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# Map object file names on non-Unix platforms
$objects =~ s/\.o\w/$objext/g if ($objext ne ".o");

# Need to pick up the DBI headers.  The DBI headers might be in
# $INSTALLARCHLIB rather than $INSTALLSITEARCH.  This is the case under
# Debian, according to Roderick Schertler <roderick@argon.org>, 1999-09.
# May also, or instead, need -I\$(SITEARCHEXP)/auto/DBI; this was
# reported by Joachim Schrod <jschrod@acm.org> in January 1998 on AIX.
# And on 2002-07-03, Roderick Schertler also reported that we may need
# INSTALLVENDORARCH sometimes (Debian again), and gave the join/map
# formulation without listing SITEARCHEXP.  On my Solaris 7 box with my
# build of Perl 5.8.0, INSTALLVENDORARCH is empty, and SITEARCHEXP is
# the same as INSTALLSITEARCH, but that doesn't do any harm.
#
# ??Should we use $Config{installarchlib} etc, and check for what exists?
# ??Can we sensibly check for uniqueness of directory names?
my $INC2 = join ' ', map { "-I\$($_)/auto/DBI" }
            qw (INSTALLARCHLIB INSTALLSITEARCH INSTALLVENDORARCH SITEARCHEXP);

# Can we find the auto/DBI directory anywhere in @INC?
my $INC3 = join ' ', map { -d "$_/auto/DBI" && "-I$_/auto/DBI" || "" } @INC;