package ExtUtils
::Mkbootstrap
;
my($baseext, @bsloadlibs)=@_;
@bsloadlibs = grep($_, @bsloadlibs); # strip empty libs
print STDOUT
" bsloadlibs=@bsloadlibs\n" if $Verbose;
# We need DynaLoader here because we and/or the *_BS file may
# call dl_findfile(). We don't say `use' here because when
# first building perl extensions the DynaLoader will not have
# been built when MakeMaker gets first used.
rename "$baseext.bs", "$baseext.bso"
package DynaLoader
; # execute code as if in DynaLoader
local($osname, $dlsrc) = (); # avoid warnings
($osname, $dlsrc) = @Config::Config
{qw(osname dlsrc)};
if ($Config{'dlsrc'} =~ /^dl_dld/){
push(@dl_resolve_using, dl_findfile
('-lc'));
my(@all) = (@bsloadlibs, @DynaLoader::dl_resolve_using
);
or die "Unable to open $baseext.bs: $!";
print STDOUT
"Writing $baseext.bs\n";
print STDOUT
" 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";
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";
# write extra code if *_BS says so
print BS
$DynaLoader::bscode
if $DynaLoader::bscode
;
ExtUtils::Mkbootstrap - make a bootstrap file for use by DynaLoader
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
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 $BSLOADLIBS, which was computed by
ExtUtils::Liblist::ext(). If this array still is empty, we do nothing,
else we write a .bs file with an C<@DynaLoader::dl_resolve_using>
The C<*_BS> file can put some code into the generated C<*.bs> file by
placing it in C<$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