Apache::AuthDBI change for mp2 only

[Kevin A. McGrail]

Now that I am using a server without mp1, I noticed that I cannot perl -c my
startup.pl because it uses AuthDBI and AuthDBI looks for MP1 files if I'm
not running under MP2.

Since I'm not running under MP2 for the perl -c check, I commented the if
block to just load Apache2:Const.


use constant MP2 => $ENV{MOD_PERL_API_VERSION} == 2 ? 1 : 0;

BEGIN {
  my @constants = qw( OK AUTH_REQUIRED FORBIDDEN DECLINED SERVER_ERROR );
  #if (MP2) {
    require Apache2::Const;
    import Apache2::Const @constants;
  #}
  #else {
  #  require Apache::Constants;
  #  import Apache::Constants @constants;
  #}
}



I'm thinking something better would be:

if (MP2 or ($ENV{'GATEWAY_INTERFACE'} eq '' && -f
/usr/local/lib/perl5/site_perl/5.8.6/i686-linux/Apache2/Const.pm)

However, my question is what's the best way to check for the existance of
Const.pm?  Sort of like an PREREQ_PM 'Apache2::Const' => 1 test?

Regards,
KAM