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Memory Pool System Project

                  DESIGN OF THE MPS LIBRARY VERSION MECHANISM
                           design.mps.version-library
                                 incomplete doc
                                 drj 1998-08-19

    INTRODUCTION

    .intro: This describes the design of a mechanism to be used to determine the
    version (that is, product, version, and release) of an MPS library.

    READERSHIP

    .readership: Any MPS developer.

    SOURCE

    .source: Various requirements demand such a mechanism.  See
    request.epcore.160021: There is no way to tell which version and release of the
    MM one is using.

    OVERVIEW

    .overview: See design.mps.version for discussion and design of versions of
    other aspects of the software.  This document concentrates on a design for
    determining which version of the library one has linked with.  There are two
    aspects to the design, allowing humans to determine the version of an MPS
    library, and allowing programs to determine the version of an MPS library.
    Only the former is currently designed (a method for humans to determine which
    version of an MPS library is being used).

    .overview.impl: The overall design is to have a distinctive string compiled
    into the library binary.  Various programs and tools will be able to extract
    the string and display it.  The string will identify the version of the MPS
    begin used.

    ARCHITECTURE

    .arch.structure: The design consists of 3 components:

    .arch.string: A string embedded into any delivered library binaries (which will
    encode the necessary information).

    .arch.proc: A process by which the string is modified appropriately whenever
    releases are made.

    .arch.tool: A tool and its documentation (it is expected that standard tools
    can be used).  The tool will be used to extract the version string from a
    delivered library or an executable linked with the library.

    .arch.not-here: Only the string component (:arch.string) is directly described
    here.  The other components are described elsewhere.  (where?)

    The string will contain information to identify the following items:
    .arch.string.platform: the platform being used.
    .arch.string.product: the name of the product.
    .arch.string.variety: the variety of the product.
    .arch.string.version: the version and release of the product.

    IMPLEMENTATION

    .impl.file: The string itself is a declared C object in the file version.c
    (impl.c.version).  It consists of a concatenation of various strings which are
    defined in other modules.

    .impl.variety: The string containing the name of the variety is the expansion
    of the macro MPS_VARIETY_STRING defined by config.h (impl.h.config).

    .impl.product: The string containing the name of the product is the expansion
    of the macro MPS_PROD_STRING defined by config.h (impl.h.config).

    .impl.platform: The string containing the name of the platform is the expansion
    of the macro MPS_PF_STRING defined by mpstd.h (impl.h.mpstd).

    .impl.date: The string contains the date and time of compilation by using the
    __DATE__ and __TIME__ macros defined by ISO C (ISO C clause 6.8.8).

    .impl.version: The string contains the version and release of the product.
    This is by the expansion of the macro MPS_RELEASE which is defined in this
    module (version.c).

    .impl.usage: To make a release, the MPS_RELEASE macro (see
    impl.c.version.release) is edited to contain the release name (e.g.,
    "release.epcore.brisling"), and then changed back immediately after the release
    checkpoint is made.

## A. References

## B. Document History

2002-06-07 | RB | Converted from MMInfo database design document.

## C. Copyright and License

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