1 package ExtUtils::Mksymlists;
2 use strict qw[ subs refs ];
3 # no strict 'vars'; # until filehandles are exempted
7 use vars qw( @ISA @EXPORT $VERSION );
9 @EXPORT = '&Mksymlists';
10 $VERSION = substr q$Revision: 1.17 $, 10;
16 croak("Insufficient information specified to Mksymlists")
17 unless ( $spec{NAME} or
18 ($spec{FILE} and ($spec{DL_FUNCS} or $spec{FUNCLIST})) );
20 $spec{DL_VARS} = [] unless $spec{DL_VARS};
21 ($spec{FILE} = $spec{NAME}) =~ s/.*::// unless $spec{FILE};
22 $spec{DL_FUNCS} = { $spec{NAME} => [] }
23 unless ( ($spec{DL_FUNCS} and keys %{$spec{DL_FUNCS}}) or
25 $spec{FUNCLIST} = [] unless $spec{FUNCLIST};
26 if (defined $spec{DL_FUNCS}) {
28 foreach $package (keys %{$spec{DL_FUNCS}}) {
29 my($packprefix,$sym,$bootseen);
30 ($packprefix = $package) =~ s/\W/_/g;
31 foreach $sym (@{$spec{DL_FUNCS}->{$package}}) {
32 if ($sym =~ /^boot_/) {
33 push(@{$spec{FUNCLIST}},$sym);
36 else { push(@{$spec{FUNCLIST}},"XS_${packprefix}_$sym"); }
38 push(@{$spec{FUNCLIST}},"boot_$packprefix") unless $bootseen;
42 # We'll need this if we ever add any OS which uses mod2fname
43 # not as pseudo-builtin.
45 if (defined &DynaLoader::mod2fname and not $spec{DLBASE}) {
46 $spec{DLBASE} = DynaLoader::mod2fname([ split(/::/,$spec{NAME}) ]);
49 if ($osname eq 'aix') { _write_aix(\%spec); }
50 elsif ($osname eq 'VMS') { _write_vms(\%spec) }
51 elsif ($osname eq 'os2') { _write_os2(\%spec) }
52 elsif ($osname eq 'MSWin32') { _write_win32(\%spec) }
53 else { croak("Don't know how to create linker option file for $osname\n"); }
60 rename "$data->{FILE}.exp", "$data->{FILE}.exp_old";
62 open(EXP,">$data->{FILE}.exp")
63 or croak("Can't create $data->{FILE}.exp: $!\n");
64 print EXP join("\n",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
65 print EXP join("\n",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
73 my $threaded = ($Config::Config{archname} =~ /-thread/ ? " threaded" : "");
75 if (not $data->{DLBASE}) {
76 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
77 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
79 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
81 open(DEF,">$data->{FILE}.def")
82 or croak("Can't create $data->{FILE}.def: $!\n");
83 print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n";
84 print DEF "DESCRIPTION 'Perl (v$]$threaded) module $data->{NAME} v$data->{VERSION}'\n";
85 print DEF "CODE LOADONCALL\n";
86 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
87 print DEF "EXPORTS\n ";
88 print DEF join("\n ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
89 print DEF join("\n ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
90 if (%{$data->{IMPORTS}}) {
91 print DEF "IMPORTS\n";
93 while (($name, $exp)= each %{$data->{IMPORTS}}) {
94 print DEF " $name=$exp\n";
104 if (not $data->{DLBASE}) {
105 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
106 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
108 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
110 open(DEF,">$data->{FILE}.def")
111 or croak("Can't create $data->{FILE}.def: $!\n");
112 # put library name in quotes (it could be a keyword, like 'Alias')
113 if ($Config::Config{'cc'} !~ /^gcc/i) {
114 print DEF "LIBRARY \"$data->{DLBASE}\"\n";
115 if ($Config{'ccflags'} !~ /PERL_OBJECT/i) {
116 print DEF "CODE LOADONCALL\n";
117 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
120 print DEF "EXPORTS\n ";
122 # Export public symbols both with and without underscores to
123 # ensure compatibility between DLLs from different compilers
124 # NOTE: DynaLoader itself only uses the names without underscores,
125 # so this is only to cover the case when the extension DLL may be
126 # linked to directly from C. GSAR 97-07-10
127 if ($Config::Config{'cc'} =~ /^bcc/i) {
128 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
129 push @syms, "_$_", "$_ = _$_";
133 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
134 push @syms, "$_", "_$_ = $_";
137 print DEF join("\n ",@syms, "\n") if @syms;
138 if (%{$data->{IMPORTS}}) {
139 print DEF "IMPORTS\n";
141 while (($name, $exp)= each %{$data->{IMPORTS}}) {
142 print DEF " $name=$exp\n";
152 require Config; # a reminder for once we do $^O
153 require ExtUtils::XSSymSet;
155 my($isvax) = $Config::Config{'arch'} =~ /VAX/i;
156 my($set) = new ExtUtils::XSSymSet;
159 rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";
161 open(OPT,">$data->{FILE}.opt")
162 or croak("Can't create $data->{FILE}.opt: $!\n");
164 # Options file declaring universal symbols
165 # Used when linking shareable image for dynamic extension,
166 # or when linking PerlShr into which we've added this package
167 # as a static extension
168 # We don't do anything to preserve order, so we won't relax
169 # the GSMATCH criteria for a dynamic extension
171 foreach $sym (@{$data->{FUNCLIST}}) {
172 my $safe = $set->addsym($sym);
173 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
174 else { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; }
176 foreach $sym (@{$data->{DL_VARS}}) {
177 my $safe = $set->addsym($sym);
178 print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
179 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
180 else { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; }
184 # Options file specifying RTLs to which this extension must be linked.
185 # Eventually, the list of libraries will be supplied by a working
186 # extliblist routine.
187 open OPT,'>rtls.opt';
188 print OPT "PerlShr/Share\n";
189 foreach $rtl (split(/\s+/,$Config::Config{'libs'})) { print OPT "$rtl\n"; }
199 ExtUtils::Mksymlists - write linker options files for dynamic extension
203 use ExtUtils::Mksymlists;
204 Mksymlists({ NAME => $name ,
205 DL_VARS => [ $var1, $var2, $var3 ],
206 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
207 $pkg2 => [ $func3 ] });
211 C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
212 during the creation of shared libraries for dynamic extensions. It is
213 normally called from a MakeMaker-generated Makefile when the extension
214 is built. The linker option file is generated by calling the function
215 C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
216 It takes one argument, a list of key-value pairs, in which the following
223 This gives the name of the extension (I<e.g.> Tk::Canvas) for which
224 the linker option file will be produced.
228 This is identical to the DL_FUNCS attribute available via MakeMaker,
229 from which it is usually taken. Its value is a reference to an
230 associative array, in which each key is the name of a package, and
231 each value is an a reference to an array of function names which
232 should be exported by the extension. For instance, one might say
233 C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
234 Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The
235 function names should be identical to those in the XSUB code;
236 C<Mksymlists> will alter the names written to the linker option
237 file to match the changes made by F<xsubpp>. In addition, if
238 none of the functions in a list begin with the string B<boot_>,
239 C<Mksymlists> will add a bootstrap function for that package,
240 just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is
241 present in the list, it is passed through unchanged.) If
242 DL_FUNCS is not specified, it defaults to the bootstrap
243 function for the extension specified in NAME.
247 This is identical to the DL_VARS attribute available via MakeMaker,
248 and, like DL_FUNCS, it is usually specified via MakeMaker. Its
249 value is a reference to an array of variable names which should
250 be exported by the extension.
254 This key can be used to specify the name of the linker option file
255 (minus the OS-specific extension), if for some reason you do not
256 want to use the default value, which is the last word of the NAME
257 attribute (I<e.g.> for Tk::Canvas, FILE defaults to 'Canvas').
261 This provides an alternate means to specify function names to be
262 exported from the extension. Its value is a reference to an
263 array of function names to be exported by the extension. These
264 names are passed through unaltered to the linker options file.
268 This item specifies the name by which the linker knows the
269 extension, which may be different from the name of the
270 extension itself (for instance, some linkers add an '_' to the
271 name of the extension). If it is not specified, it is derived
272 from the NAME attribute. It is presently used only by OS2.
276 When calling C<Mksymlists>, one should always specify the NAME
277 attribute. In most cases, this is all that's necessary. In
278 the case of unusual extensions, however, the other attributes
279 can be used to provide additional information to the linker.
283 Charles Bailey I<E<lt>bailey@genetics.upenn.eduE<gt>>
287 Last revised 14-Feb-1996, for Perl 5.002.