From 5558eb0633a48325970baa647b9e8f4ac9eb4520 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sun, 10 Jun 2018 20:33:12 +0100
Subject: [PATCH 3/4] docs: Suggest using PKG_CHECK_VAR to substitute plugindir
 and filterdir.

(cherry picked from commit fcd05424c819e433543030373a7f4136b511ddc6)
---
 docs/nbdkit-filter.pod | 6 ++++++
 docs/nbdkit-plugin.pod | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/docs/nbdkit-filter.pod b/docs/nbdkit-filter.pod
index 7105a1d..2e23a8e 100644
--- a/docs/nbdkit-filter.pod
+++ b/docs/nbdkit-filter.pod
@@ -463,6 +463,12 @@ You can also run pkg-config/pkgconf directly, for example:
    exit 1
  fi
 
+You can also substitute the filterdir variable by doing:
+
+ PKG_CHECK_VAR([NBDKIT_FILTERDIR], [nbdkit], [filterdir])
+
+which defines C<$(NBDKIT_FILTERDIR)> in automake-generated Makefiles.
+
 =head1 SEE ALSO
 
 L<nbdkit(1)>,
diff --git a/docs/nbdkit-plugin.pod b/docs/nbdkit-plugin.pod
index 695e588..a393be9 100644
--- a/docs/nbdkit-plugin.pod
+++ b/docs/nbdkit-plugin.pod
@@ -668,6 +668,12 @@ You can also run pkg-config/pkgconf directly, for example:
    exit 1
  fi
 
+You can also substitute the plugindir variable by doing:
+
+ PKG_CHECK_VAR([NBDKIT_PLUGINDIR], [nbdkit], [plugindir])
+
+which defines C<$(NBDKIT_PLUGINDIR)> in automake-generated Makefiles.
+
 =head1 WRITING PLUGINS IN OTHER PROGRAMMING LANGUAGES
 
 You can also write nbdkit plugins in OCaml, Perl, Python or Ruby.
-- 
2.16.2