Prerequisites

You should be familiar with Makefiles, and complete the Large Projects module before starting this lab.

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Overview

CVODE is a package of routines which are used to solve normal and stiff systems of Ordinary Differential Equations (ODE). The package is written in ANSI C. A library of routines is built in the first step, after which a specific application can be created linking this library. The goal of this exercise is to rewrite the Makefiles to be portable (MS nmake or GNU make). Intel C/C++ was chosen to replace GNU C/C++ in MS Windows.

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Exercise

Initial Setup

Copy the archive file Proj02.tar which contains all sources into a separate directory.

 
      copy H:\VWLabs\Large\Proj02.tar .
      

Unpack the archive using the command:

      tar -xvf Proj02.tar
      

and change the root project directory:

      cd Proj02\CVODE
      

The project top directory contains a few directories:

  CVODE --------+-------- examples 
                |                |    
                +-------- lib    +----- band_ex     
                |                         |
                +-------- include         +----- cvbx.c
                |                         |
                +-------- source          +----- Makefile
                |
                +-------- Makefile

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Compiling

The Makefile from directory CVODE can be used to compile the project with "gcc" in the CygWin (or UNIX) environment.

       make

A library "libcvode.a" is created in directory "lib" after compiling all C files from directory "source".

Your next task is to add one additional routine to the project "timer_unix.c" and to create a new Makefile which will use the Intel C/C++ compiler 4.5 and will work with MS "nmake" as well with GNU "make".

A solution makefile Int32.mak is provided. This makefile creates a new library "libcvode32.lib" which also contains a timer routine "time00()":

       nmake

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Solution

The directory "CVODE/examples/band_ex" contains another Makefile to create an application cvbx.exe with GNU make:

       make

An equivalent MS nmake makefile - Int32.mak  will create a similar application - cvbx32.exe - which in addition to the main computations will compute elapsed CPU time:

       nmake

To see the difference in the output for both applications, run both of them (cvbx.exe and cvbx32.exe) and compare the output.

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Cleanup

After you are done, you can remove the top directory Proj02 along with all subdirectories and files:

        rmdir /S /Q Proj02     

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