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162 lines
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HTML
162 lines
7.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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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>Building C/C++ 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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<div role="main">
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<h1>Building C/C++ projects</h1>
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<p>The CDT relies on an external make utility, such as GNU make, to
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build a project. The CDT can generate makefiles automatically when you
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create a Managed Make C project or a Managed Make C++ project. You have
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the option of creating a Standard Make C project or a Standard Make C++
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project and providing the makefile yourself.</p>
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<h2>Required utilities</h2>
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<p>You must install and configure the following utilities:
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</p>
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<ul>
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<li>Build (e.g. make).</li>
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<li>Compile (e.g. gcc).</li>
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<li>Debug (e.g. gdb).</li>
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</ul>
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<strong>Note: </strong> while make, gcc and gdb are the examples used in the
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documentation, virtually any similar set of tools or utilities could be
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used.
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<p></p>
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<p><strong>Tip: </strong>Cygwin contains these utilities (make, gcc and gdb) for
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a Windows environment. While running the cygwin installation,
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ensure <span class="typewriter">gcc</span> and <span class="typewriter">make</span> are selected since they are not
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installed by default. For more information, see <a
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href="https://www.cygwin.com">https://www.cygwin.com</a>. If you are a
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Red Hat user, all that you need to do to build your project is included
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in the Red Hat Linux installation.
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For other operating systems, please refer to your installation
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documentation.</p>
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<p></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, assuming all is defined in
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your makefile). Only the components affected by modified files in that
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particular 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
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modified since the last build. A rebuild is a clean followed by a build.</p>
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<p>For more information on builds, see:</p>
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<ul>
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<li><strong>Workbench User Guide > Concepts > Workbench > Builds</strong></li>
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<li><strong>Workbench User Guide > Tasks > Building resources</strong></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 Console view displays the output of the build tools.</li>
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<li>The Problems view displays a list of compiler errors and warnings
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related to your projects.</li>
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<li>For Standard Make projects, the Makefile targets are displayed in
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the Make Targets view.</li>
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</ul>
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<p>For more information about the Problems view, see <strong>Workbench User
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Guide > Reference > User interface information > Views and
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editors > Problems view</strong>.</p>
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<h2>Getting a makefile</h2>
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<p>You can either create a C/C++ project for which you supply the <strong>makefile</strong>
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or create a C/C++ project for which the CDT generates makefiles
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automatically.</p>
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<p>To create a new project, from the menu bar choose <strong>File > New
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> Project</strong>. In the dialog that appears, expand the C/C++ group
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and choose e.g. C Project</p>
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<ul>
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<li>In the resulting wizard page, to create a project for which you supply the <strong>makefile</strong>,
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select <strong>Makefile project</strong> and choose one of the alternatives under that.
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An empty project, or a simple "Hello World" can be created.
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You edit and manage the makefile yourself.
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<p> </p>
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</li>
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<li>To create a project for which the CDT supplies a basic <strong>makefile</strong>,
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select another project type, e.g. <strong>Executable</strong> and choose one of the examples
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under that, or choose <strong>Empty Project</strong>.
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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, you can set the <em>build
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order</em>. If your project refers to another project, the CDT must
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build the other project first. To set the build order, from the menu
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bar select <strong>Window > Preferences</strong> and choose <strong> General > Preferences > Build Order</strong>.
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<p>When you set the build order, the CDT does not rebuild projects
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that depend on a project; you must rebuild all projects to ensure all
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changes are propagated.</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 <em>automatic save</em> of all
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modified resources when you perform a manual build. In the preferences dialog,
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select <strong>General > Workspace</strong> and check <strong>Save automatically before build</strong>.
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By default,
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this feature is <em>not</em> enabled.</dd>
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</dl>
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<h2>Controlling the building of your project</h2>
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<p>For a Makefile project, the C/C++ compiler that a project uses
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is controlled by the project's <strong>Properties</strong> setting.
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To view a project's properties, right-click on the project and select <strong>Properties</strong>.
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In the dialog that appears, the <strong>C/C++ Build</strong>
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page enables you to control a variety of settings, including:</p>
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<dl>
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<dt>Build Command</dt>
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<dd>On the <strong>Builder Settings</strong> tab, this controls which <code>make</code> is used. To change it, uncheck <strong>Use
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default build command</strong> and change it or add arguments to the make command.</dd>
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<dt>Build Setting</dt>
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<dd>On the <strong>Behaviour</strong> tab, this controls whether the compiler will <strong>Stop on first build error</strong> or not
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(keep going). Unchecking <strong>Stop on first build error</strong> will force the compiler to attempt to build all referenced
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projects even if the current project has errors.</dd>
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<dt>Workbench Build Behavior</dt>
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<dd>On the <strong>Behaviour </strong> tab, this controls which makefile target will be built depending on the scope of the
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build, e.g. <code>all</code> or <code>clean</code>.</dd>
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</dl>
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<p>For a standard (non-Makefile) project (often called "Managed Build" or "Managed Make" project from
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earlier CDT version), the project properties dialog enables
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you to manage the build configurations of your project. For additional
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information see:</p>
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<ul>
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<li><strong>Reference > C/C++ Properties > C/C++ Project Properties > Managed Make
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Projects</strong></li>
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<li><strong>Reference > C/C++ Properties > C/C++ Project Properties > Managed Make File
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Properties</strong></li>
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</ul>
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<h2>Viewing build information</h2>
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<p>Build-related information is displayed as follows: </p>
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<ul>
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<li>The <strong>Console</strong> view displays the output of the make utility.</li>
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<li>The <strong>Problems</strong> view displays a list of compiler errors and
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warnings related to your projects. </li>
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<li>For a Standard Make project, build actions display in the <strong>Make
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Targets</strong> view.</li>
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</ul>
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<p><img src="../images/ngconcepts.gif" alt="Related concepts"
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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 src="../images/ngtasks.gif" alt="Related tasks"
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width="143" height="21">
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<br>
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<a href="../tasks/cdt_o_build_task.htm">Building projects</a></p>
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<p><img src="../images/ngref.gif" alt="Related reference"
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width="143" height="21">
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<br>
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<a href="../reference/cdt_u_properties.htm">Project Properties</a></p>
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<p><img src="../images/rh03_04.gif" alt="Red Hat Copyright Statement"><br>
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<img src="../images/ng00_04a.gif" alt="IBM Copyright Statement">
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</p>
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</div>
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</body>
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</html>
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