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--- guide:compiling [2011/02/17 16:46]
swyngaard
+++ guide:compiling [2021/12/09 16:42] (current)
@@ Line 1: / Line 1: @@
 ======Compiling======
 =====Compilers=====
-The following is a list of C, C++ and Fortran compilers available on the SUN cluster and the M9000:
+The following is a list of C, C++ and Fortran compilers available on the CHPC cluster:
-====Sun Studio====
+====Intel====
-  * cc
+  * ''icc'' (for C and C++)
-  * CC
+  * ''ifort''
-  * f90/f95
+====GNU Compiler Collection====
-====GNU====
+  * ''gcc''
-  * gcc
+  * ''g++''
-  * g++
+  * ''gfortran''
-  * gfortran
 =====Environment=====
 ====module Command====
 The module command provides a convenient mechanism for managing which environment variables are set in your shell session. The following is a list of the basic usage of the module command:
-  * <code>module avail</code> Check which modules are available
+  * Check which modules are available <code>module avail</code>
-  * <code>module add <module></code> Add a module to the current environment
+  * Add a module to the current environment <code>module add <module></code>
-  * <code>module remove <module></code> Remove a module from the environment
+  * Show loaded modules <code>module list</code>
+  * Remove a module from the environment <code>module remove <module></code> or <code>module rm <module></code>
 =====Compiling=====
@@ Line 28: / Line 29: @@
     printf("Hello World");
     return 0;
+}
+</code>
+===C with MPI===
+<code c>
+#include <stdlib.h>
+#include <stdio.h>
+#include <mpi.h>
+int
+main(argc, argv)
+int                     argc;
+char                    *argv[];
+{
+        int             rank, size, len;
+        char            name[MPI_MAX_PROCESSOR_NAME];
+        MPI_Init(&argc, &argv);
+        MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+        MPI_Comm_size(MPI_COMM_WORLD, &size);
+        MPI_Get_processor_name(name, &len);
+        printf ("Hello world! I'm %d of %d on %s\n", rank, size, name);
+        MPI_Finalize();
+        exit(0);
 }
 </code>
@@ Line 36: / Line 64: @@
 END PROGRAM Hello
 </code>
-====Sun Studio====
+====GNU====
-The following code snippets demonstrate how to compile the above code examples use the Sun Studio compiler suite:
+The following code snippets demonstrate how to compile the above code examples use the GNU compiler suite:
 ===C===
-<code>$> cc -fast -o hello hello.c</code>
+<code>gcc -o hello hello.c</code>
+===C with MPI===
+<code>mpicc -o hello hello.c</code>
 ===Fortran===
-<code>$> f90 -fast -o hello hello.f90</code>
+<code>gfortran -o hello hello.f90</code>
-====GNU====
+=====OpenMP=====
+The above compilers include support for OpenMP.  To compile an OpenMP code add the ''-fopenmp'' option.  For example:
+<code>gcc -o mp_hello -fopenmp mp_hello.c</code>
+code from https://computing.llnl.gov/tutorials/openMP/samples/C/omp_hello.c
+====Intel Compilers====
+The following code snippets demonstrate how to compile OpenMP examples with the Intel compilers:
 ===C===
-<code>$> gcc -o hello hello.c</code>
+<code>icc -openmp omp_hello.c -o hello</code>
 ===Fortran===
-<code>$> gfortran -o hello hello.f90</code>
+<code>ifort -openmp omp_hello.f -o hello</code>
+===Java===
+An example of compiling and executing a simple Java program:
+====MyFirstJavaProgram.java====
+<code>
+public class MyFirstJavaProgram {
+  public static void main(String []args) {
+    System.out.println("Hello World"); // prints Hello World
+  }
+}
+</code>
+To compile this, make sure you have the java module loaded, then:
+<code>
+javac MyFirstJavaProgram.java</code>
+A bytecode-compiled file should be created, named MyFirstJavaProgram.class
+To execute it, run as follows:
+<code>
+java MyFirstJavaProgram
+</code>
+=====MPI=====
+MPI (Message Passing Interface -- [[http://www.open-mpi.org]]) is provided using the OpenMPI libraries.  To compile MPI code use the ''mpicc'' or ''mpif90'' compilers.
+To run an MPI job see the man pages for PBS Pro. On the login node, type "man qsub". To obtain an interactive node,
+use ''qsub -I'' The login node prevents long-running processes therefore an interactive node is useful for compilations and builds. To test your code, load the module you want to use first, and then compile your code with it:
+''$mpicc -o bin/test src/hello_world.c''
+To test it:
+<code>mpirun -np 8 bin/test</code>
+You should see something similar to:
+<code>
+Hello world! I'm 7 of 8 on cnode-2-6
+Hello world! I'm 6 of 8 on cnode-2-6
+Hello world! I'm 5 of 8 on cnode-2-6
+Hello world! I'm 1 of 8 on cnode-2-6
+Hello world! I'm 0 of 8 on cnode-2-6
+Hello world! I'm 3 of 8 on cnode-2-6
+Hello world! I'm 2 of 8 on cnode-2-6
+Hello world! I'm 4 of 8 on cnode-2-6
+</code>

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