2.3. LSB Implementation Conformance

A conforming implementation is necessarily architecture specific, and must provide the interfaces specified by both the generic LSB specifications and the applicable architecture specific part.

A conforming implementation shall satisfy the following requirements:

• A processor architecture represents a family of related processors which may not have identical feature sets. The architecture specific part of the LSB Core Specification for a given target processor architecture describes a minimum acceptable processor. The implementation shall provide all features of this processor, whether in hardware or through emulation transparent to the application.

• The implementation shall be capable of executing compiled applications having the format and using the system interfaces described in this specification.

• The implementation shall provide libraries containing the interfaces specified by this specification, and shall provide a dynamic linking mechanism that allows these interfaces to be attached to applications at runtime. All the interfaces shall behave as specified in this specification.

• The map of virtual memory provided by the implementation shall conform to the requirements of this specification.

• The implementation's low-level behavior with respect to function call linkage, system traps, signals, and other such activities shall conform to the formats described in this specification.

• The implementation shall provide all of the mandatory interfaces in their entirety.

• The implementation may provide one or more of the optional interfaces. Each optional interface that is provided shall be provided in its entirety. The product documentation shall state which optional interfaces are provided.

• The implementation shall provide all files and utilities specified as part of this specification in the format defined here and in other documents normatively included by reference. All commands and utilities shall behave as required by this specification. The implementation shall also provide all mandatory components of an application's runtime environment that are included or referenced in this specification.

• The implementation, when provided with standard data formats and values at a named interface, shall provide the behavior defined for those values and data formats at that interface. However, a conforming implementation may consist of components which are separately packaged and/or sold. For example, a vendor of a conforming implementation might sell the hardware, operating system, and windowing system as separately packaged items.

• The implementation may provide additional interfaces with different names. It may also provide additional behavior corresponding to data values outside the standard ranges, for standard named interfaces.

• The implementation shall report whether supports for each of the modules constituting this specification is currently available, with the exception of the Trial Use module, which need not be reported. At a minimum, this reporting shall be performed using the lsb_release command described in the LSB Core module specification.

  Rationale: An implementation must support all modules described as mandatory in this specification. However, excepting the LSB Core module, which is always required, the support for a module may not be installed or enabled. The intent of this clause is to indicate a run-time query mechanism to determine the status of module support.