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: 1.16 $, 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 if (not $data->{DLBASE}) {
74 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
75 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
77 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
79 open(DEF,">$data->{FILE}.def")
80 or croak("Can't create $data->{FILE}.def: $!\n");
81 print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n";
82 print DEF "CODE LOADONCALL\n";
83 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
84 print DEF "EXPORTS\n ";
85 print DEF join("\n ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
86 print DEF join("\n ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
87 if (%{$data->{IMPORTS}}) {
88 print DEF "IMPORTS\n";
90 while (($name, $exp)= each %{$data->{IMPORTS}}) {
91 print DEF " $name=$exp\n";
101 if (not $data->{DLBASE}) {
102 ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
103 $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
105 rename "$data->{FILE}.def", "$data->{FILE}_def.old";
107 open(DEF,">$data->{FILE}.def")
108 or croak("Can't create $data->{FILE}.def: $!\n");
109 # put library name in quotes (it could be a keyword, like 'Alias')
110 if ($Config::Config{'cc'} !~ /^gcc/i) {
111 print DEF "LIBRARY \"$data->{DLBASE}\"\n";
112 if ($Config{'ccflags'} !~ /PERL_OBJECT/i) {
113 print DEF "CODE LOADONCALL\n";
114 print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
117 print DEF "EXPORTS\n ";
119 # Export public symbols both with and without underscores to
120 # ensure compatibility between DLLs from different compilers
121 # NOTE: DynaLoader itself only uses the names without underscores,
122 # so this is only to cover the case when the extension DLL may be
123 # linked to directly from C. GSAR 97-07-10
124 if ($Config::Config{'cc'} =~ /^bcc/i) {
125 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
126 push @syms, "_$_", "$_ = _$_";
130 for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
131 push @syms, "$_", "_$_ = $_";
134 print DEF join("\n ",@syms, "\n") if @syms;
135 if (%{$data->{IMPORTS}}) {
136 print DEF "IMPORTS\n";
138 while (($name, $exp)= each %{$data->{IMPORTS}}) {
139 print DEF " $name=$exp\n";
149 require Config; # a reminder for once we do $^O
150 require ExtUtils::XSSymSet;
152 my($isvax) = $Config::Config{'arch'} =~ /VAX/i;
153 my($set) = new ExtUtils::XSSymSet;
156 rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";
158 open(OPT,">$data->{FILE}.opt")
159 or croak("Can't create $data->{FILE}.opt: $!\n");
161 # Options file declaring universal symbols
162 # Used when linking shareable image for dynamic extension,
163 # or when linking PerlShr into which we've added this package
164 # as a static extension
165 # We don't do anything to preserve order, so we won't relax
166 # the GSMATCH criteria for a dynamic extension
168 foreach $sym (@{$data->{FUNCLIST}}) {
169 my $safe = $set->addsym($sym);
170 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
171 else { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; }
173 foreach $sym (@{$data->{DL_VARS}}) {
174 my $safe = $set->addsym($sym);
175 print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
176 if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
177 else { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; }
181 # Options file specifying RTLs to which this extension must be linked.
182 # Eventually, the list of libraries will be supplied by a working
183 # extliblist routine.
184 open OPT,'>rtls.opt';
185 print OPT "PerlShr/Share\n";
186 foreach $rtl (split(/\s+/,$Config::Config{'libs'})) { print OPT "$rtl\n"; }
196 ExtUtils::Mksymlists - write linker options files for dynamic extension
200 use ExtUtils::Mksymlists;
201 Mksymlists({ NAME => $name ,
202 DL_VARS => [ $var1, $var2, $var3 ],
203 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
204 $pkg2 => [ $func3 ] });
208 C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
209 during the creation of shared libraries for dynamic extensions. It is
210 normally called from a MakeMaker-generated Makefile when the extension
211 is built. The linker option file is generated by calling the function
212 C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
213 It takes one argument, a list of key-value pairs, in which the following
220 This gives the name of the extension (I<e.g.> Tk::Canvas) for which
221 the linker option file will be produced.
225 This is identical to the DL_FUNCS attribute available via MakeMaker,
226 from which it is usually taken. Its value is a reference to an
227 associative array, in which each key is the name of a package, and
228 each value is an a reference to an array of function names which
229 should be exported by the extension. For instance, one might say
230 C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
231 Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The
232 function names should be identical to those in the XSUB code;
233 C<Mksymlists> will alter the names written to the linker option
234 file to match the changes made by F<xsubpp>. In addition, if
235 none of the functions in a list begin with the string B<boot_>,
236 C<Mksymlists> will add a bootstrap function for that package,
237 just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is
238 present in the list, it is passed through unchanged.) If
239 DL_FUNCS is not specified, it defaults to the bootstrap
240 function for the extension specified in NAME.
244 This is identical to the DL_VARS attribute available via MakeMaker,
245 and, like DL_FUNCS, it is usually specified via MakeMaker. Its
246 value is a reference to an array of variable names which should
247 be exported by the extension.
251 This key can be used to specify the name of the linker option file
252 (minus the OS-specific extension), if for some reason you do not
253 want to use the default value, which is the last word of the NAME
254 attribute (I<e.g.> for Tk::Canvas, FILE defaults to 'Canvas').
258 This provides an alternate means to specify function names to be
259 exported from the extension. Its value is a reference to an
260 array of function names to be exported by the extension. These
261 names are passed through unaltered to the linker options file.
265 This item specifies the name by which the linker knows the
266 extension, which may be different from the name of the
267 extension itself (for instance, some linkers add an '_' to the
268 name of the extension). If it is not specified, it is derived
269 from the NAME attribute. It is presently used only by OS2.
273 When calling C<Mksymlists>, one should always specify the NAME
274 attribute. In most cases, this is all that's necessary. In
275 the case of unusual extensions, however, the other attributes
276 can be used to provide additional information to the linker.
280 Charles Bailey I<E<lt>bailey@genetics.upenn.eduE<gt>>
284 Last revised 14-Feb-1996, for Perl 5.002.