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| <head> |
| <title>Building an MPI program with Managed Build</title> |
| </head> |
| <body> |
| <h1>Building an MPI program with Managed Build</h1> |
| <p>Topics include: |
| <ul> |
| <li><a href="#create">Creating an MPI project </a>(same as for C but worth describing) |
| |
| <li><a href="#include">include paths</a> |
| <li><a href="#mpicc">specifying the mpicc toolchain</a> |
| <li><a href="#launch">launching an MPI program </a> locally using 'External Tools...' |
| (by specifying the mpirun command)? |
| </ul> |
| |
| |
| |
| <h2 id="create">Create an MPI Project</h2> |
| <p>To create a new MPI project in C using the managed build facility, |
| Select File -> New -> Project ... The New Project dialog opens. |
| <br>Select C -> Managed Make C Project. |
| <p><b>Note: </b> for automatic setup of MPI project information, |
| see the PTP PLDT (Parallel Language Development Tools) help. |
| |
| <br><img src="images/newProject.gif"> |
| <br>Click Next. |
| <br>Type the name of your project, e.g. MyCProject |
| <br><img src="images/newProject2.gif"> |
| <br>Click Finish. |
| <p>A dialog prompts you to switch to the C/C++ Perspective. Hit OK. |
| The C/C++ Perspective appears. |
| <p>Your new project is shown in the C/C++ Projects view. |
| <br><img src="images/cPersp.gif"> |
| <p>Now create a source file. |
| Click File -> New -> Source File. |
| <br>Type a name for the source file, e.g. "test.c" |
| <br><img src="images/newSourceFile.gif"> |
| <br>Click Finish. |
| <p>A new editor appears, in which you can enter your program. |
| <br><img src="images/newEditor.gif"> |
| <p>Since this is a managed build project, Eclipse creates a makefile |
| and tries to build with the new file. Since the file is empty, |
| you will see errors in the Problems view, and in the Console view. |
| <br><img src="images/newFileErrors.gif"> |
| <p>Enter a program in the editor. |
| (If you have the PTP PLDT installed, a sample program is available |
| in the PTP MPI tools help, available as: |
| <a href="../../org.eclipse.ptp.pldt.help/html/testMPI.c">testMPI.c</a>) |
| <!-- TODO I don't think that relative URL will work in installed plug-in --> |
| <p>A sample "hello world" type MPI program is also a good |
| first test program: |
| <pre> |
| #include <stdio.h> |
| #include <mpi.h> |
| int main(int argc, char *argv[]) { |
| int rank; |
| MPI_Init(&argc, &argv); |
| MPI_Comm_rank(MPI_COMM_WORLD, &rank); |
| printf(my rank=%d\n, rank); |
| MPI_Finalize(); |
| return 0; |
| } |
| |
| </pre> |
| <p>Save your program. The program will be compiled automatically by |
| the managed build system. |
| <p>You may see several errors, if you haven't set up the |
| MPI information for your project. |
| The first error may be that an include file isn't found. |
| <br><img src="images/errorInclude.gif"> |
| <br>(If you hover the mouse cursor over the red "X" |
| you will see the reason for the error) |
| <h2 id="include">Include Paths</h2> |
| <p>In order to locate needed include files, bring up the Project Properties on this C/C++ project. |
| |
| <br>To bring up the Project Properties dialog, |
| activate the context menu on the Project, and select "Properties." |
| <br><img src="images/projProps.gif"> |
| <p> |
| The project properties window is displayed for this C project. |
| Select "C/C++ Build" on the left, and under "Configuration settings" |
| on the "Tool Settings" tab, select "Directories" under "GCC Compiler." |
| This lists the Include paths used to build the project, which are now |
| empty. |
| |
| <br><img src="images/propsBuild.gif"> |
| <p>To add an include path, click the add button for Include Paths. |
| <br><img src="images/includePathsAdd.gif"> |
| <p>Then enter or browse to find the location of the MPI includes, and |
| select "OK." |
| <br><img src="images/includePathsAddDlg.gif"> |
| <p>Now you also need to add the path to the library: Under GCC Linker, |
| Libraries, select the add button for "Libraries (-l)" |
| |
| <br><img src="images/projPropsLnkLib.gif"> |
| <p>For the library value, enter 'mpi' and select 'OK' |
| <br><img src="images/linkerDlg.gif"> |
| <p>Then select the add button for "Library Search Path (-L)" |
| and enter the path to the lib directory. Select 'OK' |
| <br><img src="images/libDlg.gif"> |
| <p>Now select "OK" in the project properties dialog to close this dialog. |
| Now your project should rebuild without errors relating to finding |
| the include files. |
| <p> |
| <h2 id="mpicc">Specifying the mpicc toolchain</h2> |
| |
| <p>Now specify the build/link command. |
| Again in Project properties, C/C++ build page, Tool Settings tab, |
| click on "GCC C compiler" |
| and change the default "gcc" value to "mpicc" |
| (or whatever the build command is for your MPI environment). |
| <br><img src="images/projPropsMpicc.gif"> |
| <p>Then do the same for the "GCC C Linker." |
| <br><img src="images/projPropsMpicc2.gif"> |
| <p>Now proceed to <a href="02pLaunchConfig.html">launch the parallel program.</a> |
| <p> |
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| <p> |
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