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 \"$data->{DLBASE}\"\n";
115 print DEF "CODE LOADONCALL\n";
116 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
118 print DEF "EXPORTS\n ";
120 # Export public symbols both with and without underscores to
121 # ensure compatibility between DLLs from different compilers
122 # NOTE: DynaLoader itself only uses the names without underscores,
123 # so this is only to cover the case when the extension DLL may be
124 # linked to directly from C. GSAR 97-07-10
125 if ($Config::Config{'cc'} =~ /^bcc/i) {
126 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
127 push @syms, "_$_", "$_ = _$_";
131 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
132 push @syms, "$_", "_$_ = $_";
135 print DEF join("\n ",@syms, "\n") if @syms;
136 if (%{$data->{IMPORTS}}) {
137 print DEF "IMPORTS\n";
139 while (($name, $exp)= each %{$data->{IMPORTS}}) {
140 print DEF " $name=$exp\n";
150 require Config; # a reminder for once we do $^O
151 require ExtUtils::XSSymSet;
153 my($isvax) = $Config::Config{'arch'} =~ /VAX/i;
154 my($set) = new ExtUtils::XSSymSet;
157 rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";
159 open(OPT,">$data->{FILE}.opt")
160 or croak("Can't create $data->{FILE}.opt: $!\n");
162 # Options file declaring universal symbols
163 # Used when linking shareable image for dynamic extension,
164 # or when linking PerlShr into which we've added this package
165 # as a static extension
166 # We don't do anything to preserve order, so we won't relax
167 # the GSMATCH criteria for a dynamic extension
169 foreach $sym (@{$data->{FUNCLIST}}) {
170 my $safe = $set->addsym($sym);
171 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
172 else { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; }
174 foreach $sym (@{$data->{DL_VARS}}) {
175 my $safe = $set->addsym($sym);
176 print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
177 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
178 else { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; }
190 ExtUtils::Mksymlists - write linker options files for dynamic extension
194 use ExtUtils::Mksymlists;
195 Mksymlists({ NAME => $name ,
196 DL_VARS => [ $var1, $var2, $var3 ],
197 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
198 $pkg2 => [ $func3 ] });
202 C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
203 during the creation of shared libraries for dynamic extensions. It is
204 normally called from a MakeMaker-generated Makefile when the extension
205 is built. The linker option file is generated by calling the function
206 C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
207 It takes one argument, a list of key-value pairs, in which the following
214 This gives the name of the extension (I<e.g.> Tk::Canvas) for which
215 the linker option file will be produced.
219 This is identical to the DL_FUNCS attribute available via MakeMaker,
220 from which it is usually taken. Its value is a reference to an
221 associative array, in which each key is the name of a package, and
222 each value is an a reference to an array of function names which
223 should be exported by the extension. For instance, one might say
224 C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
225 Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The
226 function names should be identical to those in the XSUB code;
227 C<Mksymlists> will alter the names written to the linker option
228 file to match the changes made by F<xsubpp>. In addition, if
229 none of the functions in a list begin with the string B<boot_>,
230 C<Mksymlists> will add a bootstrap function for that package,
231 just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is
232 present in the list, it is passed through unchanged.) If
233 DL_FUNCS is not specified, it defaults to the bootstrap
234 function for the extension specified in NAME.
238 This is identical to the DL_VARS attribute available via MakeMaker,
239 and, like DL_FUNCS, it is usually specified via MakeMaker. Its
240 value is a reference to an array of variable names which should
241 be exported by the extension.
245 This key can be used to specify the name of the linker option file
246 (minus the OS-specific extension), if for some reason you do not
247 want to use the default value, which is the last word of the NAME
248 attribute (I<e.g.> for Tk::Canvas, FILE defaults to 'Canvas').
252 This provides an alternate means to specify function names to be
253 exported from the extension. Its value is a reference to an
254 array of function names to be exported by the extension. These
255 names are passed through unaltered to the linker options file.
259 This item specifies the name by which the linker knows the
260 extension, which may be different from the name of the
261 extension itself (for instance, some linkers add an '_' to the
262 name of the extension). If it is not specified, it is derived
263 from the NAME attribute. It is presently used only by OS2.
267 When calling C<Mksymlists>, one should always specify the NAME
268 attribute. In most cases, this is all that's necessary. In
269 the case of unusual extensions, however, the other attributes
270 can be used to provide additional information to the linker.
274 Charles Bailey I<E<lt>bailey@genetics.upenn.eduE<gt>>
278 Last revised 14-Feb-1996, for Perl 5.002.