1 package ExtUtils::Mksymlists;
2 use strict qw[ subs refs ];
3 # no strict 'vars'; # until filehandles are exempted
7 # mention vars twice to prevent single-use warnings
8 @ExtUtils::Mksymlists::ISA = @ExtUtils::Mksymlists::ISA = 'Exporter';
9 @ExtUtils::Mksymlists::EXPORT = @ExtUtils::Mksymlists::EXPORT = '&Mksymlists';
10 $ExtUtils::Mksymlists::VERSION = $ExtUtils::Mksymlists::VERSION = '1.00';
15 croak("Insufficient information specified to Mksymlists")
16 unless ( $spec{NAME} or
17 ($spec{FILE} and ($spec{DL_FUNCS} or $spec{FUNCLIST})) );
19 $spec{DL_VARS} = [] unless $spec{DL_VARS};
20 ($spec{FILE} = $spec{NAME}) =~ s/.*::// unless $spec{FILE};
21 $spec{DL_FUNCS} = { $spec{NAME} => [] }
22 unless ( ($spec{DL_FUNCS} and keys %{$spec{DL_FUNCS}}) or
24 $spec{FUNCLIST} = [] unless $spec{FUNCLIST};
25 if (defined $spec{DL_FUNCS}) {
27 foreach $package (keys %{$spec{DL_FUNCS}}) {
28 my($packprefix,$sym,$bootseen);
29 ($packprefix = $package) =~ s/\W/_/g;
30 foreach $sym (@{$spec{DL_FUNCS}->{$package}}) {
31 if ($sym =~ /^boot_/) {
32 push(@{$spec{FUNCLIST}},$sym);
35 else { push(@{$spec{FUNCLIST}},"XS_${packprefix}_$sym"); }
37 push(@{$spec{FUNCLIST}},"boot_$packprefix") unless $bootseen;
41 # We'll need this if we ever add any OS which uses mod2fname
43 if (defined &DynaLoader::mod2fname and not $spec{DLBASE}) {
44 $spec{DLBASE} = DynaLoader::mod2fname([ split(/::/,$spec{NAME}) ]);
47 if ($^O eq 'aix') { _write_aix(\%spec); }
48 elsif ($^O eq 'VMS') { _write_vms(\%spec) }
49 elsif ($^O eq 'os2') { _write_os2(\%spec) }
50 else { croak("Don't know how to create linker option file for $^O\n"); }
57 rename "$data->{FILE}.exp", "$data->{FILE}.exp_old";
59 open(EXP,">$data->{FILE}.exp")
60 or croak("Can't create $data->{FILE}.exp: $!\n");
61 print EXP join("\n",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
62 print EXP join("\n",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
70 if (not $data->{DLBASE}) {
71 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
72 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
74 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
76 open(DEF,">$data->{FILE}.def")
77 or croak("Can't create $data->{FILE}.def: $!\n");
78 print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n";
79 print DEF "CODE LOADONCALL\n";
80 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
81 print DEF "EXPORTS\n ";
82 print DEF join("\n ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
83 print DEF join("\n ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
84 if (%{$data->{IMPORTS}}) {
85 print DEF "IMPORTS\n";
87 while (($name, $exp)= each %{$data->{IMPORTS}}) {
88 print DEF " $name=$exp\n";
100 my($isvax) = $Config::Config{'arch'} =~ /VAX/i;
103 rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";
105 open(OPT,">$data->{FILE}.opt")
106 or croak("Can't create $data->{FILE}.opt: $!\n");
108 # Options file declaring universal symbols
109 # Used when linking shareable image for dynamic extension,
110 # or when linking PerlShr into which we've added this package
111 # as a static extension
112 # We don't do anything to preserve order, so we won't relax
113 # the GSMATCH criteria for a dynamic extension
115 foreach $sym (@{$data->{FUNCLIST}}) {
116 if ($isvax) { print OPT "UNIVERSAL=$sym\n" }
117 else { print OPT "SYMBOL_VECTOR=($sym=PROCEDURE)\n"; }
119 foreach $sym (@{$data->{DL_VARS}}) {
120 print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
121 if ($isvax) { print OPT "UNIVERSAL=$sym\n" }
122 else { print OPT "SYMBOL_VECTOR=($sym=DATA)\n"; }
126 # Options file specifying RTLs to which this extension must be linked.
127 # Eventually, the list of libraries will be supplied by a working
128 # extliblist routine.
129 open OPT,'>rtls.opt';
130 print OPT "PerlShr/Share\n";
131 foreach $rtl (split(/\s+/,$Config::Config{'libs'})) { print OPT "$rtl\n"; }
141 ExtUtils::Mksymlists - write linker options files for dynamic extension
145 use ExtUtils::Mksymlists;
146 Mksymlists({ NAME => $name ,
147 DL_VARS => [ $var1, $var2, $var3 ],
148 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
149 $pkg2 => [ $func3 ] });
153 C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
154 during the creation of shared libraries for synamic extensions. It is
155 normally called from a MakeMaker-generated Makefile when the extension
156 is built. The linker option file is generated by calling the function
157 C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
158 It takes one argument, a list of key-value pairs, in which the following
163 This gives the name of the extension (I<e.g.> Tk::Canvas) for which
164 the linker option file will be produced.
168 This is identical to the DL_FUNCS attribute available via MakeMaker,
169 from which it is usually taken. Its value is a reference to an
170 associative array, in which each key is the name of a package, and
171 each value is an a reference to an array of function names which
172 should be exported by the extension. For instance, one might say
173 C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
174 Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The
175 function names should be identical to those in the XSUB code;
176 C<Mksymlists> will alter the names written to the linker option
177 file to match the changes made by F<xsubpp>. In addition, if
178 none of the functions in a list begin with the string B<boot_>,
179 C<Mksymlists> will add a bootstrap function for that package,
180 just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is
181 present in the list, it is passed through unchanged.) If
182 DL_FUNCS is not specified, it defaults to the bootstrap
183 function for the extension specified in NAME.
187 This is identical to the DL_VARS attribute available via MakeMaker,
188 and, like DL_FUNCS, it is usually specified via MakeMaker. Its
189 value is a reference to an array of variable names which should
190 be exported by the extension.
194 This key can be used to specify the name of the linker option file
195 (minus the OS-specific extension), if for some reason you do not
196 want to use the default value, which is the last word of the NAME
197 attribute (I<e.g.> for Tk::Canvas, FILE defaults to 'Canvas').
201 This provides an alternate means to specify function names to be
202 exported from the extension. Its value is a reference to an
203 array of function names to be exported by the extension. These
204 names are passed through unaltered to the linker options file.
208 This item specifies the name by which the linker knows the
209 extension, which may be different from the name of the
210 extension itself (for instance, some linkers add an '_' to the
211 name of the extension). If it is not specified, it is derived
212 from the NAME attribute. It is presently used only by OS2.
214 When calling C<Mksymlists>, one should always specify the NAME
215 attribute. In most cases, this is all that's necessary. In
216 the case of unusual extensions, however, the other attributes
217 can be used to provide additional information to the linker.
221 Charles Bailey I<E<lt>bailey@genetics.upenn.eduE<gt>>
225 Last revised 14-Feb-1996, for Perl 5.002.