isbigendian

Is the machine big or little endian?

  print "Your machins is big endian.\n" if isbigendian();

returns 1 if the machine is big endian, 0 if little endian, or dies if neither. It uses the "byteorder" element of perl's %Config array.

   my $retval = isbigendian();

trylink

a perl configure clone

  if (trylink 'libGL', '', 'char glBegin(); glBegin();', '-lGL') {
    $libs = '-lGLU -lGL';
    $have_GL = 1;
  } else {
    $have_GL = 0;
  }
  $maybe =
    trylink 'libwhatever', $inc, $body, $libs, $cflags,
        {MakeMaker=>1, Hide=>0, Clean=>1};

Try to link some C-code making up the body of a function with a given set of library specifiers

return 1 if successful, 0 otherwise

   trylink $infomsg, $include, $progbody, $libs [,$cflags,{OPTIONS}];

Takes 4 + 2 optional arguments.

• an informational message to print (can be empty)
• any commands to be included at the top of the generated C program (typically something like "#include "mylib.h"")
• the body of the program (in function main)
• library flags to use for linking. Preprocessing by MakeMaker should be performed as needed (see options and example).
• compilation flags. For example, something like "-I/usr/local/lib". Optional argument. Empty if omitted.
• OPTIONS

datatypes_switch

prints on "STDOUT" XS text for Core.xs.

generate_core_flags

prints on "STDOUT" XS text with core flags, for Core.xs.

generate_badval_init

prints on "STDOUT" XS text with badval initialisation, for Core.xs.