DB_File rescuing (assumes you are installing using carton, under local/)

gistfile1.txt

Installing some database-related modules (such as DBD::Pg) under macos 10.13.x
(High Sierra) will be problematic because Apple is shipping a bad berkeley-db
with this OS.  If you see installation issues mentioning DB_File, you've hit
this problem.

To fix, do these commands in a new shell, in the directory where you are
trying to do the module installation (so as to not pollute your existing
environment):

    sudo port install db48    # you may have this already, e.g. via python27
    eval $(perl -Mlocal::lib='local/lib/perl5')
    cpanm --look DB_File

You're now in another subshell. Edit config.in to add these two lines,
replacing the existing INCLUDE and LIB lines:

   INCLUDE     = /opt/local/include/db48
   LIB = /opt/local/lib/db48

Then execute `perl Makefile.PL && make install` and close this shell.

For background, see: https://rt.cpan.org/Public/Bug/Display.html?id=125238 and https://rt.perl.org/Ticket/Display.html?id=133280