Initial Commit

database/perl/lib/ExtUtils/Mkbootstrap.pm

@@ -0,0 +1,114 @@
+package ExtUtils::Mkbootstrap;
+
+use strict;
+use warnings;
+
+our $VERSION = '7.58';
+$VERSION =~ tr/_//d;
+
+require Exporter;
+our @ISA = ('Exporter');
+our @EXPORT = ('&Mkbootstrap');
+
+use Config;
+
+our $Verbose = 0;
+
+
+sub Mkbootstrap {
+    my($baseext, @bsloadlibs)=@_;
+    @bsloadlibs = grep($_, @bsloadlibs); # strip empty libs
+
+    print "	bsloadlibs=@bsloadlibs\n" if $Verbose;
+
+    # We need DynaLoader here because we and/or the *_BS file may
+    # call dl_findfile(). We don't say `use' here because when
+    # first building perl extensions the DynaLoader will not have
+    # been built when MakeMaker gets first used.
+    require DynaLoader;
+
+    rename "$baseext.bs", "$baseext.bso"
+      if -s "$baseext.bs";
+
+    if (-f "${baseext}_BS"){
+	$_ = "${baseext}_BS";
+	package DynaLoader; # execute code as if in DynaLoader
+	no strict 'vars';
+	local($osname, $dlsrc) = (); # avoid warnings
+	($osname, $dlsrc) = @Config::Config{qw(osname dlsrc)};
+	$bscode = "";
+	unshift @INC, ".";
+	require $_;
+	shift @INC;
+    }
+
+    if ($Config{'dlsrc'} =~ /^dl_dld/){
+	package DynaLoader;
+	no strict 'vars';
+	push(@dl_resolve_using, dl_findfile('-lc'));
+    }
+
+    my(@all) = (@bsloadlibs, @DynaLoader::dl_resolve_using);
+    my($method) = '';
+    if (@all || (defined $DynaLoader::bscode && length $DynaLoader::bscode)){
+	open my $bs, ">", "$baseext.bs"
+		or die "Unable to open $baseext.bs: $!";
+	print "Writing $baseext.bs\n";
+	print "	containing: @all" if $Verbose;
+	print $bs "# $baseext DynaLoader bootstrap file for $^O architecture.\n";
+	print $bs "# Do not edit this file, changes will be lost.\n";
+	print $bs "# This file was automatically generated by the\n";
+	print $bs "# Mkbootstrap routine in ExtUtils::Mkbootstrap (v$VERSION).\n";
+	if (@all) {
+	    print $bs "\@DynaLoader::dl_resolve_using = ";
+	    # If @all contains names in the form -lxxx or -Lxxx then it's asking for
+	    # runtime library location so we automatically add a call to dl_findfile()
+	    if (" @all" =~ m/ -[lLR]/){
+		print $bs "  dl_findfile(qw(\n  @all\n  ));\n";
+	    } else {
+		print $bs "  qw(@all);\n";
+	    }
+	}
+	# write extra code if *_BS says so
+	print $bs $DynaLoader::bscode if $DynaLoader::bscode;
+	print $bs "\n1;\n";
+	close $bs;
+    }
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+ExtUtils::Mkbootstrap - make a bootstrap file for use by DynaLoader
+
+=head1 SYNOPSIS
+
+  Mkbootstrap
+
+=head1 DESCRIPTION
+
+Mkbootstrap typically gets called from an extension Makefile.
+
+There is no C<*.bs> file supplied with the extension. Instead, there may
+be a C<*_BS> file which has code for the special cases, like posix for
+berkeley db on the NeXT.
+
+This file will get parsed, and produce a maybe empty
+C<@DynaLoader::dl_resolve_using> array for the current architecture.
+That will be extended by $BSLOADLIBS, which was computed by
+ExtUtils::Liblist::ext(). If this array still is empty, we do nothing,
+else we write a .bs file with an C<@DynaLoader::dl_resolve_using>
+array.
+
+The C<*_BS> file can put some code into the generated C<*.bs> file by
+placing it in C<$bscode>. This is a handy 'escape' mechanism that may
+prove useful in complex situations.
+
+If @DynaLoader::dl_resolve_using contains C<-L*> or C<-l*> entries then
+Mkbootstrap will automatically add a dl_findfile() call to the
+generated C<*.bs> file.
+
+=cut