xsubpp
compiler to convert Perl XS code into C code
see also :
perl
Synopsis
xsubpp
[-v] [-except] [-s
pattern] [-prototypes]
[-noversioncheck] [-nolinenumbers]
[-nooptimize] [-typemap typemap]
[-output filename]... file.xs
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description
This compiler
is typically run by the makefiles created by
ExtUtils::MakeMaker.
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.
../../../typemap:../../typemap:../typemap:typemap
It will also
use a default typemap installed as
"ExtUtils::typemap".
options
Note that the
"XSOPT" MakeMaker option may be used to
add these options to any makefiles generated by MakeMaker.
-hiertype
Retains ’::’ in
type names so that C ++ hierarchical types
can be mapped.
-except
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.
-prototypes
By default xsubpp will
not automatically generate prototype code for all xsubs.
This flag will enable prototypes.
-noversioncheck
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.
-nolinenumbers
Prevents the inclusion of
’#line’ directives in the output.
-nooptimize
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.
-noinout
Disable recognition of
"IN", "OUT_LIST" and
"INOUT_LIST" declarations.
-noargtypes
Disable recognition of
ANSI-like descriptions of function signature.
-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.
environment
No environment variables are used.
modification history
See the file Changes.
see also
perl ,
perlxs, perlxstut, ExtUtils::ParseXS
author
Originally by
Larry Wall. Turned into the
"ExtUtils::ParseXS" module by Ken
Williams.