%
You can safely ignore the line about "prototyping behavior" - it is
-explained in the section "The PROTOTYPES: Keyword" in L<perlxs>.
+explained in L<perlxs/"The PROTOTYPES: Keyword">.
If you are on a Win32 system, and the build process fails with linker
errors for functions in the C library, check if your Perl is configured
semicolon.
The list of output parameters occurs at the very end of the function, just
-before after the OUTPUT: directive. The use of RETVAL tells Perl that you
+after the OUTPUT: directive. The use of RETVAL tells Perl that you
wish to send this value back as the return value of the XSUB function. In
Example 3, we wanted the "return value" placed in the original variable
which we passed in, so we listed it (and not RETVAL) in the OUTPUT: section.
next to the variable name and away from the variable type), and place a
"*" near the variable type, but away from the variable name (as in the
call to foo above). By doing so, it is easy to understand exactly what
-will be passed to the C function -- it will be whatever is in the "last
+will be passed to the C function; it will be whatever is in the "last
column".
You should take great pains to try to pass the function the type of variable