1Dev(3)                User Contributed Perl Documentation               Dev(3)
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NAME

6       PDL::Core::Dev - PDL development module
7

DESCRIPTION

9       This module encapsulates most of the stuff useful for PDL development
10       and is often used from within Makefile.PL's.
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SYNOPSIS

13          use PDL::Core::Dev;
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FUNCTIONS

16   isbigendian
17       Is the machine big or little endian?
18
19         print "Your machins is big endian.\n" if isbigendian();
20
21       returns 1 if the machine is big endian, 0 if little endian, or dies if
22       neither.  It uses the "byteorder" element of perl's %Config array.
23
24          my $retval = isbigendian();
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26   trylink
27       a perl configure clone
28
29         if (trylink 'libGL', '', 'char glBegin(); glBegin();', '-lGL') {
30           $libs = '-lGLU -lGL';
31           $have_GL = 1;
32         } else {
33           $have_GL = 0;
34         }
35         $maybe =
36           trylink 'libwhatever', $inc, $body, $libs, $cflags,
37               {MakeMaker=>1, Hide=>0, Clean=>1};
38
39       Try to link some C-code making up the body of a function with a given
40       set of library specifiers
41
42       return 1 if successful, 0 otherwise
43
44          trylink $infomsg, $include, $progbody, $libs [,$cflags,{OPTIONS}];
45
46       Takes 4 + 2 optional arguments.
47
48       •    an informational message to print (can be empty)
49
50       •    any commands to be included at the top of the generated C program
51            (typically something like "#include "mylib.h"")
52
53       •    the body of the program (in function main)
54
55       •    library flags to use for linking. Preprocessing by MakeMaker
56            should be performed as needed (see options and example).
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58       •    compilation flags. For example, something like "-I/usr/local/lib".
59            Optional argument. Empty if omitted.
60
61       •    OPTIONS
62
63            MakeMaker
64                Preprocess library strings in the way MakeMaker does things.
65                This is advisable to ensure that your code will actually work
66                after the link specs have been processed by MakeMaker.
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68            Hide
69                Controls if linking output etc is hidden from the user or not.
70                On by default except within the build of the PDL distribution
71                where the config value set in perldl.conf prevails.
72
73            Clean
74                Remove temporary files. Enabled by default. You might want to
75                switch it off during debugging.
76
77   generate_core_flags
78       prints on "STDOUT" XS text with core flags, for Core.xs.
79
80   got_complex_version
81         PDL::Core::Dev::got_complex_version($func_name, $num_params)
82
83       For a given function appearing in C99's "complex.h", will return a
84       boolean of whether the system being compiled on has the complex version
85       of that. E.g. for "sin", will test whether "csinl" exists (before
86       2.069, would only check for "csin", causing build failures on non-C99
87       compliant "libc" which mandates long-double versions).
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91perl v5.36.0                      2022-07-22                            Dev(3)
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