GNU Compiler 2016

The GNU Compilers are available as module and as part of the operating system. To see the other available versions of the GNU Compilers type

 [abcd1234@hpcl001]$ module av gcc

which currently shows

---------------- /cm/local/modulefiles ----------------
  gcc/6.1.0
---------- /cm/shared/uniol/modules/compiler ----------
  GCC/4.9.4-2.25    GCC/5.4.0-2.26    GCC/6.2.0-2.27 (D)

To load the module of your choice type e.g.

 [abcd1234@hpcl001]$ module load gcc/4.9.4-2.25
 [abcd1234@hpcl001]$ module list
 [abcd1234@hpcl001]$ 

The commands for the available languages are:

Name	Description
gcc	C compiler
g++	C++ compiler
gfortran	Fortran compiler

Advantages

• high availability, open source (free)
• new standards implemented
• fast compilation
• performance of resulting C++ usually good
• most open source software tested with GNU

Disadvantages

• optimization of code is moderate: performance of C, Fortran code can be moderate