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<!-- Copyright (C) 2003 Red Hat, Inc. --> <!-- This material may be distributed only subject to the terms --> <!-- and conditions set forth in the Open Publication License, v1.0 --> <!-- or later (the latest version is presently available at --> <!-- http://www.opencontent.org/openpub/). --> <!-- Distribution of the work or derivative of the work in any --> <!-- standard (paper) book form is prohibited unless prior --> <!-- permission is obtained from the copyright holder. --> <HTML ><HEAD ><TITLE >hardware</TITLE ><meta name="MSSmartTagsPreventParsing" content="TRUE"> <META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+ "><LINK REL="HOME" TITLE="The eCos Component Writer's Guide" HREF="cdl-guide.html"><LINK REL="UP" TITLE="CDL Language Specification" HREF="reference.html"><LINK REL="PREVIOUS" TITLE="flavor" HREF="ref.flavor.html"><LINK REL="NEXT" TITLE="if_define" HREF="ref.if-define.html"></HEAD ><BODY CLASS="REFENTRY" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >The <SPAN CLASS="APPLICATION" >eCos</SPAN > Component Writer's Guide</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="ref.flavor.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="ref.if-define.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="REF.HARDWARE"><SPAN CLASS="PROPERTY" >hardware</SPAN ></H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN4413" ></A ><H2 >Name</H2 >Property <SPAN CLASS="PROPERTY" >hardware</SPAN > -- Specify that a package is tied to specific hardware.</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN4417"><H2 >Synopsis</H2 ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="SYNOPSIS" >cdl_option <name> { active_if <condition> … }</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4419" ></A ><H2 >Description</H2 ><P >Some packages such as device drivers and HAL packages are hardware-specific, and generally it makes no sense to add such packages to a configuration unless the corresponding hardware is present on your target system. Typically hardware package selection happens automatically when you select your target. The <SPAN CLASS="PROPERTY" >hardware</SPAN > property can be used in the body of a <TT CLASS="LITERAL" >cdl_package</TT > command to indicate that the package is hardware-specific.</P ><DIV CLASS="NOTE" ><BLOCKQUOTE CLASS="NOTE" ><P ><B >Note: </B >At the time of writing the <SPAN CLASS="PROPERTY" >hardware</SPAN > property is largely ignored by the configuration tools, but this may change in future. Amongst other possible changes, for hardware-specific packages such as device drivers and HAL packages, the current scheme of generating a configuration header file name based purely on the package name may be abandoned. Instead all hardware packages would send their configuration data to a single header file, <TT CLASS="FILENAME" >pkgconf/hardware.h</TT >. This would make it easier for code to obtain details of the current hardware, but obviously there are compatibility issues. For now it is recommended that all hardware packages specify their configuration header file explicitly.</P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4428" ></A ><H2 >Example</H2 ><TABLE BORDER="5" BGCOLOR="#E0E0F0" WIDTH="70%" ><TR ><TD ><PRE CLASS="PROGRAMLISTING" >cdl_package CYGPKG_HAL_ARM { display "ARM architecture" parent CYGPKG_HAL hardware include_dir cyg/hal define_header hal_arm.h … }</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN4431" ></A ><H2 >See Also</H2 ><P >Property <A HREF="ref.define-header.html" ><SPAN CLASS="PROPERTY" >define_header</SPAN ></A >, and command <A HREF="ref.cdl-package.html" ><TT CLASS="LITERAL" >cdl_package</TT ></A >.</P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="ref.flavor.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="cdl-guide.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="ref.if-define.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><SPAN CLASS="PROPERTY" >flavor</SPAN ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="reference.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><SPAN CLASS="PROPERTY" >if_define</SPAN ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >
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