From f1cab3aed419f78d15acdc831ec7900ddfe6384a Mon Sep 17 00:00:00 2001
From: John Mark Bell <jmb@netsurf-browser.org>
Date: Fri, 5 Sep 2008 11:53:56 +0000
Subject: Dependency tracking

svn path=/trunk/libparserutils/; revision=5257
---
 Makefile              |  2 ++
 Makefile-riscos       |  2 ++
 build/Makefile.common | 45 +++++++++++++++++++++++++++++++++++++++++----
 test/Makefile         | 20 +++++++++++++++++++-
 4 files changed, 64 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 680b2f3..0c02248 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,7 @@ PERL := perl
 PKGCONFIG := pkg-config
 INSTALL := install
 SED := sed
+TOUCH := touch
 LCOV := lcov
 GENHTML := genhtml
 
@@ -33,6 +34,7 @@ MVFLAGS :=
 ECHOFLAGS := 
 MAKEFLAGS :=
 PKGCONFIGFLAGS :=
+TOUCHFLAGS :=
 
 EXEEXT :=
 
diff --git a/Makefile-riscos b/Makefile-riscos
index dff3dd3..12a431b 100644
--- a/Makefile-riscos
+++ b/Makefile-riscos
@@ -16,6 +16,7 @@ PERL := perl
 PKGCONFIG := $(GCCSDK_INSTALL_ENV)/ro-pkg-config
 INSTALL := install
 SED := sed
+TOUCH := touch
 LCOV := echo
 GENHTML := echo
 
@@ -37,6 +38,7 @@ MVFLAGS :=
 ECHOFLAGS := 
 MAKEFLAGS :=
 PKGCONFIGFLAGS :=
+TOUCHFLAGS :=
 
 EXEEXT := ,ff8
 
diff --git a/build/Makefile.common b/build/Makefile.common
index 1817555..d66237e 100644
--- a/build/Makefile.common
+++ b/build/Makefile.common
@@ -46,10 +46,11 @@ OBJECTS := $(subst /,_,$(subst .c,.o,$(SOURCES)))
 
 # Rules
 release: setup $(addprefix $(RELEASEDIR)/,$(OBJECTS))
-	@$(AR) $(ARFLAGS) $(COMPONENT).a $(RELEASEDIR)/*
+	@$(AR) $(ARFLAGS) $(COMPONENT).a $(addprefix $(RELEASEDIR)/,$(OBJECTS))
 
 debug: setup $(addprefix $(DEBUGDIR)/,$(OBJECTS))
-	@$(AR) $(ARFLAGS) $(COMPONENT)-debug.a $(DEBUGDIR)/*
+	@$(AR) $(ARFLAGS) $(COMPONENT)-debug.a \
+			$(addprefix $(DEBUGDIR)/,$(OBJECTS))
 
 test: debug $(TARGET_TESTS)
 
@@ -83,8 +84,8 @@ distclean: clean
 	-@$(RM) $(RMFLAGS) -r $(TOP)/dist
 
 setup:
-	@$(MKDIR) $(MKDIRFLAGS) $(RELEASEDIR)
-	@$(MKDIR) $(MKDIRFLAGS) $(DEBUGDIR)
+	@$(MKDIR) $(MKDIRFLAGS) $(RELEASEDIR)/deps
+	@$(MKDIR) $(MKDIRFLAGS) $(DEBUGDIR)/deps
 	@$(MKDIR) $(MKDIRFLAGS) $(COVERAGEDIR)
 
 export:
@@ -111,6 +112,34 @@ uninstall:
 	@$(RM) $(RMFLAGS) $(PREFIX)/lib/pkgconfig/$(COMPONENT).pc
 	@$(RM) $(RMFLAGS) -r $(PREFIX)/include/parserutils
 
+$(RELEASEDIR)/deps/created:
+	@$(MKDIR) $(MKDIRFLAGS) $(RELEASEDIR)/deps
+	@$(TOUCH) $(TOUCHFLAGS) $(RELEASEDIR)/deps/created
+
+$(DEBUGDIR)/deps/created:
+	@$(MKDIR) $(MKDIRFLAGS) $(DEBUGDIR)/deps
+	@$(TOUCH) $(TOUCHFLAGS) $(DEBUGDIR)/deps/created
+
+DEPFILES :=
+
+define do_dep
+DEPFILES += $(2)
+$$(RELEASEDIR)/deps/$(2): $$(RELEASEDIR)/deps/created $(1)
+	@$$(ECHO) $$(ECHOFLAGS) "DEP $(1)"
+	@$$(RM) $$(RMFLAGS) $$(RELEASEDIR)/deps/$(2)
+	@$$(CC) $$(RELEASECFLAGS) -MM -MT \
+		'$$(RELEASEDIR)/deps/$(2) $$(RELEASEDIR)/$(3)' \
+		-MF $$(RELEASEDIR)/deps/$(2) $(1)
+
+$$(DEBUGDIR)/deps/$(2): $$(DEBUGDIR)/deps/created $(1)
+	@$$(ECHO) $$(ECHOFLAGS) "DEP $(1)"
+	@$$(RM) $$(RMFLAGS) $$(DEBUGDIR)/deps/$(2)
+	@$$(CC) $$(DEBUGCFLAGS) -MM -MT \
+		'$$(DEBUGDIR)/deps/$(2) $$(DEBUGDIR)/$(3)' \
+		-MF $$(DEBUGDIR)/deps/$(2) $(1)
+
+endef
+
 # Finally, build rules for compilation
 define do_compile
 $$(RELEASEDIR)/$(2): $(1)
@@ -123,6 +152,14 @@ $$(DEBUGDIR)/$(2): $(1)
 
 endef
 
+$(eval $(foreach SOURCE,$(filter %.c,$(SOURCES)), \
+	$(call do_dep,$(SOURCE),$(subst /,_,$(SOURCE:.c=.d)),$(subst /,_,$(SOURCE:.c=.o)))))
+
+ifneq ($(findstring clean,$(MAKECMDGOALS)),clean)
+-include $(sort $(addprefix $(RELEASEDIR)/deps/,$(DEPFILES)))
+-include $(sort $(addprefix $(DEBUGDIR)/deps/,$(DEPFILES)))
+endif
+
 $(eval $(foreach SOURCE,$(filter %.c,$(SOURCES)), \
 	$(call do_compile,$(SOURCE),$(subst /,_,$(SOURCE:.c=.o)))))
 
diff --git a/test/Makefile b/test/Makefile
index 73b7659..8d5bc82 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -44,7 +44,8 @@ TESTS_$(d) := $(TESTS_$(d)) regression/cscodec-segv regression/filter-segv \
 ITEMS_CLEAN := $(ITEMS_CLEAN) \
 	$(addprefix $(d), $(addsuffix $(EXEEXT), $(TESTS_$(d)))) \
 	$(addprefix $(d), $(addsuffix .gcda, $(TESTS_$(d)))) \
-	$(addprefix $(d), $(addsuffix .gcno, $(TESTS_$(d))))
+	$(addprefix $(d), $(addsuffix .gcno, $(TESTS_$(d)))) \
+	$(addprefix $(d), $(addsuffix .d, $(TESTS_$(d))))
 ITEMS_DISTCLEAN := $(ITEMS_DISTCLEAN) $(d)log
 
 # Targets for top-level makefile to run
@@ -59,6 +60,16 @@ TARGET_TESTS := $(TARGET_TESTS) test_$(d)
 test_$(d): $(d) $(addprefix $(d), $(TESTS_$(d)))
 	@$(PERL) $(TOP)/$<testrunner.pl $(TOP)/$< $(EXEEXT)
 
+DEP_$(d) :=
+
+define dep_test
+DEP_$(d) += $(2)
+$(2): $(1)
+	@$$(RM) $$(RMFLAGS) $(2)
+	@$$(CC) $$(DEBUGCFLAGS) -MM -MT '$(2) $(3)' -MF $(2) $(1)
+
+endef
+
 # Build rules for each test binary -- they all depend on the debug library
 define compile_test
 $(2): $$(TOP)/$$(COMPONENT)-debug.a $(1)
@@ -69,6 +80,13 @@ $(2): $$(TOP)/$$(COMPONENT)-debug.a $(1)
 
 endef
 
+$(eval $(foreach TEST,$(addprefix $(d), $(TESTS_$(d))), \
+	$(call dep_test,$(addsuffix .c, $(TEST)),$(addsuffix .d, $(TEST)),$(TEST))))
+
+ifneq ($(findstring clean,$(MAKECMDGOALS)),clean)
+-include $(sort $(DEP_$(d)))
+endif
+
 $(eval $(foreach TEST,$(addprefix $(d), $(TESTS_$(d))), \
 	$(call compile_test,$(addsuffix .c, $(TEST)),$(TEST))))
 
-- 
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