[p5sagit/p5-mst-13.2.git] / lib / ExtUtils / Mksymlists.pm

package ExtUtils::Mksymlists;

use 5.005_64;
use strict qw[ subs refs ];
# no strict 'vars';  # until filehandles are exempted

use Carp;
use Exporter;
our(@ISA, @EXPORT, $VERSION);
@ISA = 'Exporter';
@EXPORT = '&Mksymlists';
$VERSION = substr q$Revision: 1.17 $, 10;

sub Mksymlists {
    my(%spec) = @_;
    my($osname) = $^O;

    croak("Insufficient information specified to Mksymlists")
        unless ( $spec{NAME} or
                 ($spec{FILE} and ($spec{DL_FUNCS} or $spec{FUNCLIST})) );

    $spec{DL_VARS} = [] unless $spec{DL_VARS};
    ($spec{FILE} = $spec{NAME}) =~ s/.*::// unless $spec{FILE};
    $spec{FUNCLIST} = [] unless $spec{FUNCLIST};
    $spec{DL_FUNCS} = { $spec{NAME} => [] }
        unless ( ($spec{DL_FUNCS} and keys %{$spec{DL_FUNCS}}) or
                 @{$spec{FUNCLIST}});
    if (defined $spec{DL_FUNCS}) {
        my($package);
        foreach $package (keys %{$spec{DL_FUNCS}}) {
            my($packprefix,$sym,$bootseen);
            ($packprefix = $package) =~ s/\W/_/g;
            foreach $sym (@{$spec{DL_FUNCS}->{$package}}) {
                if ($sym =~ /^boot_/) {
                    push(@{$spec{FUNCLIST}},$sym);
                    $bootseen++;
                }
                else { push(@{$spec{FUNCLIST}},"XS_${packprefix}_$sym"); }
            }
            push(@{$spec{FUNCLIST}},"boot_$packprefix") unless $bootseen;
        }
    }

#    We'll need this if we ever add any OS which uses mod2fname
#    not as pseudo-builtin.
#    require DynaLoader;
    if (defined &DynaLoader::mod2fname and not $spec{DLBASE}) {
        $spec{DLBASE} = DynaLoader::mod2fname([ split(/::/,$spec{NAME}) ]);
    }

    if    ($osname eq 'aix') { _write_aix(\%spec); }
    elsif ($osname eq 'MacOS'){ _write_aix(\%spec) }
    elsif ($osname eq 'VMS') { _write_vms(\%spec) }
    elsif ($osname eq 'os2') { _write_os2(\%spec) }
    elsif ($osname eq 'MSWin32') { _write_win32(\%spec) }
    else { croak("Don't know how to create linker option file for $osname\n"); }
}


sub _write_aix {
    my($data) = @_;

    rename "$data->{FILE}.exp", "$data->{FILE}.exp_old";

    open(EXP,">$data->{FILE}.exp")
        or croak("Can't create $data->{FILE}.exp: $!\n");
    print EXP join("\n",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
    print EXP join("\n",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
    close EXP;
}


sub _write_os2 {
    my($data) = @_;
    require Config;
    my $threaded = ($Config::Config{archname} =~ /-thread/ ? " threaded" : "");

    if (not $data->{DLBASE}) {
        ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
        $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
    }
    my $distname = $data->{DISTNAME} || $data->{NAME};
    $distname = "Distribution $distname";
    my $comment = "Perl (v$Config::Config{version}$threaded) module $data->{NAME}";
    if ($data->{INSTALLDIRS} and $data->{INSTALLDIRS} eq 'perl') {
	$distname = 'perl5-porters@perl.org';
	$comment = "Core $comment";
    }
    rename "$data->{FILE}.def", "$data->{FILE}_def.old";

    open(DEF,">$data->{FILE}.def")
        or croak("Can't create $data->{FILE}.def: $!\n");
    print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n";
    print DEF "DESCRIPTION '\@#$distname:$data->{VERSION}#\@ $comment'\n";
    print DEF "CODE LOADONCALL\n";
    print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
    print DEF "EXPORTS\n  ";
    print DEF join("\n  ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
    print DEF join("\n  ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
    if (%{$data->{IMPORTS}}) {
        print DEF "IMPORTS\n";
	my ($name, $exp);
	while (($name, $exp)= each %{$data->{IMPORTS}}) {
	    print DEF "  $name=$exp\n";
	}
    }
    close DEF;
}

sub _write_win32 {
    my($data) = @_;

    require Config;
    if (not $data->{DLBASE}) {
        ($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
        $data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
    }
    rename "$data->{FILE}.def", "$data->{FILE}_def.old";

    open(DEF,">$data->{FILE}.def")
        or croak("Can't create $data->{FILE}.def: $!\n");
    # put library name in quotes (it could be a keyword, like 'Alias')
    if ($Config::Config{'cc'} !~ /^gcc/i) {
      print DEF "LIBRARY \"$data->{DLBASE}\"\n";
    }
    print DEF "EXPORTS\n  ";
    my @syms;
    # Export public symbols both with and without underscores to
    # ensure compatibility between DLLs from different compilers
    # NOTE: DynaLoader itself only uses the names without underscores,
    # so this is only to cover the case when the extension DLL may be
    # linked to directly from C. GSAR 97-07-10
    if ($Config::Config{'cc'} =~ /^bcc/i) {
	for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
	    push @syms, "_$_", "$_ = _$_";
	}
    }
    else {
	for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
	    push @syms, "$_", "_$_ = $_";
	}
    }
    print DEF join("\n  ",@syms, "\n") if @syms;
    if (%{$data->{IMPORTS}}) {
        print DEF "IMPORTS\n";
        my ($name, $exp);
        while (($name, $exp)= each %{$data->{IMPORTS}}) {
            print DEF "  $name=$exp\n";
        }
    }
    close DEF;
}


sub _write_vms {
    my($data) = @_;

    require Config; # a reminder for once we do $^O
    require ExtUtils::XSSymSet;

    my($isvax) = $Config::Config{'archname'} =~ /VAX/i;
    my($set) = new ExtUtils::XSSymSet;
    my($sym);

    rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";

    open(OPT,">$data->{FILE}.opt")
        or croak("Can't create $data->{FILE}.opt: $!\n");

    # Options file declaring universal symbols
    # Used when linking shareable image for dynamic extension,
    # or when linking PerlShr into which we've added this package
    # as a static extension
    # We don't do anything to preserve order, so we won't relax
    # the GSMATCH criteria for a dynamic extension

    print OPT "case_sensitive=yes\n"
        if $Config::Config{d_vms_case_sensitive_symbols};
    foreach $sym (@{$data->{FUNCLIST}}) {
        my $safe = $set->addsym($sym);
        if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
        else        { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; }
    }
    foreach $sym (@{$data->{DL_VARS}}) {
        my $safe = $set->addsym($sym);
        print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
        if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
        else        { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; }
    }
    close OPT;

}

1;

__END__

=head1 NAME

ExtUtils::Mksymlists - write linker options files for dynamic extension

=head1 SYNOPSIS

    use ExtUtils::Mksymlists;
    Mksymlists({ NAME     => $name ,
                 DL_VARS  => [ $var1, $var2, $var3 ],
                 DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
                               $pkg2 => [ $func3 ] });

=head1 DESCRIPTION

C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
during the creation of shared libraries for dynamic extensions.  It is
normally called from a MakeMaker-generated Makefile when the extension
is built.  The linker option file is generated by calling the function
C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
It takes one argument, a list of key-value pairs, in which the following
keys are recognized:

=over

=item DLBASE

This item specifies the name by which the linker knows the
extension, which may be different from the name of the
extension itself (for instance, some linkers add an '_' to the
name of the extension).  If it is not specified, it is derived
from the NAME attribute.  It is presently used only by OS2 and Win32.

=item DL_FUNCS

This is identical to the DL_FUNCS attribute available via MakeMaker,
from which it is usually taken.  Its value is a reference to an
associative array, in which each key is the name of a package, and
each value is an a reference to an array of function names which
should be exported by the extension.  For instance, one might say
C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>.  The
function names should be identical to those in the XSUB code;
C<Mksymlists> will alter the names written to the linker option
file to match the changes made by F<xsubpp>.  In addition, if
none of the functions in a list begin with the string B<boot_>,
C<Mksymlists> will add a bootstrap function for that package,
just as xsubpp does.  (If a B<boot_E<lt>pkgE<gt>> function is
present in the list, it is passed through unchanged.)  If
DL_FUNCS is not specified, it defaults to the bootstrap
function for the extension specified in NAME.

=item DL_VARS

This is identical to the DL_VARS attribute available via MakeMaker,
and, like DL_FUNCS, it is usually specified via MakeMaker.  Its
value is a reference to an array of variable names which should
be exported by the extension.

=item FILE

This key can be used to specify the name of the linker option file
(minus the OS-specific extension), if for some reason you do not
want to use the default value, which is the last word of the NAME
attribute (I<e.g.> for C<Tk::Canvas>, FILE defaults to C<Canvas>).

=item FUNCLIST

This provides an alternate means to specify function names to be
exported from the extension.  Its value is a reference to an
array of function names to be exported by the extension.  These
names are passed through unaltered to the linker options file.
Specifying a value for the FUNCLIST attribute suppresses automatic
generation of the bootstrap function for the package. To still create
the bootstrap name you have to specify the package name in the
DL_FUNCS hash:

    Mksymlists({ NAME     => $name ,
		 FUNCLIST => [ $func1, $func2 ],
                 DL_FUNCS => { $pkg => [] } });


=item IMPORTS

This attribute is used to specify names to be imported into the
extension. It is currently only used by OS/2 and Win32.

=item NAME

This gives the name of the extension (I<e.g.> C<Tk::Canvas>) for which
the linker option file will be produced.

=back

When calling C<Mksymlists>, one should always specify the NAME
attribute.  In most cases, this is all that's necessary.  In
the case of unusual extensions, however, the other attributes
can be used to provide additional information to the linker.

=head1 AUTHOR

Charles Bailey I<E<lt>bailey@newman.upenn.eduE<gt>>

=head1 REVISION

Last revised 14-Feb-1996, for Perl 5.002.
Commit	Line	Data
c07a80fd	1	package ExtUtils::Mksymlists;
cb50131a	2
cb50131a	3	use 5.005_64;
c07a80fd	4	use strict qw[ subs refs ];
	5	# no strict 'vars'; # until filehandles are exempted
	6
	7	use Carp;
c07a80fd	8	use Exporter;
cb50131a	9	our(@ISA, @EXPORT, $VERSION);
f1387719	10	@ISA = 'Exporter';
f1387719	11	@EXPORT = '&Mksymlists';
6ee623d5	12	$VERSION = substr q$Revision: 1.17 $, 10;
c07a80fd	13
	14	sub Mksymlists {
	15	my(%spec) = @_;
f1387719	16	my($osname) = $^O;
c07a80fd	17
	18	croak("Insufficient information specified to Mksymlists")
	19	unless ( $spec{NAME} or
	20	($spec{FILE} and ($spec{DL_FUNCS} or $spec{FUNCLIST})) );
	21
	22	$spec{DL_VARS} = [] unless $spec{DL_VARS};
	23	($spec{FILE} = $spec{NAME}) =~ s/.*::// unless $spec{FILE};
348844dc	24	$spec{FUNCLIST} = [] unless $spec{FUNCLIST};
c07a80fd	25	$spec{DL_FUNCS} = { $spec{NAME} => [] }
c07a80fd	26	unless ( ($spec{DL_FUNCS} and keys %{$spec{DL_FUNCS}}) or
348844dc	27	@{$spec{FUNCLIST}});
c07a80fd	28	if (defined $spec{DL_FUNCS}) {
	29	my($package);
	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);
	36	$bootseen++;
	37	}
	38	else { push(@{$spec{FUNCLIST}},"XS_${packprefix}_$sym"); }
	39	}
	40	push(@{$spec{FUNCLIST}},"boot_$packprefix") unless $bootseen;
	41	}
	42	}
	43
	44	# We'll need this if we ever add any OS which uses mod2fname
760ac839	45	# not as pseudo-builtin.
c07a80fd	46	# require DynaLoader;
c2e89b3d	47	if (defined &DynaLoader::mod2fname and not $spec{DLBASE}) {
	48	$spec{DLBASE} = DynaLoader::mod2fname([ split(/::/,$spec{NAME}) ]);
	49	}
c07a80fd	50
f1387719	51	if ($osname eq 'aix') { _write_aix(\%spec); }
6d697788	52	elsif ($osname eq 'MacOS'){ _write_aix(\%spec) }
f1387719	53	elsif ($osname eq 'VMS') { _write_vms(\%spec) }
bab2b58e	54	elsif ($osname eq 'os2') { _write_os2(\%spec) }
68dc0745	55	elsif ($osname eq 'MSWin32') { _write_win32(\%spec) }
f1387719	56	else { croak("Don't know how to create linker option file for $osname\n"); }
c07a80fd	57	}
	58
	59
	60	sub _write_aix {
	61	my($data) = @_;
	62
	63	rename "$data->{FILE}.exp", "$data->{FILE}.exp_old";
	64
	65	open(EXP,">$data->{FILE}.exp")
	66	or croak("Can't create $data->{FILE}.exp: $!\n");
	67	print EXP join("\n",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
	68	print EXP join("\n",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
	69	close EXP;
	70	}
	71
	72
	73	sub _write_os2 {
	74	my($data) = @_;
6ee623d5	75	require Config;
6ee623d5	76	my $threaded = ($Config::Config{archname} =~ /-thread/ ? " threaded" : "");
c07a80fd	77
	78	if (not $data->{DLBASE}) {
	79	($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
	80	$data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
	81	}
3cfae81b	82	my $distname = $data->{DISTNAME} \|\| $data->{NAME};
3cfae81b	83	$distname = "Distribution $distname";
146174a9	84	my $comment = "Perl (v$Config::Config{version}$threaded) module $data->{NAME}";
3cfae81b	85	if ($data->{INSTALLDIRS} and $data->{INSTALLDIRS} eq 'perl') {
	86	$distname = 'perl5-porters@perl.org';
	87	$comment = "Core $comment";
	88	}
c07a80fd	89	rename "$data->{FILE}.def", "$data->{FILE}_def.old";
	90
	91	open(DEF,">$data->{FILE}.def")
	92	or croak("Can't create $data->{FILE}.def: $!\n");
	93	print DEF "LIBRARY '$data->{DLBASE}' INITINSTANCE TERMINSTANCE\n";
3cfae81b	94	print DEF "DESCRIPTION '\@#$distname:$data->{VERSION}#\@ $comment'\n";
c07a80fd	95	print DEF "CODE LOADONCALL\n";
c07a80fd	96	print DEF "DATA LOADONCALL NONSHARED MULTIPLE\n";
c2e89b3d	97	print DEF "EXPORTS\n ";
	98	print DEF join("\n ",@{$data->{DL_VARS}}, "\n") if @{$data->{DL_VARS}};
	99	print DEF join("\n ",@{$data->{FUNCLIST}}, "\n") if @{$data->{FUNCLIST}};
	100	if (%{$data->{IMPORTS}}) {
	101	print DEF "IMPORTS\n";
875fa795	102	my ($name, $exp);
	103	while (($name, $exp)= each %{$data->{IMPORTS}}) {
	104	print DEF " $name=$exp\n";
	105	}
c2e89b3d	106	}
c07a80fd	107	close DEF;
	108	}
	109
68dc0745	110	sub _write_win32 {
	111	my($data) = @_;
	112
3e3baf6d	113	require Config;
68dc0745	114	if (not $data->{DLBASE}) {
	115	($data->{DLBASE} = $data->{NAME}) =~ s/.*:://;
	116	$data->{DLBASE} = substr($data->{DLBASE},0,7) . '_';
	117	}
	118	rename "$data->{FILE}.def", "$data->{FILE}_def.old";
	119
	120	open(DEF,">$data->{FILE}.def")
	121	or croak("Can't create $data->{FILE}.def: $!\n");
84902520	122	# put library name in quotes (it could be a keyword, like 'Alias')
5b0d9cbe	123	if ($Config::Config{'cc'} !~ /^gcc/i) {
5b0d9cbe	124	print DEF "LIBRARY \"$data->{DLBASE}\"\n";
5b0d9cbe	125	}
68dc0745	126	print DEF "EXPORTS\n ";
84902520	127	my @syms;
	128	# Export public symbols both with and without underscores to
	129	# ensure compatibility between DLLs from different compilers
	130	# NOTE: DynaLoader itself only uses the names without underscores,
	131	# so this is only to cover the case when the extension DLL may be
	132	# linked to directly from C. GSAR 97-07-10
3e3baf6d	133	if ($Config::Config{'cc'} =~ /^bcc/i) {
84902520	134	for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
	135	push @syms, "_$_", "$_ = _$_";
	136	}
3e3baf6d	137	}
84902520	138	else {
	139	for (@{$data->{DL_VARS}}, @{$data->{FUNCLIST}}) {
	140	push @syms, "$_", "_$_ = $_";
	141	}
	142	}
	143	print DEF join("\n ",@syms, "\n") if @syms;
68dc0745	144	if (%{$data->{IMPORTS}}) {
	145	print DEF "IMPORTS\n";
	146	my ($name, $exp);
	147	while (($name, $exp)= each %{$data->{IMPORTS}}) {
	148	print DEF " $name=$exp\n";
	149	}
	150	}
	151	close DEF;
	152	}
	153
c07a80fd	154
	155	sub _write_vms {
	156	my($data) = @_;
a6e61155	157
f1387719	158	require Config; # a reminder for once we do $^O
ff0cee69	159	require ExtUtils::XSSymSet;
a6e61155	160
8c99d73e	161	my($isvax) = $Config::Config{'archname'} =~ /VAX/i;
ff0cee69	162	my($set) = new ExtUtils::XSSymSet;
c07a80fd	163	my($sym);
	164
	165	rename "$data->{FILE}.opt", "$data->{FILE}.opt_old";
	166
	167	open(OPT,">$data->{FILE}.opt")
	168	or croak("Can't create $data->{FILE}.opt: $!\n");
	169
	170	# Options file declaring universal symbols
	171	# Used when linking shareable image for dynamic extension,
	172	# or when linking PerlShr into which we've added this package
	173	# as a static extension
	174	# We don't do anything to preserve order, so we won't relax
	175	# the GSMATCH criteria for a dynamic extension
	176
80601f72	177	print OPT "case_sensitive=yes\n"
80601f72	178	if $Config::Config{d_vms_case_sensitive_symbols};
c07a80fd	179	foreach $sym (@{$data->{FUNCLIST}}) {
ff0cee69	180	my $safe = $set->addsym($sym);
	181	if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
	182	else { print OPT "SYMBOL_VECTOR=($safe=PROCEDURE)\n"; }
c07a80fd	183	}
c07a80fd	184	foreach $sym (@{$data->{DL_VARS}}) {
ff0cee69	185	my $safe = $set->addsym($sym);
c07a80fd	186	print OPT "PSECT_ATTR=${sym},PIC,OVR,RD,NOEXE,WRT,NOSHR\n";
ff0cee69	187	if ($isvax) { print OPT "UNIVERSAL=$safe\n" }
ff0cee69	188	else { print OPT "SYMBOL_VECTOR=($safe=DATA)\n"; }
c07a80fd	189	}
	190	close OPT;
	191
c07a80fd	192	}
	193
	194	1;
	195
	196	__END__
	197
	198	=head1 NAME
	199
	200	ExtUtils::Mksymlists - write linker options files for dynamic extension
	201
	202	=head1 SYNOPSIS
	203
	204	use ExtUtils::Mksymlists;
	205	Mksymlists({ NAME => $name ,
	206	DL_VARS => [ $var1, $var2, $var3 ],
	207	DL_FUNCS => { $pkg1 => [ $func1, $func2 ],
	208	$pkg2 => [ $func3 ] });
	209
	210	=head1 DESCRIPTION
	211
	212	C<ExtUtils::Mksymlists> produces files used by the linker under some OSs
1fef88e7	213	during the creation of shared libraries for dynamic extensions. It is
c07a80fd	214	normally called from a MakeMaker-generated Makefile when the extension
	215	is built. The linker option file is generated by calling the function
	216	C<Mksymlists>, which is exported by default from C<ExtUtils::Mksymlists>.
	217	It takes one argument, a list of key-value pairs, in which the following
	218	keys are recognized:
	219
2ae324a7	220	=over
2ae324a7	221
875fa795	222	=item DLBASE
c07a80fd	223
875fa795	224	This item specifies the name by which the linker knows the
	225	extension, which may be different from the name of the
	226	extension itself (for instance, some linkers add an '_' to the
	227	name of the extension). If it is not specified, it is derived
	228	from the NAME attribute. It is presently used only by OS2 and Win32.
c07a80fd	229
	230	=item DL_FUNCS
	231
	232	This is identical to the DL_FUNCS attribute available via MakeMaker,
	233	from which it is usually taken. Its value is a reference to an
	234	associative array, in which each key is the name of a package, and
	235	each value is an a reference to an array of function names which
	236	should be exported by the extension. For instance, one might say
875fa795	237	C<DL_FUNCS =E<gt> { Homer::Iliad =E<gt> [ qw(trojans greeks) ],
a5f75d66	238	Homer::Odyssey =E<gt> [ qw(travellers family suitors) ] }>. The
c07a80fd	239	function names should be identical to those in the XSUB code;
	240	C<Mksymlists> will alter the names written to the linker option
	241	file to match the changes made by F<xsubpp>. In addition, if
	242	none of the functions in a list begin with the string B<boot_>,
	243	C<Mksymlists> will add a bootstrap function for that package,
	244	just as xsubpp does. (If a B<boot_E<lt>pkgE<gt>> function is
	245	present in the list, it is passed through unchanged.) If
	246	DL_FUNCS is not specified, it defaults to the bootstrap
	247	function for the extension specified in NAME.
	248
	249	=item DL_VARS
	250
	251	This is identical to the DL_VARS attribute available via MakeMaker,
	252	and, like DL_FUNCS, it is usually specified via MakeMaker. Its
	253	value is a reference to an array of variable names which should
	254	be exported by the extension.
	255
	256	=item FILE
	257
	258	This key can be used to specify the name of the linker option file
	259	(minus the OS-specific extension), if for some reason you do not
	260	want to use the default value, which is the last word of the NAME
875fa795	261	attribute (I<e.g.> for C<Tk::Canvas>, FILE defaults to C<Canvas>).
c07a80fd	262
	263	=item FUNCLIST
	264
	265	This provides an alternate means to specify function names to be
	266	exported from the extension. Its value is a reference to an
	267	array of function names to be exported by the extension. These
	268	names are passed through unaltered to the linker options file.
de592821	269	Specifying a value for the FUNCLIST attribute suppresses automatic
875fa795	270	generation of the bootstrap function for the package. To still create
	271	the bootstrap name you have to specify the package name in the
	272	DL_FUNCS hash:
c07a80fd	273
875fa795	274	Mksymlists({ NAME => $name ,
	275	FUNCLIST => [ $func1, $func2 ],
	276	DL_FUNCS => { $pkg => [] } });
c07a80fd	277
875fa795	278
	279	=item IMPORTS
	280
	281	This attribute is used to specify names to be imported into the
	282	extension. It is currently only used by OS/2 and Win32.
	283
	284	=item NAME
	285
	286	This gives the name of the extension (I<e.g.> C<Tk::Canvas>) for which
	287	the linker option file will be produced.
c07a80fd	288
2ae324a7	289	=back
2ae324a7	290
c07a80fd	291	When calling C<Mksymlists>, one should always specify the NAME
	292	attribute. In most cases, this is all that's necessary. In
	293	the case of unusual extensions, however, the other attributes
	294	can be used to provide additional information to the linker.
	295
	296	=head1 AUTHOR
	297
bd3fa61c	298	Charles Bailey I<E<lt>bailey@newman.upenn.eduE<gt>>
c07a80fd	299
	300	=head1 REVISION
	301
a5f75d66	302	Last revised 14-Feb-1996, for Perl 5.002.