# Driver sources
DRIVERS ?= apc testapc
+# Debug Level
+DEBUG ?= 1
+
# Yacc
YACC := bison
YFLAGS ?= -v -d -Wall
# Ragel
RLC ?= ragel
-RLFALGS ?= -C
+RLFLAGS ?= -C
RLCMD = $(strip $(RLC) $(RLFLAGS) $(if $2,-o $2 $(dir $2))$1)
# C
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))
ldTRG := $(DRIVERS:%=%-d) $(DRIVERS)
ldDEP = $(filter %/$1.o,$(cTRG)) $(if $(filter %-d,$1),$(ldSRC:%.o=%-d.o),$(ldSRC))
+# Determine if '1' is newer than '2'
+TSTAMP = $(if $(wildcard $1),$(shell stat -c %Y $1),0$(info nots: $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]))
# 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) ; $(call LDCMD,$^,$@)
-%-d.o: CFLAGS+= -Og -ggdb
+%-d.o: CFLAGS+= -Og -ggdb -DDEBUG=$(DEBUG)
%.o %-d.o: %.c $$(call cGENDEP,$$(dir $$@)%.c) ; $(call CCMD,$<,$@)
%.tab.h: %.tab.c ;
%.tab.c: %.y $$(call S2S,YCMD,%.y,$$@) ;