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(libc.info)Utility Minimums

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Minimum Values for Utility Limits
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`_POSIX2_BC_BASE_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     value of `obase' in the `bc' utility.  Its value is `99'.

`_POSIX2_BC_DIM_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     size of an array in the `bc' utility.  Its value is `2048'.

`_POSIX2_BC_SCALE_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     value of `scale' in the `bc' utility.  Its value is `99'.

`_POSIX2_BC_STRING_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     size of a string constant in the `bc' utility.  Its value is
     `1000'.

`_POSIX2_COLL_WEIGHTS_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     number of weights that can necessarily be used in defining the
     collating sequence for a locale.  Its value is `2'.

`_POSIX2_EXPR_NEST_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     number of expressions nested within parenthesis when using the
     `expr' utility.  Its value is `32'.

`_POSIX2_LINE_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     size of a text line that the text utilities can handle.  Its value
     is `2048'.

`_POSIX2_EQUIV_CLASS_MAX'
     The most restrictive limit permitted by POSIX.2 for the maximum
     number of weights that can be assigned to an entry of the
     `LC_COLLATE' category `order' keyword in a locale definition.  Its
     value is `2'.  The GNU C library does not presently support locale
     definitions.