The eCos Component Writer's Guide

Bart Veer

John Dallaway

Table of Contents (expand | collapse)
  1. + 1. Overview
  2. + 2. Package Organization
  3. + 3. The CDL Language
  4. + 4. The Build Process
  5. + 5. CDL Language Specification
    •   cdl_option -- Define a single configuration option
    •   cdl_component -- Define a component, a collection of configuration options
    •   cdl_package -- Define a package, a component that can be distributed
    •   cdl_interface -- Define an interface, functionality that can be provided bya number of different implementations.
    •   active_if -- Allow additional control over the active state of anoption or other CDL entity.
    •   calculated -- Used if the current option's value is not user-modifiable,but is calculated using a suitable CDL expression.
    •   compile -- List the source files that should be built if this optionis active and enabled.
    •   default_value -- Provide a default value for this option using a CDL expression.
    •   define -- Specify additional #define symbols thatshould go into the owning package's configuration header file.
    •   define_format -- Control how an option's value will appear in theconfiguration header file.
    •   define_header -- Specify the configuration header file thatwill be generated for a given package.
    •   define_proc -- Use a fragment of Tcl code to output additional data toconfiguration header files.
    •   description -- Provide a textual description for an option.
    •   display -- Provide a short string describing this option.
    •   doc -- The location of online-documentation for a configuration option.
    •   flavor -- Specify the nature of a configuration option.
    •   hardware -- Specify that a package is tied to specific hardware.
    •   if_define -- Output a common preprocessor construct to a configurationheader file.
    •   implements -- Enabling this option provides one instance of a moregeneral interface.
    •   include_dir -- Specify the desired location of a package's exportedheader files in the install tree.
    •   include_files -- List the header files that are exported by a package.
    •   legal_values -- Impose constraints on the possible values for an option.
    •   library -- Specify which library should contain the object filesgenerated by building this package.
    •   make -- Define an additional custom build step associated with anoption, resulting in a target that should not go directly into a library.
    •   make_object -- Define a custom build step, resulting in an object filethat should go into a library.
    •   no_define -- Suppress the normal generation of a preprocessor#define symbol in a configuration header file.
    •   parent -- Control the location of an option in the configuration hierarchy.
    •   requires -- List constraints that the configuration should satisfy ifa given option is active and enabled..
    •   script -- Include additional configuration information from anotherCDL script.
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