NAME
XS::Tutorial - documentation with examples for learning Perl XS
XS::Tutorial::One - how to pass to and return basic values from C functions
XS::Tutorial::Two - working with more than one value at a time
XS::Tutorial::Three - utility routines that are good to know
SOURCES OF INFORMATION
XS Mechanics by Steven W. McDougall
A clear introduction to XS programming.
Extending and Embedding Perl (Manning) by Simon Cozens and Tim Jenness
A thorough introduction, with many examples. Outdated in parts (mostly data structures) but still an excellent reference.
perldoc
perlxs: syntax of xsubs
perlapi : C macros used to interact with Perl data structures (and the interpreter)
perlguts: Perl data structures
perlxstypemap: typemap syntax (translating C types into Perl)
perlcall: how to call Perl subroutines and methods from XS
perlxstut: another XS tutorial
ExtUtils::MakeMaker
The documentation explains all of the options in Makefile.PL. Useful if you need to pass additional flags or options to the C compiler.
ppport.h
A header file, needed for compatibility across Perl versions. See Devel::PPPort.
Perl source code
if you can’t find an answer in documentation, grep the source.