1 package ExtUtils::Mksymlists;
4 use strict qw[ subs refs ];
5 # no strict 'vars'; # until filehandles are exempted
9 our(@ISA, @EXPORT, $VERSION);
11 @EXPORT = '&Mksymlists';
12 $VERSION = substr q$Revision: 1.17 $, 10;
18 croak("Insufficient information specified to Mksymlists")
19 unless ( $spec{NAME} or
20 ($spec{FILE} and ($spec{DL_FUNCS} or $spec{FUNCLIST})) );
22 $spec{DL_VARS} = [] unless $spec{DL_VARS};
23 ($spec{FILE} = $spec{NAME}) =~ s/.*::// unless $spec{FILE};
24 $spec{FUNCLIST} = [] unless $spec{FUNCLIST};
25 $spec{DL_FUNCS} = { $spec{NAME} => [] }
26 unless ( ($spec{DL_FUNCS} and keys %{$spec{DL_FUNCS}}) or
28 if (defined $spec{DL_FUNCS}) {
30 foreach $package (keys %{$spec{DL_FUNCS}}) {
31 my($packprefix,$sym,$bootseen);
32 ($packprefix = $package) =~ s/\W/_/g;
33 foreach $sym (@{$spec{DL_FUNCS}->{$package}}) {
34 if ($sym =~ /^boot_/) {
35 push(@{$spec{FUNCLIST}},$sym);
38 else { push(@{$spec{FUNCLIST}},"XS_${packprefix}_$sym"); }
40 push(@{$spec{FUNCLIST}},"boot_$packprefix") unless $bootseen;
44 # We'll need this if we ever add any OS which uses mod2fname
45 # not as pseudo-builtin.
47 if (defined &DynaLoader::mod2fname and not $spec{DLBASE}) {
48 $spec{DLBASE} = DynaLoader::mod2fname([ split(/::/,$spec{NAME}) ]);
51 if ($osname eq 'aix') { _write_aix(\%spec); }
52 elsif ($osname eq 'VMS') { _write_vms(\%spec) }
53 elsif ($osname eq 'os2') { _write_os2(\%spec) }
54 elsif ($osname eq 'MSWin32') { _write_win32(\%spec) }
55 else { croak("Don't know how to create linker option file for $osname\n"); }
62 rename "$data->{FILE}.exp", "$data->{FILE}.exp_old";
64 open(EXP,">$data->{FILE}.exp")
65 or croak("Can't create $data->{FILE}.exp: $!\n");
66 print EXP join("\n",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
67 print EXP join("\n",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
75 my $threaded = ($Config::Config{archname} =~ /-thread/ ? " threaded" : "");
77 if (not $data->{DLBASE}) {
78 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
79 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
81 my $distname = $data->{DISTNAME} || $data->{NAME};
82 $distname = "Distribution $distname";
83 my $comment = "Perl (v$Config::Config{version}$threaded) module $data->{NAME}";
84 if ($data->{INSTALLDIRS} and $data->{INSTALLDIRS} eq 'perl') {
85 $distname = 'perl5-porters@perl.org';
86 $comment = "Core $comment";
88 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
90 open(DEF,">$data->{FILE}.def")
91 or croak("Can't create $data->{FILE}.def: $!\n");
92 print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n";
93 print DEF "DESCRIPTION '\@#$distname:$data->{VERSION}#\@ $comment'\n";
94 print DEF "CODE LOADONCALL\n";
95 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
96 print DEF "EXPORTS\n ";
97 print DEF join("\n ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
98 print DEF join("\n ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
99 if (%{$data->{IMPORTS}}) {
100 print DEF "IMPORTS\n";
102 while (($name, $exp)= each %{$data->{IMPORTS}}) {
103 print DEF " $name=$exp\n";
113 if (not $data->{DLBASE}) {
114 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
115 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
117 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
119 open(DEF,">$data->{FILE}.def")
120 or croak("Can't create $data->{FILE}.def: $!\n");
121 # put library name in quotes (it could be a keyword, like 'Alias')
122 if ($Config::Config{'cc'} !~ /^gcc/i) {
123 print DEF "LIBRARY \"$data->{DLBASE}\"\n";
125 print DEF "EXPORTS\n ";
127 # Export public symbols both with and without underscores to
128 # ensure compatibility between DLLs from different compilers
129 # NOTE: DynaLoader itself only uses the names without underscores,
130 # so this is only to cover the case when the extension DLL may be
131 # linked to directly from C. GSAR 97-07-10
132 if ($Config::Config{'cc'} =~ /^bcc/i) {
133 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
134 push @syms, "_$_", "$_ = _$_";
138 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
139 push @syms, "$_", "_$_ = $_";
142 print DEF join("\n ",@syms, "\n") if @syms;
143 if (%{$data->{IMPORTS}}) {
144 print DEF "IMPORTS\n";
146 while (($name, $exp)= each %{$data->{IMPORTS}}) {
147 print DEF " $name=$exp\n";
157 require Config; # a reminder for once we do $^O
158 require ExtUtils::XSSymSet;
160 my($isvax) = $Config::Config{'arch'} =~ /VAX/i;
161 my($set) = new ExtUtils::XSSymSet;
164 rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";
166 open(OPT,">$data->{FILE}.opt")
167 or croak("Can't create $data->{FILE}.opt: $!\n");
169 # Options file declaring universal symbols
170 # Used when linking shareable image for dynamic extension,
171 # or when linking PerlShr into which we've added this package
172 # as a static extension
173 # We don't do anything to preserve order, so we won't relax
174 # the GSMATCH criteria for a dynamic extension
176 foreach $sym (@{$data->{FUNCLIST}}) {
177 my $safe = $set->addsym($sym);
178 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
179 else { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; }
181 foreach $sym (@{$data->{DL_VARS}}) {
182 my $safe = $set->addsym($sym);
183 print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
184 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
185 else { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; }
197 ExtUtils::Mksymlists - write linker options files for dynamic extension
201 use ExtUtils::Mksymlists;
202 Mksymlists({ NAME => $name ,
203 DL_VARS => [ $var1, $var2, $var3 ],
204 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
205 $pkg2 => [ $func3 ] });
209 C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
210 during the creation of shared libraries for dynamic extensions. It is
211 normally called from a MakeMaker-generated Makefile when the extension
212 is built. The linker option file is generated by calling the function
213 C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
214 It takes one argument, a list of key-value pairs, in which the following
221 This item specifies the name by which the linker knows the
222 extension, which may be different from the name of the
223 extension itself (for instance, some linkers add an '_' to the
224 name of the extension). If it is not specified, it is derived
225 from the NAME attribute. It is presently used only by OS2 and Win32.
229 This is identical to the DL_FUNCS attribute available via MakeMaker,
230 from which it is usually taken. Its value is a reference to an
231 associative array, in which each key is the name of a package, and
232 each value is an a reference to an array of function names which
233 should be exported by the extension. For instance, one might say
234 C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
235 Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The
236 function names should be identical to those in the XSUB code;
237 C<Mksymlists> will alter the names written to the linker option
238 file to match the changes made by F<xsubpp>. In addition, if
239 none of the functions in a list begin with the string B<boot_>,
240 C<Mksymlists> will add a bootstrap function for that package,
241 just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is
242 present in the list, it is passed through unchanged.) If
243 DL_FUNCS is not specified, it defaults to the bootstrap
244 function for the extension specified in NAME.
248 This is identical to the DL_VARS attribute available via MakeMaker,
249 and, like DL_FUNCS, it is usually specified via MakeMaker. Its
250 value is a reference to an array of variable names which should
251 be exported by the extension.
255 This key can be used to specify the name of the linker option file
256 (minus the OS-specific extension), if for some reason you do not
257 want to use the default value, which is the last word of the NAME
258 attribute (I<e.g.> for C<Tk::Canvas>, FILE defaults to C<Canvas>).
262 This provides an alternate means to specify function names to be
263 exported from the extension. Its value is a reference to an
264 array of function names to be exported by the extension. These
265 names are passed through unaltered to the linker options file.
266 Specifying a value for the FUNCLIST attribute suppresses automatic
267 generation of the bootstrap function for the package. To still create
268 the bootstrap name you have to specify the package name in the
271 Mksymlists({ NAME => $name ,
272 FUNCLIST => [ $func1, $func2 ],
273 DL_FUNCS => { $pkg => [] } });
278 This attribute is used to specify names to be imported into the
279 extension. It is currently only used by OS/2 and Win32.
283 This gives the name of the extension (I<e.g.> C<Tk::Canvas>) for which
284 the linker option file will be produced.
288 When calling C<Mksymlists>, one should always specify the NAME
289 attribute. In most cases, this is all that's necessary. In
290 the case of unusual extensions, however, the other attributes
291 can be used to provide additional information to the linker.
295 Charles Bailey I<E<lt>bailey@newman.upenn.eduE<gt>>
299 Last revised 14-Feb-1996, for Perl 5.002.