Add EDOC_OPTS variable.

This is useful if edoc can't process the sources without using the
Erlang pre processor, for instance, or to pass other custom options
when building the documentation.

1 files changed, 3 insertions, 1 deletions

diff --git a/erlang.mk b/erlang.mk
index d5fa2aa..9a658bc 100644
--- a/erlang.mk
+++ b/erlang.mk
@@ -189,9 +189,11 @@ clean-deps:
 
 # Documentation.
 
+EDOC_OPTS ?=
+
 docs: clean-docs
 	$(gen_verbose) erl -noshell \
-		-eval 'edoc:application($(PROJECT), ".", []), init:stop().'
+		-eval 'edoc:application($(PROJECT), ".", [$(EDOC_OPTS)]), init:stop().'
 
 clean-docs:
 	$(gen_verbose) rm -f doc/*.css doc/*.html doc/*.png doc/edoc-info