ml-nlffigen(1) SML No Longer Foreign Function Interface tool


ml-nlffigen [option] -- file


This manual page documents briefly the ml-nlffigen command. This manual page was written for the Debian distribution because the original program does not have a manual page.

ml-nlffigen, a glue-code generator for the new NLFFI foreign function interface. The generator reads C source code and emits ML code along with a description file for CM.


A summary of options is included below.
-dir dir
-d d
Output directory where all generated files are placed.
default: NLFFI-Generated.
Instructs ml-nlffigen
to include all structs and unions, even those that are defined in included files (as opposed to files explicitly listed as arguments). default: off.
-width w
-w w
Sets output line width (just a guess) to w
. default: 75.
-smloption x
ml-nlffigen to include x into the list of options to annotate .sml entries in the generated .cm file with. default: noguid.
Removes the default -noguid
from the list of sml options. (This re-enables strict handling of type- and object-identity but can have negative impact on CM cutoff recompilation performance if the programmer routinely removes the entire tree of ml-nlffigen-generated files during development.)
-lambdasplit x
-ls x
ml-nlffigen to generate "lambdasplit" options for all ML files (see CM manual for what this means; it does not currently work anyway because cross-module inlining is broken). default: nothing.
-target t
-t t
Sets the target to t
(which must be one of "sparc-unix","x86-unix", or "x86-win32"). default: current architecture.
Suppress "heavy" versions of function wrappers and field accessors; also resets any earlier -heavy
to default. default: not suppressed.
suppress "light" versions of function wrappers and field accessors; also resets any earlier -light
to default. default: not suppressed
Instruct ml-nlffigen
to generated function wrappers that use named arguments (ML records) instead of tuples if there is enough information for this in the C source; (this is not always very useful). default: off.
Do not do the following: Collect enum constants from truly unnamed enumerations (those without tags that occur at toplevel or in an unnamed context, i.e., not in a typedef or another named struct or union) into a single artificial enumeration tagged by ' (single apostrohe). The corresponding ML-side representative will be a structure named E_'.
When possible (i.e., if all values of a given enumeration are different from each other), make the ML representation type of the enumeration a datatype. The default (and fallback) is to make that type the same as
-libhandle h
-lh h
Use the variable h
to refer to the handle to the shared library object. Given the constraints of CM, h must have the form of a long ML identifier, e.g., MyLibrary.libhandle.default:Library.libh.
-include f
-add f
Mention file f
in the generated .cm file. This option is necessary at least once for providing the library handle. It can be used arbitrarily many times, resulting in more than one such programmer-supplied file to be mentioned. If f is relative, then it must be relative to the directory specified in the -dir dir option.
-cmfile f
-cm f
Specify name of the generated .cm file, relative to the directory specified by the
-dir dir option. default:
-cppopt o
The string o
gets added to the list of options to be passed to cpp (the C preprocessor). The list of options gets substituted for %o in the cpp command line template.
-U x
The string
-Ux gets added to the list of cpp options.
-D x
The string
-Dx gets added to the list of cpp options.
-I x
The string
-Ix gets added to the list of cpp options.
Just write the version number of ml-nlffigen
to standard output and then quit.
-match r
-m r
ml-nlffigen will include ML definitions for a C declaration if the C declaration textually appears in one of the files specified at the command line. Definitions in #include-d files will normally not appear (unless their absence would lead to inconsistencies). By specifying -matchr , ml-nlffigen will also include definitions that occur in recursively #include-d files for which the awk-style regular expression r matches their names.
-prefix p
-p p
Generated ML structure names will all have prefix p
(in addition to the usual "S_" or "U_" or "F_" ...)
-gensym g
-g g
Names "gensym-ed" by
ml-nlffigen (for anonymous struct/union/ enums) will get an additional suffix _g. (This should be used if output from several indepdendent runs of ml-nlffigen are to coexist in the same ML program.)
Terminate processing of options, remaining arguments are taken to be C sources.


This manual page was written by Aaron Matthew Read <[email protected]>, for the Debian GNU/Linux system (but may be used by others).