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Racket appears to have a different notion of current directory than the system does, so we need to tell it which directory we think we're in when reading and writing bytevectors using the scheme file functions.
46 lines
1.3 KiB
ReStructuredText
46 lines
1.3 KiB
ReStructuredText
*********************
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Racket Code Generator
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*********************
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The Racket code generator is accessed via a REPL command:
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::
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Main> :set cg racket
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Alternatively, you can set it via the ``IDRIS2_CG`` environment variable:
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::
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$ export IDRIS2_CG=racket
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You can compile an expression ``expr`` of type ``IO ()`` to an executable as
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follows, at the REPL:
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::
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Main> :c execname expr
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...where ``execname`` is the name of the executable file. This will generate
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the following:
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* A shell script ``build/exec/execname`` which invokes the program
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* A subdirectory ``build/exec/execname_app`` which contains all the data necessary
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to run the program. This includes the Racket source (``execname.rkt``),
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the compiled Racket code (``execname`` or ``execname.exe`` on Windows)
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and any shared libraries needed for foreign function definitions.
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The executable ``execname`` is relocatable to any subdirectory, provided that
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``execname_app`` is also in the same subdirectory.
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You can also execute an expression directly:
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::
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Main> :exec expr
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Again, ``expr`` must have type ``IO ()``. This will generate a temporary
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executable script ``_tmpracket`` in the ``build/exec`` directory, and execute
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that, without compiling to a binary first (so the resulting Racket code is
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interpreted).
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