From c63970927d153b59c576e6319ed406412d64cc02 Mon Sep 17 00:00:00 2001
From: Matthew Sackman <matthew@rabbitmq.com>
Date: Thu, 23 Sep 2010 11:43:29 +0100
Subject: By using an order only depend, we ensure that the deps file must
 exist, but it being newer than the beams will not cause beams to be rebuilt.
 We also ensure that if the deps is being rebuilt, we delete the old one first
 so that if deps generation fails, the order-only depends cannot be satisfied.

---
 Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 38ec8196..7c18cc7f 100644
--- a/Makefile
+++ b/Makefile
@@ -92,12 +92,13 @@ endif
 all: $(TARGETS)
 
 $(DEPS_FILE): $(SOURCES) $(INCLUDES)
+	rm -f $@
 	escript generate_deps $(INCLUDE_DIR) $(SOURCE_DIR) \$$\(EBIN_DIR\) $@
 
 $(EBIN_DIR)/rabbit.app: $(EBIN_DIR)/rabbit_app.in $(BEAM_TARGETS) generate_app
 	escript generate_app $(EBIN_DIR) $@ < $<
 
-$(EBIN_DIR)/%.beam: $(SOURCE_DIR)/%.erl $(DEPS_FILE)
+$(EBIN_DIR)/%.beam: $(SOURCE_DIR)/%.erl | $(DEPS_FILE)
 	erlc $(ERLC_OPTS) -pa $(EBIN_DIR) $<
 
 $(INCLUDE_DIR)/rabbit_framing.hrl: codegen.py $(AMQP_CODEGEN_DIR)/amqp_codegen.py $(AMQP_SPEC_JSON_FILES_0_9_1) $(AMQP_SPEC_JSON_FILES_0_8)
-- 
cgit v1.2.1