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