Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I changed the two occurrences of return to XSRETURN, and the build succeeded

Whilst that will enable the build to succeed, it's unfortunately not the right solution.
XSRETURN() takes, as its argument, the number of elements to return from the stack. According to perldoc perlapi:
XSRETURN Return from XSUB, indicating number of items on the stack. This is u +sually handled by "xsubpp". void XSRETURN(int nitems)
I'm not sure what will happen if your version of that block of code gets executed and an attempt is made to return gsl_nan() items off the stack ... but I fully expect that it won't be pretty.
If that block of code gets executed, then it needs to XSRETURN(1), and the one item that it needs to return from the stack is whatever-it-is-that-is-returned-by gsl_nan(). (Presumably that's either a NaN, or a Math::GSL object that holds the value NaN.)

So long as that block of code never gets executed I think your fix should, however, be fine.


In reply to Re^8: Install Math::GSL fail by syphilis
in thread Install Math::GSL fail by cormanaz

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others taking refuge in the Monastery: (7)
    As of 2018-06-24 22:49 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (126 votes). Check out past polls.