# ExtUtils::Mkbootstrap - phpMan

## NAME
    [ExtUtils::Mkbootstrap] - make a bootstrap file for use by DynaLoader

## SYNOPSIS
      Mkbootstrap

## DESCRIPTION
    Mkbootstrap typically gets called from an extension Makefile.

    There is no "*.bs" file supplied with the extension. Instead, there may
    be a *_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
    @[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 @[DynaLoader::dl_resolve_using] array.

    The *_BS file can put some code into the generated "*.bs" file by
    placing it in $bscode. This is a handy 'escape' mechanism that may prove
    useful in complex situations.

    If @[DynaLoader::dl_resolve_using] contains "-L*" or "-l*" entries then
    Mkbootstrap will automatically add a dl_findfile() call to the generated
    "*.bs" file.