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BOOST_PREDEF_WORKAROUND
          and BOOST_PREDEF_TESTED_AT
          macros for defect workarounds and detection.
        BOOST_VERSION_NUMBER_MAJOR,
          BOOST_VERSION_NUMBER_MINOR,
          BOOST_VERSION_NUMBER_PATCH
          macros to extract components from valid version numbers.
        BOOST_HW_*
          category (from Charly Chevalier).
        AVAILABLE
          macros for Windows Platform. (from Vemund Handeland)
        predef_check
          functionality.
        and and or logical operators for predef_check
          expression on the Boost Build side.
        BOOST_ARCH_PARISC to
          correctly spelled name (from Graham Hanson).
        MAKE_YYYYM macros to
          correctly limit the month (from rick68).
        BOOST_PREDEF_MAKE_0X_VVRRPP
          macro (from Erik Lindahl).
        predef_check program
          and BBv2 integration for build configuration checks.
        BOOST_PLAT_* platform definitions for MinGW and Windows
          platform variants.
        | ![[Warning]](../../../doc/src/images/warning.png) | Warning | 
|---|---|
| 
        The big change for this version is the restructuring of the definitions to
        avoid duplicate definitions in one category. That is, only one  |