1ExtUtils::Mksymlists(3pmP)erl Programmers Reference GuidEextUtils::Mksymlists(3pm)
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6 ExtUtils::Mksymlists - write linker options files for dynamic extension
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9 use ExtUtils::Mksymlists;
10 Mksymlists({ NAME => $name ,
11 DL_VARS => [ $var1, $var2, $var3 ],
12 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
13 $pkg2 => [ $func3 ] });
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16 "ExtUtils::Mksymlists" produces files used by the linker under some OSs
17 during the creation of shared libraries for dynamic extensions. It is
18 normally called from a MakeMaker-generated Makefile when the extension
19 is built. The linker option file is generated by calling the function
20 "Mksymlists", which is exported by default from "ExtUtils::Mksymlists".
21 It takes one argument, a list of key-value pairs, in which the
22 following keys are recognized:
23 DLBASE
25 This item specifies the name by which the linker knows the
26 extension, which may be different from the name of the extension
27 itself (for instance, some linkers add an '_' to the name of the
28 extension). If it is not specified, it is derived from the NAME
29 attribute. It is presently used only by OS2 and Win32.
30 DL_FUNCS
32 This is identical to the DL_FUNCS attribute available via
33 MakeMaker, from which it is usually taken. Its value is a
34 reference to an associative array, in which each key is the name of
35 a package, and each value is an a reference to an array of function
36 names which should be exported by the extension. For instance, one
37 might say "DL_FUNCS => { Homer::Iliad => [ qw(trojans greeks) ],
38 Homer::Odyssey => [ qw(travellers family suitors) ] }". The
39 function names should be identical to those in the XSUB code;
40 "Mksymlists" will alter the names written to the linker option file
41 to match the changes made by xsubpp. In addition, if none of the
42 functions in a list begin with the string boot_, "Mksymlists" will
43 add a bootstrap function for that package, just as xsubpp does.
44 (If a boot_<pkg> function is present in the list, it is passed
45 through unchanged.) If DL_FUNCS is not specified, it defaults to
46 the bootstrap function for the extension specified in NAME.
47 DL_VARS
49 This is identical to the DL_VARS attribute available via MakeMaker,
50 and, like DL_FUNCS, it is usually specified via MakeMaker. Its
51 value is a reference to an array of variable names which should be
52 exported by the extension.
53 FILE
55 This key can be used to specify the name of the linker option file
56 (minus the OS-specific extension), if for some reason you do not
57 want to use the default value, which is the last word of the NAME
58 attribute (e.g. for "Tk::Canvas", FILE defaults to "Canvas").
59 FUNCLIST
61 This provides an alternate means to specify function names to be
62 exported from the extension. Its value is a reference to an array
63 of function names to be exported by the extension. These names are
64 passed through unaltered to the linker options file. Specifying a
65 value for the FUNCLIST attribute suppresses automatic generation of
66 the bootstrap function for the package. To still create the
67 bootstrap name you have to specify the package name in the DL_FUNCS
68 hash:
69 Mksymlists({ NAME => $name ,
71 FUNCLIST => [ $func1, $func2 ],
72 DL_FUNCS => { $pkg => [] } });
73 IMPORTS
75 This attribute is used to specify names to be imported into the
76 extension. It is currently only used by OS/2 and Win32.
77 NAME
79 This gives the name of the extension (e.g. "Tk::Canvas") for which
80 the linker option file will be produced.
81 When calling "Mksymlists", one should always specify the NAME
83 attribute. In most cases, this is all that's necessary. In the case
84 of unusual extensions, however, the other attributes can be used to
85 provide additional information to the linker.
86
88 Charles Bailey <bailey@newman.upenn.edu>
89
91 Last revised 14-Feb-1996, for Perl 5.002.
92perl v5.10.1 2009-08-05 ExtUtils::Mksymlists(3pm)