From 1ed6fe4326b46d0693bffbea34d6850a046a939c Mon Sep 17 00:00:00 2001
From: Luke Shumaker <lukeshu@sbcglobal.net>
Date: Sun, 28 Dec 2014 18:40:37 -0500
Subject: Make timestamp files for builddeps rules to avoid extra work

---
 Makefile             |  8 +++++-
 buildrom-withgrub.mk |  2 +-
 grub-mkstandalone.mk |  2 +-
 modules.mk           | 78 +++++++++++++++++++++++++++++++++++++++-------------
 4 files changed, 68 insertions(+), 22 deletions(-)

diff --git a/Makefile b/Makefile
index e9501fe..5822815 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ romtypes = txtmode vesafb
 
 i945boards = x60 x60t t60
 
-build: \
+build: PHONY \
     $(foreach board,$(boards),\
               $(foreach keymap,$(keymaps),\
                         $(foreach romtype,$(romtypes),\
@@ -53,3 +53,9 @@ include modules.mk
 include build.mk
 include grub-mkstandalone.mk
 include buildrom-withgrub.mk
+
+
+
+.DELETE_ON_ERROR:
+PHONY:
+.PHONY: PHONY
diff --git a/buildrom-withgrub.mk b/buildrom-withgrub.mk
index 1bfa553..3a054be 100644
--- a/buildrom-withgrub.mk
+++ b/buildrom-withgrub.mk
@@ -3,7 +3,7 @@ resources/libreboot/config/%_vesafb_config: resources/libreboot/config/%_txtmode
 	sed 's/# CONFIG_FRAMEBUFFER_KEEP_VESA_MODE is not set/CONFIG_FRAMEBUFFER_KEEP_VESA_MODE=y/' < $< > $@
 
 define rule_rom_nokeyboard
-tmp/$(board)_nokeyboard_$(romtype).rom: builddeps-coreboot \
+tmp/$(board)_nokeyboard_$(romtype).rom: tmp/builddeps-coreboot.stamp \
     tmp/grub_$(romtype).elf \
     resources/libreboot/config/$(board)_$(romtype)_config
 	rm -f src/coreboot/.config src/coreboot/grub.elf
diff --git a/grub-mkstandalone.mk b/grub-mkstandalone.mk
index 62bd3cb..ef03eb1 100644
--- a/grub-mkstandalone.mk
+++ b/grub-mkstandalone.mk
@@ -9,7 +9,7 @@ grub_vesafb_memdisk_deps   =                 resources/grub/background/backgroun
 # A rule-variable is used here to avoid needing .SECONDEXPANSION
 define rule_grub_elf
 tmp/grub_$(romtype).elf: \
-    builddeps-grub \
+    tmp/builddeps-grub.stamp \
     $(keymapdir)/list.mk resources/utilities/grub-assemble/modules.conf \
     resources/grub/config/grub_memdisk.cfg \
     $(grub_$(romtype)_memdisk_deps) \
diff --git a/modules.mk b/modules.mk
index 00c506e..acc045d 100644
--- a/modules.mk
+++ b/modules.mk
@@ -11,60 +11,100 @@ modules = \
 # powertop only needs to be used when running './powertop.trisquel6'
 all_modules = $(modules) powertop
 
+# Easy names for src/% and tmp/builddeps-%.stamp
+$(addprefix get,$(all_modules)): get%: PHONY src/%
+$(addprefix builddeps-,$(all_modules)): builddeps-%: PHONY tmp/builddeps-%.stamp
+
+# The "all" rules
 getall: $(addprefix src/,$(modules))
 builddeps: $(addprefix builddeps-,$(modules))
 cleandeps: $(addprefix cleandeps-,$(all_modules))
-	rm -rf bin/*
+	rm -rf bin/* tmp/*
 
-# The generic rules
+# If we depend on a file in src/*/*, we should generate it by calling
+# the builddep rule.
+$(foreach module,$(all_modules),$(eval src/$(module)/%: | tmp/builddeps-$(module).stamp; test -e $$@))
 
-$(foreach module,$(all_modules),$(eval src/$(module)/%: builddeps-$(module); test -e $$@))
+
+# The generic rules
 
+# "get" rules
+$(addprefix src/,$(all_modules)): \
 src/%: get source-locations.sh
 	./get $*
-builddeps-%: src/%
+	test -e $@
+	touch $@
+
+# "builddeps" rules
+tmp/builddeps-%.stamp: src/%
 	$(MAKE) -C $<
-cleandeps-%:
+	touch $@
+
+# "cleandeps" rules
+$(addprefix cleandeps-,$(all_modules)): \
+cleandeps-%: PHONY cleandeps-%-custom
+	rm -f tmp/builddeps-%.stamp
+cleandeps-%-custom: PHONY
 	test ! -f src/$*/Makefile || $(MAKE) -C src/$* clean
 
+
 # The overrides
 
-builddeps-coreboot:: src/coreboot
-	$(MAKE) -C $</util/cbfstool
-	$(MAKE) -C $</util/nvramtool
-	$(MAKE) -C $< crossgcc-i386
-cleandeps-coreboot::
+$(addprefix src/coreboot/util/,cbfstool nvramtool crossgcc): \
+src/coreboot/util/%: | src/coreboot
+	test -d $@
+tmp/builddeps-coreboot.stamp:: \
+    tmp/builddeps-coreboot-cbfstool.stamp \
+    tmp/builddeps-coreboot-nvramtool.stamp \
+    tmp/builddeps-coreboot-crossgcc.stamp
+	touch $@
+tmp/builddeps-coreboot-cbfstool.stamp:: src/coreboot/util/cbfstool
+	$(MAKE) -C $<
+	touch $@
+tmp/builddeps-coreboot-nvramtool.stamp:: src/coreboot/util/nvramtool
+	$(MAKE) -C $<
+	touch $@
+tmp/builddeps-coreboot-crossgcc.stamp:: src/coreboot/util/crossgcc
+	$(MAKE) -C src/coreboot crossgcc-i386
+	touch $@
+cleandeps-coreboot-custom:: PHONY
 	test ! -f src/coreboot/Makefile || $(MAKE) -C src/coreboot clean
 	test ! -f src/coreboot/Makefile || $(MAKE) -C src/coreboot/util/cbfstool clean
 	test ! -f src/coreboot/Makefile || $(MAKE) -C src/coreboot/util/nvramtool clean
 	test ! -f src/coreboot/Makefile || $(MAKE) -C src/coreboot crossgcc-clean
+	rm -f tmp/builddeps-coreboot-*.stamp
 
-builddeps-flashrom:: src/flashrom
+tmp/builddeps-flashrom.stamp:: src/flashrom
 	$(MAKE) -C $< patchname=_normal PROGRAM=flashrom
 	$(MAKE) -C $< patchname=_lenovobios_macronix
 	$(MAKE) -C $< patchname=_sst
+	touch $@
 
-builddeps-grub:: src/grub
+tmp/builddeps-grub.stamp:: src/grub
 	cd $< && { test -x ./configure || ./autogen.sh; }
 	cd $< && { test -f ./Makefile || ./configure --with-platform=coreboot; }
 	$(MAKE) -C $<
+	touch $@
 
-builddeps-powertop:: src/powertop
+tmp/builddeps-powertop.stamp:: src/powertop
 	cd $< && { text -x ./configure || ./autogen.sh; }
 	cd $< && { test -f ./Makefile || ./configure; }
 	$(MAKE) -C $<
+	touch $@
 
-builddeps-grubinvaders:: src/grubinvaders
+tmp/builddeps-grubinvaders.stamp:: src/grubinvaders
 	cd $< && ./compile.sh
-cleandeps-grubinvaders::
+	touch $@
+cleandeps-grubinvaders-custom:: PHONY
 	test ! -d src/grubinvaders || { cd src/grubinvaders && ./clean.sh; }
 
-builddeps-seabios:: src/seabios resources/seabios/config/config
+tmp/builddeps-seabios.stamp:: src/seabios resources/seabios/config/config
 	cp resources/seabios/config/config $</.config
 	$(MAKE) -C $<
+	touch $@
 
-builddeps-dejavu:: src/dejavu ;
-cleandeps-dejavu:: ;
+tmp/builddeps-dejavu.stamp:: src/dejavu ; touch $@
+cleandeps-dejavu-custom:: PHONY ;
 
-cleandeps-i945pwm::
+cleandeps-i945pwm-custom:: PHONY
 	rm -f src/i945pwm/i945-pwm
-- 
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