6 every soft-pkg uses tree stage version code.
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7 the first id is main version id, it shows the main architecture of a soft
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9 the second id is function feature version id. it shows function feature
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11 the third id is patch version id. when the function feature version is
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12 improved, increase patch version id for it.
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13 the fourth id is publish date string. it save date info for a version code.
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17 v<VER1>.<VER2>.<VER3>-<VDATE>[-<VSFX>]
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18 VER1: main version code, it means the architecture of the src-pkg.
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19 VER2: minor version code, function feature version code. increase it when the
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20 new feature is appended.
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21 VER3: patch version code, it means that some bug or little improve is patched
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23 VDATA:publish date version code, others can read the date info clearly.
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24 VSFX: suffix version code, it's the assistant version info for a src-pkg. the
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25 classical sfx 'LTS' means 'long time support', and it will be supported
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26 in several years. 'vX.0.X' must be a 'LTS' version, it's an actual
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27 meaning of publish version for src-pkg, and defined the external function
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28 or cmdline interface.
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33 version id is managed by 'versionid' script program in devutils. it
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34 increase different stage of version id, and searching version info in src dir,
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35 modify them at the same time.
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36 this program will be integrated in build-pkg, it's a sub-cmd of build-pkg.
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