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SDSC > User Support > Compute and Data Resource Guides > Trestles User Guide > Compiling

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Trestles User Guide: Compiling

Trestles provides the Portland Group (PGI), Intel, and GNU compilers. MPI implementations provided are mvapich2 and openMPI. The majority of libraries are compiled for PGI and mvapich2 support, which have been shown to give optimal performance on the system. As such, they are loaded by default in the login shell. Intel and GNU compilers should only be used for compatibility if necessary. Similarly mvapich2 should be used over OpenMPI whenever possible.

Using the PGI Compilers

The PGI compilers should be loaded automatically in your environment; however, if you've modified your %7e/.bashrc or ~/.cshrc you can reload the PGI compilers via:

[user@trestles ~]$ cat .bashrc 
...
module load pgi mvapich2

And source the environment:

[user@trestles ~]$ source ~/.bashrc

	Serial	MPI	OpenMP
Fortran	pgf90	mpif90	pgf90 -mp
C	pgcc	mpicc	pgcc -mp
C++	pgCC	mpicxx	pgCC -mp

 

Using the Intel Compilers

The Intel compilers can be loaded by modifying your %7e/.bashrc or ~/.cshrc to include the line:

[user@trestles ~]$ cat .bashrc 
...
module purge
module load intel mvapich2

And source the environment:

[user@trestles ~]$ source ~/.bashrc

	Serial	MPI	OpenMP
Fortran	ifort	mpif90	ifort -openmp
C	icc	mpicc	icc -openmp
C++	icpc	mpicxx	icpc -openmp

Note for C/C++ users: compiler warning - feupdateenv is not implemented and will always fail. For most users, this error can safely be ignored. By default, the Intel C/C++ compilers only link against Intel's optimized version of the C standard math library (libmf). The error stems from the fact that several of the newer C99 library functions related to floating point rounding and exception handling have not been implemented.

Using the GNU Compilers

The GNU compilers can be loaded by modifying your %7e/.bashrc or ~/.cshrc to include the line:

[user@trestles ~]$ cat .bashrc 
...
module purge
module load gnu openmpi

And source the environment:

[user@trestles ~]$ source ~/.bashrc

	Serial	MPI	OpenMP
Fortran	gfortran	mpif90	gfortran -fopenmp
C	gcc	mpicc	gcc -fopenmp
C++	g++	mpicxx	g++ -fopenmp