freebsd-dev/gnu/usr.bin/perl/BSDPAN/README

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$FreeBSD$
For importers of the future Perl versions. BSDPAN operation depends on
the fact it is loaded before system Perl modules. To achieve this, the
semi-documented (it is described as undocumented in Perl documentation)
define APPLLIB_EXP is used. Run Perl configure as follows (with other
relevant arguments of course):
sh Configure -Dccflags='-DAPPLLIB_EXP="/usr/libdata/perl/BSDPAN"'
Since FreeBSD uses its own Makefile to build Perl, it is necessary to
duplicate this as an extra CFLAG. This resides currently in
gnu/usr.bin/perl/Makefile.inc:
CFLAGS+= '-DAPPLLIB_EXP="/usr/libdata/perl/BSDPAN"'
If APPLLIB_EXP ever gets removed from Perl, some other way of putting
/usr/libdata/perl/BSDPAN in the start of @INC must be devised.
-Anton <tobez@tobez.org>