Warning
Iceberg reaches end-of-life on 30th November 2020. If you are running jobs on Iceberg then you need to take urgent action to ensure that your jobs/scripts will run on ShARC or Bessemer. If you have never used ShARC or Bessemer then now is the time to test your scripts. Not all software on Iceberg is available on ShARC/Bessemer.
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 4.4.7
gcc -v
Using built-in specs.
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-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.7 20120313 (Red Hat 4.4.7-11) (GCC)
It is possible to switch to other versions of the gcc compiler suite using modules. After connecting to iceberg (see Establishing a SSH connection), start an interactive sesssion with the qrsh or qsh command. Choose the version of the compiler you wish to use using one of the following commands
module load compilers/gcc/6.2
module load compilers/gcc/5.4
module load compilers/gcc/5.3
module load compilers/gcc/5.2
module load compilers/gcc/4.9.2
module load compilers/gcc/4.8.2
module load compilers/gcc/4.5.3
Alternatively load the most recent available version using
module load compilers/gcc
Confirm that you’ve loaded the version of gcc you wanted using gcc -v.
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?
man pages are available on the system. Once you have loaded the required version of gcc, type
man gcc
These notes are primarily for system administrators
gcc version 6.2 was installed using :
gcc 6.2 modulefile located on the system at /usr/local/modulefiles/compilers/gcc/6.2
gcc version 5.4 was installed using :
gcc 5.4 modulefile located on the system at /usr/local/modulefiles/compilers/gcc/5.4
Installation notes for version 5.3 are not available.
gcc version 5.2 was installed using :
gcc 5.2 modulefile located on the system at /usr/local/modulefiles/compilers/gcc/5.2
gcc version 4.9.2 was installed using :
gcc 4.9.2 modulefile located on the system at /usr/local/modulefiles/compilers/gcc/4.9.2
Installation notes for versions 4.8.2 and below are not available.