# Compilers The HPC supports four *programming environment (PE)* modules to easily switch between compilers. Each programming environment contains the full set of compatible compilers and libraries.\ These compilers are: [GNU Collection Compiler (GCC)](https://gcc.gnu.org), the [Intel compiler](https://software.intel.com/en-us/intel-compilers), [The Portland Group (PGI)](https://www.pgroup.com), and the [Numerical Algorithms Group (NAG)](https://www.nag.com/nag-compiler). 📝 **Note:** You cannot use more than one `PE-module` at the same time. For example, if you are working with GNU and then you decide to work with the Intel compiler, first unload the `PE-gnu` module and then load `PE-intel`. ## The GNU Compiler Suite To load the GNU module: ```bash module load PE-gnu ``` You can check which modules are loaded in your system by typing: ```bash $ module list Currently Loaded Modulefiles: 1) gcc/5.3.0 2) openmpi/1.10.3 3) xalt/0.7.5 4) PE-gnu/1.0 ``` To display information about the module, such as the size, the compiler, or the source from which the module was created, etc., use the following command: ```bash $ module display PE-gnu ------------------------------------------------------------------- /software/dev_tools/swtree/cs400/modulefiles/PE-gnu/1.0: module-whatis PE-gnu defines the environment needed to build applications using GNU compiler suites on this system. conflict PE-gnu PE-intel PE-pgi setenv PE_NAME GNU setenv PE_CC mpicc setenv PE_CXX mpic++ setenv PE_FORTRAN mpif90 prepend-path PATH /software/dev_tools/swtree/cs400_centos7.2_pe2016-08/PE/1.0/noarch/bin module load xalt ------------------------------------------------------------------- ``` You can switch between the two versions of PE-gnu v1.0 and PE-gnu v2.0: ```bash $ module switch PE-gnu/1.0 PE-gnu/2.0 $ module list Currently Loaded Modulefiles: 1) gcc/5.3.0 2) openmpi/2.1.1 3) PE-gnu/2.0 4) xalt/0.7.5 ``` ## The Intel Compiler Suite If you are working with another module, first you need to unload it. ```bash module load PE-intel ``` You can see what the module provides with the commands `module list` and `module display`. ```bash $ module list Currently Loaded Modulefiles: 1) intel/16.0.1 2) openmpi/1.10.3 3) xalt/0.7.5 4) PE-intel/1.0 ``` ```bash module display PE-intel ------------------------------------------------------------------- /software/dev_tools/swtree/cs400/modulefiles/PE-intel/1.0: module-whatis PE-intel defines the environment needed to build applications using Intel compiler suites on this system. conflict PE-gnu PE-intel PE-pgi setenv PE_NAME INTEL setenv PE_CC mpicc setenv PE_CXX mpic++ setenv PE_FORTRAN mpif90 prepend-path PATH /software/dev_tools/swtree/cs400_centos7.2_pe2016-08/PE/1.0/noarch/bin module load xalt ------------------------------------------------------------------- ``` ## The Portland Group Compiler Suite If you are working with another module, first you need to unload it. ```bash module load PE-pgi ``` You can see what does the module provides with the commands `module list` and `module display`. ```bash $ module list Currently Loaded Modulefiles: 1) pgi/15.7.0 2) openmpi/1.10.3 3) xalt/0.7.5 4) PE-pgi/1.0 ``` ```bash $ module display PE-pgi ------------------------------------------------------------------- /software/dev_tools/swtree/cs400/modulefiles/PE-pgi/1.0: module-whatis PE-pgi defines the environment needed to build applications using PGI compiler suites on this system. conflict PE-gnu PE-intel PE-pgi setenv PE_NAME PGI setenv PE_CC mpicc setenv PE_CXX mpic++ setenv PE_FORTRAN mpif90 prepend-path PATH /software/dev_tools/swtree/cs400_centos7.2_pe2016-08/PE/1.0/noarch/bin module load xalt ------------------------------------------------------------------- ``` ## The Numerical Algorithm Group Compiler Suite If you are working with another module, first you need to unload it. ```bash module load PE-nag ``` You can see what the module provides with the commands `module list` and `module display`. ```bash $ module list Currently Loaded Modulefiles: 1) nag/6.0 2) mpich/3.2 3) xalt/0.7.5 4) PE-nag/1.0 ``` ```bash $ module display PE-nag ------------------------------------------------------------------- /software/dev_tools/swtree/cs400/modulefiles/PE-nag/1.0: module-whatis PE-nag defines the environment needed to build applications using NAG Fortran compiler on this system. conflict PE-gnu PE-intel PE-pgi setenv PE_NAME NAG setenv PE_CC mpicc setenv PE_CXX mpic++ setenv PE_FORTRAN mpif90 prepend-path PATH /software/dev_tools/swtree/cs400_centos7.2_pe2016-08/PE/1.0/noarch/bin module load xalt ------------------------------------------------------------------- ``` ### Related Information * [Environment Customization](https://github.com/Doane-CCLA/docs/tree/077d0b5ac811c897a227571f79ddbeac57fcb125/using-the-hpc/how-to-use/condos/software/environment.md) * [Modules](https://github.com/Doane-CCLA/docs/tree/077d0b5ac811c897a227571f79ddbeac57fcb125/using-the-hpc/how-to-use/condos/software/modules.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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