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An <a href="MLBasis">ML Basis</a> <em>path map</em> describes a map from ML Basis path variables (of the form <tt>$(VAR)</tt>) to file system paths. ML Basis path variables provide a flexible way to refer to libraries while allowing them to be moved without changing their clients. <p>
The format of an <tt>mlb-path-map</tt> file is a sequence of lines; each line consists of two, white-space delimited tokens. The first token is a path variable <tt>VAR</tt> and the second token is the path to which the variable is mapped. The path may include path variables, which are recursively expanded.
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The mapping from path variables to paths is initialized by reading a system-wide configuration file: <tt>/usr/lib/mlton/mlb-path-map</tt>. Additional path maps can be specified with <tt>-mlb-path-map</tt> and individual path variable mappings can be specified with <tt>-mlb-path-var</tt> (see <a href="CompileTimeOptions">CompileTimeOptions</a>). Configuration files are processed from first to last and from top to bottom, later mappings take precedence over earlier mappings.
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The compiler and system-wide configuration file makes the following path variables available.
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MLB path variable</td>
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Description</td>
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<tt>SML_LIB</tt></td>
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path to system-wide libraries, usually <tt>/usr/lib/mlton/sml</tt></td>
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<tt>TARGET_ARCH</tt></td>
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string representation of target architecture</td>
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<tt>TARGET_OS</tt></td>
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string representation of target operating system</td>
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Last edited on 2010-04-06 17:43:43 by <span title="129.21.75.73"><a href="MatthewFluet">MatthewFluet</a></span>.
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