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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
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<html lang="en">
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<head>
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<meta http-equiv="Content-Language" content="en-us">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>CDT projects</title>
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<link rel="stylesheet" type="text/css" href="../help.css">
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</head>
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<body>
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<h1>Building C/C++ projects</h1>
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<p>The CDT uses the same make utility and makefile used on the command line.
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The CDT can generate makefiles automatically when you create a Managed Make C project or a Managed Make C++ project.
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You have the option of creating a Standard Make C project or a Standard Make C++ project and providing the makefile.</p>
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<h2>Required utilities</h2>
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<p>You must install and configure the following utilities:</p>
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<ul>
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<li>Build (such as <tt>make</tt>).</li>
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<li>Compile (such as gcc). For more information, see <a href="http://gcc.gnu.org">http://gcc.gnu.org</a>.</li>
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<li>Debug (such as gdb). For more information, see <a href="http://sources.redhat.com/gdb/">http://sources.redhat.com/gdb/</a>.</li>
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</ul>
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<p>Cygwin contains these utilities for a Windows environment, while running the cygwin installation ensure <tt>gcc</tt> and <tt>make</tt> are selected, they are not installed by default.
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For more information, see <a href="http://www.cygwin.com">http://www.cygwin.com</a>. Red Hat users, all you need to build your project is included in the Red Hat Linux installation.
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For other operating systems please refer to your installation documentation.</p>
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</p>
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<p>To test if your compiler was installed correctly open a command prompt or terminal window and type <tt>g++</tt> or <tt>make</tt>.
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An error message stating the command was not found or not recognized means that the utility is not installed or your path is not configured correctly.</p>
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<p>To check your path at a command prompt and the appropriate path command (i.e. enter <tt>PATH</tt> for windows users or <tt>echo $PATH</tt> for linux users). Make sure that the path to your build utility is defined (example <tt>PATH=c:\cygwin\bin</tt>).<p>
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<h2>Build terminology</h2>
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<p>The CDT uses a number of terms to describe the scope of the build. </p>
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<h3>Build Project</h3>
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<p>This is an incremental build (make all). Only the components affected by modified files in that particular
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project are built.</p>
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<h3>Rebuild Project</h3>
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<p>Builds every file in the project whether or not a file has been modified since
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the last build. A rebuild is a clean followed by a
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build.</p>
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<p>For more information on builds, see:</p>
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<ul>
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<li><b>Workbench User Guide > Concepts > Workbench > Builds</b></li>
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<li><b>Workbench User Guide > Tasks > Building resources</b></li>
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</ul>
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<p>Build-related information is displayed as follows:</p>
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<ul>
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<li>The C-Build view displays the output of the make utility.</li>
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<li>The Tasks view displays a list of compiler errors and warnings related to
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your projects.</li>
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<li>Makefile actions are displayed in the Make Targets view.</li>
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</ul>
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<p>For more information about the Tasks view, see <b>Workbench User Guide > Reference > User interface information > Views and editors > Tasks
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view</b>.</p>
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<h2>Getting a makefile</h2>
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<p>You can either create a C project for which you supply the
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<span class="filename">makefile</span>
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or create a C project for which the CDT generates makefiles automatically.
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</p>
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<p>To create a new project, from the menu bar choose
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<span class="guilabel">File > New > Project</span>.
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In the dialog that appears:
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</p>
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<ul>
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<li>To create a project for which you supply the <span class="filename">makefile</span>,
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select either
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<span class="guilabel">Standard Make C project</span> or
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<span class="guilabel">Standard Make C++ project</span>.
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</li>
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<li>To create a project for which the CDT supplies a basic
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<span class="filename">makefile</span>, select either
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<span class="guilabel">Managed Make C project</span> or
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<span class="guilabel">Managed Make C++ project</span>.
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</li>
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</ul>
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<h2>Setting build preferences</h2>
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<p>You can set build preferences in Eclipse:</p>
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<dl>
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<dt>Build order</dt>
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<dd>If certain projects must be built before others,
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you can set the <i>build order</i>.
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If your project refers to another project, the CDT must build the other project first.
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To set the build order, from the menu bar select
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<span class="guilabel">Window > Preferences >
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Build Order</span>.
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<p>When you set the build order, the CDT does not rebuild projects
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that depend
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on a project; you must rebuild all projects to ensure all changes are
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propagated.
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</p>
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</dd>
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<dt>Automatic save</dt>
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<dd>You can set the CDT to perform an <i>automatic save</i> of all modified resources
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when you perform a manual build; from the menu bar, select
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<span class="guilabel">Windows > Preferences > Workbench</span>.
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By default, this feature is disabled.
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</dd>
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</dl>
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<h2>Controlling the building of your project</h2>
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<p>The C/C++ compiler that a project uses is controlled by the project's
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<span class="guilabel">Properties</span> setting.
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To view a project's properties, right-click on the project and select
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<span class="guilabel">Properties</span>.
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In the dialog that appears, the
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<span class="guilabel">C/C++ Make Project</span> page enables you
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to control a variety of settings, including:</p>
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<dl>
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<dt>Build Setting</dt>
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<dd>Controls whether the compiler will <span class="guilabel">Stop On Error</span>
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or <span class="guilabel">Keep Going On Error</span>.
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Choosing <span class="guilabel">Keep Going On Error</span> will force the compiler to
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attempt to build all referenced projects even if the current project has errors.
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</dd>
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<dt>Build Command</dt>
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<dd>Controls which compiler is used.
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By default the compiler is <span class="command">C Builder</span>
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(<span class="command">gcc</span>).</dd>
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<dt>Workbench Build Behavior</dt>
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<dd>Controls the auto-build on save feature and what operations
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are performed during a build and rebuild.</dd>
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</dl>
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<p>The <span class="guilabel">External Tools Builders</span> page
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enables you to add, reorder, or remove external build tools.
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</p>
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<h2>Viewing build information</h2>
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<p>Build-related information is displayed as follows:
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</p>
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<ul>
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<li>The <span class="guilabel">C-Build</span> view displays the output of the make utility.</li>
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<li>The <span class="guilabel">Tasks</span> view displays a list
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of compiler errors and warnings related to your projects.
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</li>
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<li>Build actions display in the <span class="guilabel">Make Targets</span> view.</li>
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</ul>
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<p><img border="0" src="../images/ngconcepts.gif" ALT="Related concepts" width="143" height="21">
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<br>
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<a href="cdt_c_projects.htm">CDT Projects</a><br>
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<a href="cdt_c_proj_file_views.htm">Project file views</a></p>
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<p><img border="0" src="../images/ngtasks.gif" ALT="Related tasks" width="143" height="21">
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<br>
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<a href="../tasks/cdt_o_proj_prop.htm">Defining project properties</a><br>
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<a href="../tasks/cdt_o_build_task.htm">Building</a></p>
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<p>
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<img src="../images/rh03_04.gif" ALT="IBM Copyright Statement" BORDER=0 width="324" height="14"><br>
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<img src="../images/ng03_04.gif" ALT="IBM Copyright Statement" BORDER=0 width="324" height="14">
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</p>
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</body>
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</html> |