comments updated

[henge/apc.git] / Makefile

diff --git a/Makefile b/Makefile
index 8cefc8e..7b8934d 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,10 @@
 # This makefile builds APC, the Asset Package Compiler for Henge, on the system.
 ################################################################################
 # Driver sources
-DRIVERS ?= apc testapc
+DRIVERS ?= apc testapc testston
+
+# Debug Level
+DEBUG   ?= 1
 
 # Yacc
 YACC   := bison
@@ -16,7 +19,7 @@ YCMD   += $(if $2,&& mv $(notdir $(1:%.y=%.tab.[ch])) $(dir $2))
 
 # Ragel
 RLC     ?= ragel
-RLFALGS ?= -C
+RLFLAGS ?= -C
 RLCMD    = $(strip $(RLC) $(RLFLAGS) $(if $2,-o $2 $(dir $2))$1)
 
 # C
@@ -33,41 +36,53 @@ apc-dLIBS ?=
 LDCMD      = $(strip $(CC) $(LDFLAGS) $(if $2,-o $2) $1) $(LDLIBS) $($1LIBS) 
 
 # APC is built from Ragel, Bison and C source code only.
-ySRC  := $(shell find ./src -type f -name '*.y')
-rlSRC := $(shell find ./src -type f -name '*.rl')
-cSRC  := $(shell find ./src -type f -name '*.c')
+ySRC  := $(shell find src/ -type f -name '*.y')
+rlSRC := $(shell find src/ -type f -name '*.rl')
+cSRC  := $(shell find src/ -type f -name '*.c')
 
 # Generated files from Yacc/Bison and Ragel
 hGEN  := $(ySRC:%.y=%.tab.h)
 cGEN  := $(strip $(ySRC:%.y=%.tab.c) $(rlSRC:%.rl=%.fsm.c))
+.SECONDARY: $(cGEN)
 
 # Determine binary/ir targets (object files and driver binaries)
 cTRG  := $(patsubst %.c,%.o,$(cSRC) $(cGEN))
 ldSRC := $(filter-out $(DRIVERS:%=\%/%.o),$(cTRG))
 cTRG  += $(cTRG:%.o=%-d.o)
 ldTRG := $(DRIVERS:%=%-d) $(DRIVERS)
-ldDEP  = $(filter %/$1.o,$(cTRG)) $(if $(filter %-d,$1),$(ldSRC:%.o=%-d.o),$(ldSRC))
+ldDEP  = $(filter %/$1.o,$(cTRG))
+ldDEP += $(if $(filter testston%,$1),,$(if $(filter %-d,$1),$(ldSRC:%.o=%-d.o),$(ldSRC)))
+
+# Determine if '1' is newer than '2'
+TSTAMP = $(if $(wildcard $1),$(shell stat -c %Y $1),)
+NEWER  = $(eval 4 := $(call TSTAMP,$(dir $2)$1))
+NEWER += $(eval 5 := $(call TSTAMP,$2))
+NEWER += $(if $(filter $5,$(firstword $(sort $4 $5))),$1,$2)
 
 ifeq (,$(filter clean,$(MAKECMDGOALS)))
 # Deps should be generated for each source file, when not cleaning
 cGENDEP = $(if $(wildcard $1),$(subst $(dir $1),,$(filter-out $1 \ %:,$(shell $(CC) -MM -MG $1))),\
 $(info [<$1>: no deps - file not found]))
+# Filter only missing deps
+cMISDEP = $(strip $(foreach dep,$(call cGENDEP,$1),$(if $(wildcard src/$(dep)),,$(dep))))
 # S2S will print the command necessary to create a file when called
-S2S  = $(info $(call $1,$2,$3))
+S2S  = $(if $(filter $2,$(call NEWER,$2,$3)),$(eval 4 := t),$(eval 4 :=))
+S2S += $(if $4,$(info $(call $1,$2,$3)))
 ifeq (,$(filter n,$(MAKEFLAGS)))
 # Unless we're in -n mode, S2S should also invoke the command on the shell
-S2S += $(shell $(call $1,$2,$3))
+S2S += $(if $4,$(shell $(call $1,$2,$3)))
 endif
 endif
 
 # Clean targets
-cleanCMD = $(if $(wildcard $1),rm $(wildcard $1))
+cleanCMD = $(if $(wildcard $1),rm $(wildcard $(sort $1)))
 
 # Rules
 .SECONDEXPANSION:
 $(ldTRG): $$(call ldDEP,$$@) | $(hGEN) ; $(call LDCMD,$^,$@)
-%-d.o: CFLAGS+= -Og -ggdb
-%.o %-d.o: %.c $$(call cGENDEP,$$(dir $$@)%.c) ; $(call CCMD,$<,$@)
+%-d.o: CFLAGS+= -Og -ggdb -DDEBUG=$(DEBUG)
+%.o %-d.o: %.c $$(call cGENDEP,$$(dir $$@)%.c); $(call CCMD,$<,$@)
+%.o %-d.o: %.c; $(error Missing dependencies for $<: $(call cMISDEP, $<))
 %.tab.h: %.tab.c ;
 %.tab.c: %.y $$(call S2S,YCMD,%.y,$$@) ;
 %.fsm.c: %.rl $$(call S2S,RLCMD,%.rl,$$@) ;