-iprefix = $(prefix)
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-ilibdir = $(libdir)
-ilibexecdir = $(libexecdir)
-idatadir = $(datadir)
-idocdir = $(docdir)/libraries/$$pkgid
-ihtmldir = $(htmldir)/libraries/$$pkgid
-html_installed_root = $(ihtmldir)
+iprefix = $(prefix)
+ibindir = $(bindir)
+ilibdir = $(libdir)
+ilibexecdir = $(libexecdir)
+idatadir = $(datadir)
+idocdir = $(docdir)/libraries/$$pkgid
+iinterfacedir = $(htmldir)/libraries/$$pkgid
+ihtmldir = $(htmldir)/libraries/$$pkgid
+html_installed_root = $(htmldir)/libraries