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XSUBPP(1)	       Perl Programmers	Reference Guide		     XSUBPP(1)

       xsubpp -	compiler to convert Perl XS code into C	code

       xsubpp [-v] [-except] [-s pattern] [-prototypes]	[-noversioncheck]
       [-nolinenumbers]	[-nooptimize] [-typemap	typemap] [-output filename]...

       This compiler is	typically run by the makefiles created by
       ExtUtils::MakeMaker or by Module::Build or other	Perl module build

       xsubpp will compile XS code into	C code by embedding the	constructs
       necessary to let	C functions manipulate Perl values and creates the
       glue necessary to let Perl access those functions.  The compiler	uses
       typemaps	to determine how to map	C function parameters and variables to
       Perl values.

       The compiler will search	for typemap files called typemap.  It will use
       the following search path to find default typemaps, with	the rightmost
       typemap taking precedence.


       It will also use	a default typemap installed as "ExtUtils::typemap".

       Note that the "XSOPT" MakeMaker option may be used to add these options
       to any makefiles	generated by MakeMaker.

	    Retains '::' in type names so that C++ hierarchical	types can be

	    Adds exception handling stubs to the C code.

       -typemap	typemap
	    Indicates that a user-supplied typemap should take precedence over
	    the	default	typemaps.  This	option may be used multiple times,
	    with the last typemap having the highest precedence.

       -output filename
	    Specifies the name of the output file to generate.	If no file is
	    specified, output will be written to standard output.

       -v   Prints the xsubpp version number to	standard output, then exits.

	    By default xsubpp will not automatically generate prototype	code
	    for	all xsubs. This	flag will enable prototypes.

	    Disables the run time test that determines if the object file
	    (derived from the ".xs" file) and the ".pm"	files have the same
	    version number.

	    Prevents the inclusion of '#line' directives in the	output.

	    Disables certain optimizations.  The only optimization that	is
	    currently affected is the use of targets by	the output C code (see
	    perlguts).	This may significantly slow down the generated code,
	    but	this is	the way	xsubpp of 5.005	and earlier operated.

	    Disable recognition	of "IN", "OUT_LIST" and	"INOUT_LIST"

	    Disable recognition	of ANSI-like descriptions of function

       -C++ Currently doesn't do anything at all.  This	flag has been a	no-op
	    for	many versions of perl, at least	as far back as perl5.003_07.
	    It's allowed here for backwards compatibility.

       -s=... or -strip=...
	    This option	is obscure and discouraged.

	    If specified, the given string will	be stripped off	from the
	    beginning of the C function	name in	the generated XS functions (if
	    it starts with that	prefix).  This only applies to XSUBs without
	    "CODE" or "PPCODE" blocks.	For example, the XS:

	      void foo_bar(int i);

	    when "xsubpp" is invoked with "-s foo_" will install a "foo_bar"
	    function in	Perl, but really call bar(i) in	C. Most	of the time,
	    this is the	opposite of what you want and failure modes are
	    somewhat obscure, so please	avoid this option where	possible.

       No environment variables	are used.

       Originally by Larry Wall.  Turned into the "ExtUtils::ParseXS" module
       by Ken Williams.

       See the file Changes.

       perl(1),	perlxs(1), perlxstut(1), ExtUtils::ParseXS

perl v5.28.3			  2021-03-01			     XSUBPP(1)


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