishing a SSH connection), start an interactive sesssion with the qrshx command. Choose the version of the compiler you wish to use using one of the following commands

module load dev/gcc/8.2
module load dev/gcc/6.3
module load dev/gcc/6.2
module load dev/gcc/5.4

Confirm that you’ve loaded the version of gcc you wanted using gcc -v.

Language support

• Which version(s) of GCC support which features of the C99 and C11 standards?

• Which version(s) of GCC support which features of the C++98, C++11, C++14 and C++17 standards?

Documentation

man pages are available on the system. Once you have loaded the required version of gcc, type

man gcc

• What’s new in the gcc version 8 series?

• What’s new in the gcc version 6 series?

• What’s new in the gcc version 5 series?

Installation Notes

These notes are primarily for system administrators:

Version 8.2

• Installation script

• gcc 8.2 modulefile saved as /usr/local/modulefiles/dev/gcc/8.2

Version 6.3

• Installation script

• gcc 6.3 modulefile saved as /usr/local/modulefiles/dev/gcc/6.3

Version 6.2

• Installation script

• gcc 6.2 modulefile saved as /usr/local/modulefiles/dev/gcc/6.2

Version 5.4

• Installation script

• this modulefile, saved as /usr/local/modulefiles/dev/gcc/5.4

Version 4.9.4

• this script

• this modulefile, saved as /usr/local/modulefiles/dev/gcc/4.9.4