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<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
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<!-- This material may be distributed only subject to the terms      -->
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<!-- and conditions set forth in the Open Publication License, v1.0  -->
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<!-- or later (the latest version is presently available at          -->
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<!-- http://www.opencontent.org/openpub/).                           -->
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<!-- Distribution of the work or derivative of the work in any       -->
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<!-- standard (paper) book form is prohibited unless prior           -->
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<!-- permission is obtained from the copyright holder.               -->
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<HTML
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><HEAD
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><TITLE
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>include_dir</TITLE
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><meta name="MSSmartTagsPreventParsing" content="TRUE">
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<META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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"><LINK
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REL="HOME"
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TITLE="The eCos Component Writer's Guide"
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HREF="cdl-guide.html"><LINK
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REL="UP"
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TITLE="CDL Language Specification"
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HREF="reference.html"><LINK
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REL="PREVIOUS"
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TITLE="implements"
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><BODY
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TEXT="#000000"
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VLINK="#840084"
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><DIV
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><TABLE
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SUMMARY="Header navigation table"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>The <SPAN
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CLASS="APPLICATION"
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>eCos</SPAN
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> Component Writer's Guide</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="ref.implements.html"
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>Prev</A
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></TD
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><TD
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></TD
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><TD
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><A
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>Next</A
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><HR
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WIDTH="100%"></DIV
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><H1
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><A
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NAME="REF.INCLUDE-DIR"><SPAN
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CLASS="PROPERTY"
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>include_dir</SPAN
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></H1
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><DIV
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CLASS="REFNAMEDIV"
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><A
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NAME="AEN4534"
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></A
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><H2
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>Name</H2
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>Property <SPAN
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CLASS="PROPERTY"
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>include_dir</SPAN
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>&nbsp;--&nbsp;Specify the desired location of a package's exported
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header files in the install tree.</DIV
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><DIV
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CLASS="REFSYNOPSISDIV"
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><A
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NAME="AEN4538"><H2
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>Synopsis</H2
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><TABLE
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><TR
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><TD
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><PRE
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CLASS="SYNOPSIS"
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>cdl_package &lt;name&gt; {
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    include_dir &lt;sub-directory&gt;
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    &#8230;
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}</PRE
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></TD
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></TR
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></TABLE
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN4540"
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></A
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><H2
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>Description</H2
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><P
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>Most packages export one or more header files defining their public
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interface. For example the C library exports header files such as
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<TT
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CLASS="FILENAME"
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>stdio.h</TT
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> and
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<TT
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CLASS="FILENAME"
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>ctype.h</TT
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>.
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If the package follows the <A
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HREF="package.html#PACKAGE.HIERARCHY"
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>directory
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layout conventions</A
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> then the exported header files will normally
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be found in the package's
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<TT
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CLASS="FILENAME"
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>include</TT
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> sub-directory.
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Alternatively the <SPAN
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CLASS="PROPERTY"
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>include_files</SPAN
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> property can be used to specify
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which header files should be exported.</P
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><P
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>By default a package's exported header files will be copied to
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the <TT
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CLASS="FILENAME"
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>include</TT
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> sub-directory of
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the install tree. This is correct for packages like the C library
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because that is the correct location for files such as
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<TT
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CLASS="FILENAME"
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>stdio.h</TT
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>. However to reduce the
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probability of name clashes it is desirable for packages to use
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different sub-directories, for example infrastructure header files get
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copied to <TT
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CLASS="FILENAME"
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>include/cyg/infra</TT
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>
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rather than to the top-level
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<TT
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CLASS="FILENAME"
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>include</TT
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> directory itself.</P
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><P
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>It would be possible to replicate these sub-directories in each
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package's source tree, such that the infrastructure header file
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sources lived in
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<TT
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CLASS="FILENAME"
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>include/cyg/infra</TT
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> in the source
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tree as well as in the install tree. This would make things more
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difficult for the package developers. Instead it is possible to
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specify the desired install tree sub-directory using an <SPAN
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CLASS="PROPERTY"
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>include_dir</SPAN
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>
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property, for example <TT
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CLASS="LITERAL"
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>include_dir&nbsp;cyg/infra</TT
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>.</P
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><P
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>The <SPAN
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CLASS="PROPERTY"
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>include_dir</SPAN
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> property can only be used in the body of a
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<TT
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CLASS="LITERAL"
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>cdl_package</TT
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> command, since it applies to all of the header files
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exported by a package, and only one <SPAN
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CLASS="PROPERTY"
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>include_dir</SPAN
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> property can be
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used. If there is no <SPAN
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CLASS="PROPERTY"
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>include_dir</SPAN
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> property then exported header files
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will end up in the top-level <TT
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CLASS="FILENAME"
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>include</TT
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>
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directory of the install tree.</P
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN4563"
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></A
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><H2
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>Example</H2
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><TABLE
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><TR
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><TD
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><PRE
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CLASS="PROGRAMLISTING"
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>cdl_package CYGPKG_INFRA {
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    display       "Infrastructure"
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    include_dir   cyg/infra
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    description   "
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        Common types and useful macros.
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        Tracing and assertion facilities.
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        Package startup options."
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    &#8230;
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}</PRE
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></TD
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></TR
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></TABLE
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></DIV
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><DIV
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CLASS="REFSECT1"
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><A
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NAME="AEN4566"
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></A
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><H2
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>See Also</H2
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><P
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>Property <A
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HREF="ref.include-files.html"
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><SPAN
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CLASS="PROPERTY"
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>include_files</SPAN
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></A
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>, and
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command <A
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HREF="ref.cdl-package.html"
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><TT
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CLASS="LITERAL"
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>cdl_package</TT
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></A
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>.</P
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></DIV
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><HR
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ALIGN="LEFT"
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SUMMARY="Footer navigation table"
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="ref.implements.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="cdl-guide.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="ref.include-files.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><SPAN
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CLASS="PROPERTY"
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>implements</SPAN
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="reference.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><SPAN
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CLASS="PROPERTY"
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>include_files</SPAN
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></TD
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></TABLE
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