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>hardware</SPAN
></H1
><DIV
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><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
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>Synopsis</H2
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CLASS="SYNOPSIS"
>cdl_option <name> {
active_if <condition>
…
}</PRE
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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
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><H2
>Example</H2
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><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
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><A
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></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
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